User Manual ControlLogix Configurable Flowmeter Module Catalog Numbers 1756-CFM
Important User Information Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation® sales office or online at http://www.rockwellautomation.com/literature/) describes some important differences between solid-state equipment and hard-wired electromechanical devices.
Summary of Changes This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph. New and Updated Information This table contains the changes made to this revision. Topic Page The Gross Rate for the Prover Function has been updated. 48 The Configurable Output Behaviors section has been added. 58 The Attention and Warning tables have been updated.
Summary of Changes Notes: 4Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Table of Contents Preface Who Should Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Chapter 1 What is the Configurable Flowmeter Module? What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Using a ControlLogix CFM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Choosing an Operational Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Operating in High Resolution Frequency Mode . . . . . . . . . . . . . . . . . 36 Terminal Usage in High Resolution Frequency Mode. . . . . . . . . . 37 Output Operation in Frequency Mode. . . . . . . . . . . . . . . . . . . . . . 37 Module Features Used in High Resolution Frequency Mode . . . . 38 Alarms in High Resolution Frequency Mode. . . . . . . . . . . . . . . . .
Table of Contents 7 Chapter 5 Configuring the Configurable Flowmeter Module What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Using this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Overview of the Configuration Process . . . . . . . . . . . . . . . . . . . . . . . . 78 Creating a New Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Communications Format. . . . . . . . . . . .
Table of Contents Appendix D Frequency Accuracy Frequency Accuracy in High Resolution Frequency Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Calculate Frequency Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Frequency Accuracy in Totalizer Mode . . . . . . . . . . . . . . . . . . . . . . . 143 Calculate Frequency Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface This manual describes how to install, configure, and troubleshoot your ControlLogix® Configurable Flowmeter module. Who Should Use This Manual You must be able to program and operate an Allen-Bradley® ControlLogix controller to efficiently use your Configurable Flowmeter module. Additional Resources These documents contain additional information concerning related products from Rockwell Automation.
Preface Notes: 10Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Chapter 1 What is the Configurable Flowmeter Module? What this Chapter Contains This chapter describes the ControlLogix Configurable Flowmeter (1756-CFM) module. It also describes what you must know and do before using the module.
What is the Configurable Flowmeter Module? Using a ControlLogix CFM Module ControlLogix CFM modules mount in a ControlLogix chassis and use a Removable Terminal Block (RTB) or a Bulletin 1492 Interface Module cable that connects to an IFM to connect all field-side wiring. Before you install and use your module you should have already: installed and grounded a 1756 chassis and power supply.
What is the Configurable Flowmeter Module? Physical Features METERING Indicators F 0 O 0 Z 0 O 1 F 1 Z 1 O K DC I/O Top and bottom guides Locking tab Removable Terminal Block Connector pins ControlLogix backplane connector Slots for keying the RTB 40200-M ControlLogix backplane connector - The backplane connector interface for the ControlLogix system connects the module to the ControlLogix backplane.
What is the Configurable Flowmeter Module? Typical Applications You can use the CFM module in power management, automotive, food and beverage, and oil and gas industries for various flow and/or turbine metering applications. This figure shows a CFM module in a turbine shaft speed monitoring application. In this example, the 1756-CFM module is operating in high resolution frequency mode. Other examples are shown in Chapter 3 to reflect the various operational modes available on the 1756-CFM module.
What is the Configurable Flowmeter Module? Understanding Module Input Capabilities 15 The CFM module accepts input for up to two channels (mode dependent). Each of the input channels can connect to: Magnetic Pickup - 50mV trigger TTL output - 1.3V trigger Preamp outputs - 4V trigger You configure the CFM module’s two input channels for your specific application(s). Each input channel has two input selections: Flowmeter Input (F0 & F1) - Connect input device to this input.
What is the Configurable Flowmeter Module? Using Module Identification and Status Information Each ControlLogix CFM module maintains specific identification information that separates it from all other modules. This information assists you in tracking all the components of your system. For example, you can track module identification information to be aware of exactly what modules are located in any ControlLogix rack at any time.
Chapter 2 Configurable Flowmeter Operation in the ControlLogix System What This Chapter Contains This chapter describes how the CFM module works within the ControlLogix system.
Configurable Flowmeter Operation in the ControlLogix System 1756-CFM modules follow these basic operational steps, as shown in Figure 2. 1. The Logix controller establishes a connection to the CFM module and downloads configuration via ladder logic and message instructions. 2. Flowmeters transmit input signals to the CFM module. 3. The 1756-CFM module calculates volume from accumulated pulse counts as engineering units. 4.
Configurable Flowmeter Operation in the ControlLogix System Ownership 19 Every CFM module in the ControlLogix system must be owned by a Logix5550® Controller. The owner-controller: stores configuration data for every CFM module that it owns. can be local or remote in regard to the I/O module’s position. sends configuration data to the CFM module to define the module’s behavior within the control system. Each CFM module continuously maintains communication with its owner during normal operation.
Configurable Flowmeter Operation in the ControlLogix System CFM Modules in Local Chassis CFM modules in the same chassis as the owner-controller are ready to run as soon as the configuration data has been downloaded. CFM Modules in Remote Chassis You must run RSNetWorx™ software to enable CFM modules in the networked chassis. Running RSNetWorx software transfers configuration data to networked modules and establishes a Network Update Time (NUT) for ControlNet.
Configurable Flowmeter Operation in the ControlLogix System Connections 21 Logix controllers make connections to 1756-CFM modules to exchange data. The controller can make either of the following connections to a 1756-CFM module: Direct Connections - Only one controller can make this connection to a CFM module. Listen-Only Connections - Multiple controllers can make this connection to a CFM module simultaneously.
Configurable Flowmeter Operation in the ControlLogix System Listen-Only Connections Any controller in the system can listen to the data from any CFM module even if the controller does not own the module (in other words, it does not have to hold the module’s configuration data to listen to the module). During the CFM module creation process in RSLogix 5000 software, you can specify the ‘Listen-Only’ Communication Format. For more information on Communication Format, see page 82.
Configurable Flowmeter Operation in the ControlLogix System Configurable Flowmeter Modules in a Local Chassis 23 CFM modules multicast their data periodically. Multicast frequency depends on the options chosen during configuration and where in the control system the module physically resides. The data consumer (an owner-controller) is responsible for knowing that the format of the new data is integers.
Configurable Flowmeter Operation in the ControlLogix System Configurable Flowmeter Modules in a Remote Chassis If an CFM module resides in a networked chassis, the role of the RPI changes slightly with respect to getting data to the owner. The RPI not only defines when the module multicasts data within its own chassis (as described in the previous section), but also determines how often the owner-controller will receive it over the network.
Chapter Configurable Flowmeter Module Features and Operational Modes What this Chapter Contains This chapter describes the ControlLogix Configurable Flowmeter module’s features and operational modes.
Configurable Flowmeter Module Features and Operational Modes Removal and Insertion Under Power (RIUP) All ControlLogix CFM modules may be inserted and removed from the chassis while power is applied. This feature allows greater availability of the overall control system because, while the module is being removed or inserted, there is no additional disruption to the rest of the controlled process.
Configurable Flowmeter Module Features and Operational Modes 27 Electronic Keying The electronic keying feature automatically compares the expected module, as shown in the RSLogix 5000 I/O Configuration tree, to the physical module before I/O communication begins. You can use electronic keying to help prevent communication to a module that does not match the type and revision expected.
Configurable Flowmeter Module Features and Operational Modes Figure 3 - General Tab IMPORTANT Changing electronic keying selections online may cause the I/O communication connection to the module to be disrupted and may result in a loss of data.
Configurable Flowmeter Module Features and Operational Modes EXAMPLE 29 In this scenario, Exact Match keying prevents I/O communication. The module configuration is for a 1756-IB16D module with module revision 3.1. The physical module is a 1756-IB16D module with module revision 3.2. In this case, communication is prevented because the Minor Revision of the module does not match precisely.
Configurable Flowmeter Module Features and Operational Modes With Compatible Keying, you can replace a module of a certain Major Revision with one of the same catalog number and the same or later, that is higher, Major Revision. In some cases, the selection makes it possible to use a replacement that is a different catalog number than the original. For example, you can replace a 1756-CNBR module with a 1756-CN2R module.
Configurable Flowmeter Module Features and Operational Modes EXAMPLE 31 In this scenario, Compatible Keying allows I/O communication: The module configuration is for a 1756-IB16D module with module revision 2.1. The physical module is a 1756-IB16D module with module revision 3.2. In this case, communication is allowed because the major revision of the physical module is higher than expected and the module determines that it is compatible with the prior major revision.
Configurable Flowmeter Module Features and Operational Modes Disabled Keying Disabled Keying indicates the keying attributes are not considered when attempting to communicate with a module. Other attributes, such as data size and format, are considered and must be acceptable before I/O communication is established. With Disabled Keying, I/O communication may occur with a module other than the type specified in the I/O Configuration tree with unpredictable results.
Configurable Flowmeter Module Features and Operational Modes EXAMPLE 33 In this scenario, Disable Keying allows I/O communication: The module configuration is for a 1756-IA16 digital input module. The physical module is a 1756-IB16 digital input module. In this case, communication is allowed because the two digital modules share common data formats.
Configurable Flowmeter Module Features and Operational Modes Module Status Information The ControlLogix CFM module has status indicators on the front of the module that allow you to check the module health and operational status.
Configurable Flowmeter Module Features and Operational Modes 35 User-Defined Preset and Rollover Values The CFM module has a maximum count of 2,147,483,647, but you can define the rollover values below this limit. Current-Sourcing Outputs Two current-sourcing outputs are available on the CFM module. Each output: can be tied to any Flowmeter input. operates in the 10-31.2V DC range (1A maximum per output). operates at 5V DC level (3-20mA maximum per output).
Configurable Flowmeter Module Features and Operational Modes Operating in High Resolution Frequency Mode In High Resolution Frequency mode, the CFM module calculates frequency over a user-defined time period up to 2 seconds. Frequency sampling begins on the leading edge of the first pulse and ends on the next pulse to occur after the sampling period expires. This figure shows a CFM module in a turbine shaft speed monitoring application in high resolution frequency mode.
Configurable Flowmeter Module Features and Operational Modes Terminal Usage in High Resolution Frequency Mode In Frequency mode, F0 and F1 are used as inputs. Output Operation in Frequency Mode In Frequency mode, outputs can: operate normally be forced ON or OFF. be tied to the frequency flowmeter input (i.e. F1).
Configurable Flowmeter Module Features and Operational Modes Module Features Used in High Resolution Frequency Mode The following module features are available in High Resolution Frequency mode.
Configurable Flowmeter Module Features and Operational Modes 39 Acceleration Calculation Acceleration Calculation is derived by using the rate of change of frequency over a specified number of samples (1 to 255). This moving average produces quick responses when the number of samples = 1 and stable, but slower, responses when the number of samples =255. The default number of samples used = 255, but a typical application uses 50 samples. There are significant differences between response times.
Configurable Flowmeter Module Features and Operational Modes Highest Allowed Frequency Use Highest Allowed Frequency to set the trigger point for Frequency. In other words, set this value so that when the input reaches it, the outputs are energized. This value is also used for the Overspeed Alarm. Acceleration Alarm Value Use Acceleration Alarm to set the trigger point for Acceleration. In other words, set this value so that when the input reaches it, the outputs are energized.
Configurable Flowmeter Module Features and Operational Modes Operating in Totalizer Mode 41 In Totalizer mode, the 1756-CFM module counts pulses and scales them to engineering units. Every effort is made to store the least significant count even when the least significant unit of the total is larger.
Configurable Flowmeter Module Features and Operational Modes Using the Totalizer Mode Prover Function In the Totalizer Mode Prover function, the CFM module interfaces to a prover and counts pulses using a Flowmeter or positive displacement meter. The module then scales pulse count to engineering units. The CFM module can also use this mode to calculate frequency over a user-defined time period, where frequency is calculated as counts per unit time.
Configurable Flowmeter Module Features and Operational Modes 43 Using a Prover A prover is used for the calibration of liquid meters in custody transfer applications. This calibration is done by comparing a metered throughput to a known volume in the prover. When enabled, the prover total updates while the spheroid moves between two detectors and is then compared to the predetermined volume of the prover section to ascertain the meter factor.
Configurable Flowmeter Module Features and Operational Modes Features Available with the Prover Function The following module features are available with the Totalizer Mode Prover function.
Configurable Flowmeter Module Features and Operational Modes 45 Trigger On Use Trigger On to determine what flowmeter state triggers the output to energize. For example, you can configure the CFM module to trigger an output when the flowmeter reaches a particular frequency (count).
Configurable Flowmeter Module Features and Operational Modes Total Overspeed Use Total Overspeed to monitor when a flowmeter exceeds the Highest Allowed Frequency. With this feature, the CFM module calculates speed by the number of pulses counted in a user-defined sampling period. When the speed exceeds Highest Allowed Frequency, and the Overspeed Alarm is enabled, the Overspeed Alarm is set. Total Acceleration Use Total Acceleration to monitor when a flowmeter exceeds the maximum acceleration rate.
Configurable Flowmeter Module Features and Operational Modes 47 Frequency Period Use Frequency Period to determine the frequency over a user-defined sample time. Speed To use the Speed feature, you must set a resolution. The module uses the resolution to determine the number of counts used in the Speed calculation. For example, if you set the resolution at 0.00001, the module requires 100,000 counts.
Configurable Flowmeter Module Features and Operational Modes Gross Rate Use Gross Rate to convert total counts to rate units. The module employs a user-defined K-factor in the conversion. The K-factor is a divisor, and the time interval is divided by this number, as shown below. Gross Rate = Total Counts in Meter Sample K-factor x Meter Factor If the input frequency is below 100Hz, the K-factor used is always 10.0 for frequencies interpolated between 0-100Hz.
Configurable Flowmeter Module Features and Operational Modes IMPORTANT 49 For more information on setting values in the Module Tags, see Configuring the Configurable Flowmeter Module 5 on page 77. Net Rate Use Net Rate in a fashion similar to Gross Rate. The key difference between Gross Rate and Net Rate is that Net Volume also uses a user-defined compensation factor (i.e. AGA 7 or Logix compensation) to convert net counts to net rate units.
Configurable Flowmeter Module Features and Operational Modes Using the Totalizer Mode Filler Function The Totalizer Mode Filler function performs the basic operations of a fill application, including the following basic steps: Set a target fill volume Start filling Stop filling when the target volume is reached Within the basic operations mentioned above, the Filler function provides multiple features that can be configured to adjust the fill application for specific circumstances.
Configurable Flowmeter Module Features and Operational Modes 51 Trickle Function for Totalizer Mode The trickle function is used with the filler function to improve volume repeatability in a filling application. The trickle function requires two filling lines and an optional discrete module to activate the trickle valve. Activation of the valve should be sized for worst case volume at least 100 ms based on typical program scan = 5 ms and an output module RPI = 25 ms.
Configurable Flowmeter Module Features and Operational Modes Configurable Features Available with the Totalizer Mode Filler Function The following configurable features are available with the Totalizer Mode Filler function: Module Features Page Low Frequency Clear 52 PreTrigger 53 Fill Mode 53 Trigger On 53 Tie to Counter 53 Fill Enable 53 Fill Start 54 Fill Hold 54 Fill State 54 Fill Total 55 Total Counts 55 Gross Volume 55 Net Volume 55 Net Rate 57 Fill Total Target 57
Configurable Flowmeter Module Features and Operational Modes 53 PreTrigger PreTrigger works only on the Full Flow state. PreTrigger turns OFF the Full Flow state when it determines that the Fill Transition or Fill Total Target will be met before the next update. You must assign a channel to the local module output for this feature to provide repeatable operation. Fill Mode Use Fill Mode to choose volume or time for Trickle mode operation.
Configurable Flowmeter Module Features and Operational Modes Fill Start Fill Start starts the Fill upon transition from 0 to 1. Reset the Fill Enable to reset this feature. If any outputs are connected to the channel, they will transition back to reset and close the valve. Fill Hold Use the Fill Hold feature to shutdown the: full flow valve or trickle flow valve.
Configurable Flowmeter Module Features and Operational Modes 55 Fill Total Use Fill Total to determine the current total in an ongoing fill application. During the fill cycle, use Net Volume to check the Fill Total. Total Counts Use Total Counts for the accumulated raw counts the CFM module has received since its last reset. The total counts may be used for applications that employ a different methodology to calculate Gross and Net Volumes.
Configurable Flowmeter Module Features and Operational Modes If the input frequency is greater than 100Hz-200Hz, the K-factor is interpolated as follows: K-factor = (fin - 100.0) x (71.0 - 25.0) (200.0 - 100.0) x 25.0 If the input frequency is greater than 200Hz-300Hz, the K-factor is interpolated as follows: K-factor = (fin - 200.0) x (111.0 - 71.0) (300.0 - 200.0) x 71.0 If the input frequency is greater than 300Hz, the K-factor used is always 100.0.
Configurable Flowmeter Module Features and Operational Modes 57 Net Rate Use Net Rate to convert Net Volume to a rate using the following equation: Net Volume = Total Counts in Meter Sample K-factor x Sample Interval x Meter Factor x CCF Fill Total Target Fill Total Target is the user-defined final volume (in engineering units) for a total fill. Fill Transition Fill Transition is the user-defined Net Volume value to switch from full flow to trickle flow.
Configurable Flowmeter Module Features and Operational Modes Firmware revision 2.4 enables you to configure the 1756-CFM module outputs to turn on or off at specified frequency counts. Three types of behaviors, listed in the Frequency Values and Resulting Behaviors table, can be configured with the use of firmware revision 2.4. Use this table as a reference when determining on/off frequency values later in the configuration procedure.
Configurable Flowmeter Module Features and Operational Modes How To Enable Output Behavior Configuration To enable output behavior configuration for a 1756-CFM module with firmware revision 2.4, select one of these options. If you are using RSLogix 5000 software version 16 or earlier, see Appendix E on page 147. If you are using RSLogix 5000 software version 17 or later, add a new module to your I/O Configuration folder and complete the following steps. 1.
Configurable Flowmeter Module Features and Operational Modes Notes: 60Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Chapter 4 Installing the Configurable Flowmeter Module What this Chapter Contains ATTENTION ! This chapter describes how to install the ControlLogix Configurable Flowmeter module.
Installing the Configurable Flowmeter Module North American Hazardous Location Approval The following information applies when operating this equipment in hazardous locations. Informations sur l’utilisation de cet equipement en environnements dangereux. Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only.
Installing the Configurable Flowmeter Module ATTENTION ! Power Requirements 63 The ControlLogix system has been agency certified using only the ControlLogix RTBs (catalog numbers 1756-TBNH and 1756-TBSH). Any application that requires agency certification of the ControlLogix system using other wiring termination methods may require application specific approval by the certifying agency.
Installing the Configurable Flowmeter Module Installing the Module You can install or remove the module while chassis power is applied. WARNING ! WARNING ! When you insert or remove the module while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding. Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector.
Installing the Configurable Flowmeter Module 65 2. Slide the module into the chassis until the module locking tabs click. Locking tab 20862–M Keying the Removable Terminal Block/Interface Module Wedge-shaped keying tabs and U-shaped keying bands came with your RTB to prevent connecting the wrong wires to your module. Key positions on the module that correspond to unkeyed positions on the RTB. For example, if you key the first position on the module, leave the first position on the RTB unkeyed.
Installing the Configurable Flowmeter Module Key the RTB/IFM 1. Insert the wedge-shaped tab with the rounded edge first, as shown in this figure. Wedge-shaped tab 20851–M 2. Push the tab until it stops. Reposition the tabs to rekey future module applications. Wiring the Removable Terminal Block Wire the RTB with a 8mm (5/16 in.) maximum flat-bladed screwdriver before installing it onto the module. Shielded cable is required with this module. We recommend using Belden 8761 cable to wire the module.
Installing the Configurable Flowmeter Module 67 Connect Grounded End of the Cable 1. Ground the drain wire, as shown in this figure. IMPORTANT A. Remove a length of cable jacket from the connecting cable. B. Pull the foil shield and bare drain wire from the insulated wire. We recommend grounding the drain wire at the field-side. If you cannot ground at the field-side, ground at an earth ground on the chassis as shown. C. Twist the foil shield and drain wire together to form a single strand. D.
Installing the Configurable Flowmeter Module Connect Wires to the RTBs There are two types of RTBs available for use with the 1756-CFM module: 1756-TBSH Spring Clamp RTB 1756-TBNH NEMA Screw RTB 1756-TBSH Spring Clamp RTB 1. Strip 11mm (7/16 in.) maximum length of wire. 2. Insert the screwdriver into the inner hole of the RTB, as shown in this figure. Screwdriver Wire 20863–M 3. Insert the wire into the open terminal and remove the screwdriver.
Installing the Configurable Flowmeter Module 69 1756-TBNH NEMA Screw RTB 1. Strip 8mm (5/16 in.) maximum length of wire. 2. Turn the terminal screw counterclockwise. Figure 5.1 42516 3. Wrap wire around the terminal. 4. Turn the terminal screw clockwise until it tightens on the wire. Wiring the Module You can only connect wiring to your module through an RTB or IFM. In this chapter, we show how to wire the 1756-CFM for three applications.
Installing the Configurable Flowmeter Module Standard Flowmeter Wiring Example Flowmeter + Device – Shield ground Z0 12-24V DC 2 1 Z1 12-24V DC Z0 5V DC 4 3 Z1 5V DC Z0 Return 6 5 Z1 RET F0 8 7 F1 F0 Return 10 9 F1 Return Not used 12 11 Not used Not used 14 13 Not used Output 0 16 15 Output 1 18 17 Customer Common 20 19 Customer Common Customer VCC Customer VCC 42568 NOTES: 1. This wiring diagram can be used in applications with 50mV (magnetic pickup), 1.
Installing the Configurable Flowmeter Module Standard Prover/Detector Wiring Example Detector #1 Detector #2 12-24V DC + Z0 12-24V DC – Shield ground Flowmeter + Device – Shield ground 2 1 Z1 12-24V DC Z0 5V DC 4 3 Z1 5V DC Z0 Return 6 5 Z1 RET F0 8 7 F1 F0 Return 10 9 F1 Return Not used 12 11 Not used Not used 14 13 Not used Output 0 16 15 Output 1 18 17 Customer Common 20 19 Customer Common Customer VCC Customer VCC 42569 NOTE: 1.
Installing the Configurable Flowmeter Module Standard Output Wiring Example + Load – Z0 12-24V DC 2 1 Z1 12-24V DC Z0 5V DC 4 3 Z1 5V DC Z0 Return 6 5 Z1 RET F0 8 7 F1 F0 Return 10 9 F1 Return Not used 12 11 Not used Not used 14 13 Not used Output 0 16 15 Output 1 Customer VCC 18 17 Customer Common Customer VCC 20 19 + + Customer Common Load – – 42570 NOTE: If separate power sources are used, do not exceed the specified isolation voltage.
Installing the Configurable Flowmeter Module Assembling the Removable Terminal Block and Housing 73 1. Align the grooves at the bottom of the housing with the side edges of the RTB. Groove Side edge of the RTB Strain relief area Groove Side edge of the RTB 20852-M 2. Slide the RTB into the housing until it snaps into place.
Installing the Configurable Flowmeter Module 1. Align the side, top and bottom RTB guides with the side, top and bottom module guides. Module top guide RTB side guides 20853–M 2. Press quickly and evenly to seat the RTB on the module until the latches snap into place. 3. Slide the locking tab down to lock the RTB onto the module.
Installing the Configurable Flowmeter Module 1. Unlock the locking tab at the top of the module. 42517 2. Open the RTB door and pull the RTB off the module, as shown in Figure 5.2. Figure 5.
Installing the Configurable Flowmeter Module Removing the Module WARNING ! When you insert or remove the module while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding. Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance that can affect module operation. 1.
Chapter 5 Configuring the Configurable Flowmeter Module What this Chapter Contains This chapter describes how to configure the ControlLogix Configurable Flowmeter module using the RSLogix 5000 software.
Configuring the Configurable Flowmeter Module Using this Chapter This chapter is broken into two sections: Overview of the Configuration Process - Includes a detailed explanation of how to perform each task mentioned in the overview Examples of how to configure your CFM module for any of the following operational modes: – High resolution frequency mode – Totalizer mode using the prover function – Totalizer mode using the filler function This chapter is intended to teach you how to configure the CF
Configuring the Configurable Flowmeter Module Figure 5 - Overview of the Configuration Process New Module See page 80 See page 81 To Alter Default Configuration See page 84 RPI Screen Set RPI Inhibit module See page 84 FINISH Change configuration before module operation begins See page 85 Change configuration after module operation has begun 1.Select a module from the list 2.Choose a Major Revision Naming Screen Name Description Slot number Comm.
Configuring the Configurable Flowmeter Module Creating a New Module After you have started the RSLogix 5000 software and created a controller, you must create a new CFM module. The wizard allows you to create a new module and set communications options. IMPORTANT You must be offline when you create a new module. 1. Go offline. If you are not offline, use this pull-down menu to go offline 2. Select a CFM module. A. Select I/O Configuration. B. Click on the right mouse button to display the menu.
Configuring the Configurable Flowmeter Module 81 A screen appears with a list of possible new modules for your application. Make sure the Major Revision number matches the label on the side of your module A. Select a 1756-CFM module B. Click here The new module creation wizard appears. A. Type a name (optional). B. Type a description (optional). C. Choose a Communications Format. For a detailed description of this field see page 82. D.
Configuring the Configurable Flowmeter Module Communications Format The communications format determines what type of data is transferred between the CFM module and its owner-controller. This feature also defines the connection between the controller writing the configuration and the module itself. The following communications formats are available for your CFM module: Data - Use this format for a controller that you want to own the CFM module and control its configuration data.
Configuring the Configurable Flowmeter Module 83 Electronic Keying When you create a new CFM module, you can choose how specific the keying must be when a module is inserted into the CFM module’s slot in the chassis. The screen below shows the choices available. For more information, see Electronic Keying on page 27. Using the Default Configuration If you want to use the default configuration, click on Finish as shown below.
Configuring the Configurable Flowmeter Module Altering the Default Configuration If you want to alter or view the default configuration, click on Next. On the next wizard screen, you can change the CFM module’s configuration as shown below. Adjust the Requested Packet Interval here.
Configuring the Configurable Flowmeter Module Accessing the Tags When you access tags to change configuration or monitor the I/O data exchange, you have two options: Monitor tags - This option allows you to view tags and change their values. Edit tags - This option allows you to add or delete tags but not to change their values. 1. Access the tags. A. Select Controller Tags B. Right-click to display the menu C. Select Monitor Tags 2. View tags here.
Configuring the Configurable Flowmeter Module Changing Configuration Information at the Tags Some configurable features are changed on a module-wide basis and some on a point-by-point basis. Configurable Features There are two ways to change the configuration: Use a pull-down menu. Highlight the value of a particular feature for a particular point and type a new value. Pull-down Menu A. Click on the far left side of the Value column and a pull-down menu appears. B.
Configuring the Configurable Flowmeter Module Downloading Configuration Data After you have changed the configuration data for an CFM module, the change does not actually take affect until you download the new program which contains that information. This downloads the entire program to the controller overwriting any existing programs. 1. Download the configuration data. A. Click on the triangle to see the pull-down menu. B. Click on Download.
Configuring the Configurable Flowmeter Module Changing Configuration During CFM Module Operation After the CFM module has begun operation, you can only change configuration by using ladder logic and message instructions. Follow these steps to change CFM module configuration during operation: 1. Access the CFM data structures through the tag monitor to make specific configuration changes, see page 85. 2.
Configuring the Configurable Flowmeter Module Using Message Instructions 89 Ladder logic uses message instructions to change the CFM module configuration during module operation.
Configuring the Configurable Flowmeter Module Creating a New Tag Ladder logic is written in the Main Routine section of RSLogix 5000 software. 1. Access the Main Routine. Double-click here to enter the Main Routine 2. Add a message instruction to Rung 0. A. Right-click on the rung to see the pull-down menu. B. Click on Add Ladder Element. 3. Choose a Message element from the Choose Ladder Element screen. B. Click here. A. Choose the Message element.
Configuring the Configurable Flowmeter Module 91 4. Create a tag for the message instruction. A. Right-click on the question mark (?) to see the pull-down menu. B. Click on New Tag. Fill in the following information when the New Tag pop-up screen appears: IMPORTANT We suggest you name the tag to indicate what module service is sent by the message instruction. For example, the message instruction below is used to write configuration. Name the tag here. Enter an optional description here.
Configuring the Configurable Flowmeter Module Enter Message Configuration After creating a new tag, you must enter message configuration. Click here to see the message configuration pop-up screens Enter message configuration on the following screens: Configuration Pop-Up Screen Communications Pop-Up Screen Tag Pop-Up Screen A description of the purpose and set-up of each screen follows.
Configuring the Configurable Flowmeter Module 93 Communications Pop-Up Screen This pop-up screen provides information on the path of the message instruction. For example, the slot number of a 1756-CFM module distinguishes exactly which module a message is designated for. Use the Browse button to choose the CFM module that you want to send configuration changes to.
Configuring the Configurable Flowmeter Module Tag Pop-Up Screen This screen provides an opportunity to change some characteristics of the newly created tag. Access this screen to change a tag’s: Name Description Style Number of consumers IMPORTANT You must add a second Apply rung to the ladder logic to send configuration to the CFM module.
Configuring the Configurable Flowmeter Module Configuring CFM Modules in a Remote Chassis 95 ControlLogix ControlNet Interface modules (1756-CNB or 1756-CNBR) are required to communicate with CFM modules in a remote chassis. You must configure the communications module in the local chassis and the remote chassis before adding new I/O modules to the program. 1. Create a 1756-CNB or 1756-CNBR module in the local chassis. A. Select I/O Configuration. B. Click on the right mouse button to display the menu.
Configuring the Configurable Flowmeter Module 4. Create a 1756-CNB or 1756-CNBR module for the remote chassis. A. Select the local communications module. B. Click on the right mouse button and select New Module. Notice that the remote 1756-CNB module is added to the Controller Organizer through the local 1756-CNB module. 5. Choose a 1756-CNB or 1756-CNBR module on the Select Module Type screen. 6. Configure the remote 1756-CNB or 1756-CNBR module. 7.
Configuring the Configurable Flowmeter Module Sample Configuration for High Resolution Frequency Mode 97 High resolution frequency mode provides speed control of machinery such as turbines where shutdown on acceleration or speed is required independent of the owner-controller. Speed is calculated without the K-factor but includes the meter factor and CCF for special calculations. When using this mode, you may calculate resolution by using the following equation to calculate resolution.
Configuring the Configurable Flowmeter Module Follow the steps below to configure your CFM module for high resolution frequency mode. 1. Create a new module, see page 80. 2. Set all communications options, including: name communication format slot number minor revision electronic keying RPI - For this application, the minimum RPI = 5 ms See pages 81 to 84. 3. Access the module tags via the Tag Editor, see page 85. 4. Change only the tags listed in Table 7.
Configuring the Configurable Flowmeter Module Table 7 - Tag Changes Required for High Resolution Frequency Mode Name Style Data type Definition C.Operations[0].SampleTime Float REAL 0.033 Sets time for a sample to be taken. (2.0 second maximum sample time for high resolution frequency mode and 5.0 second maximum sample time for totalizer mode) C.Operations[0].
Configuring the Configurable Flowmeter Module Table 7 - Tag Changes Required for High Resolution Frequency Mode Name Style Data type Definition Enter this Value O.Total[0].Overspeed Decimal BOOL Enables the Overspeed alarm on output connected to channel 0. When the Speed exceeds the Highest Allowed Frequency value, this alarm is set. 0 = No Alarm 1 = Alarm Enabled 1 O.Total[0].Acceleration Decimal BOOL Enables the Acceleration alarm on output connected to channel 0.
Configuring the Configurable Flowmeter Module Sample Configuration for Totalizer Mode Prover Function 101 In the Totalizer Mode Prover function, the CFM module interfaces to a prover and counts pulses using a Flowmeter or positive displacement meter. The module then scales pulse count to engineering units. The CFM module also calculates frequency over a user-defined time period. When using totalizer mode (with prover or fill function), you may apply a K-factor as a function of frequency, as shown below.
Configuring the Configurable Flowmeter Module 4. Change only the tags listed in Table 8. Ignore all other tags; they do not affect totalizer mode prover function. Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition Enter this Value C.ProgToFaultEn Decimal BOOL Sets outputs to selected Fault state when the owner-controller is in Program mode. 0 = outputs use Program mode setting 1 = outputs use fault mode settings 0 C.Operations[0].
Configuring the Configurable Flowmeter Module 103 Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition Enter this Value C.Operations[0].MeterFactor Float REAL Calibration Adjust for metering reading applied after K-factor correction. Typically, this factor is between 0.8 and 1.2 but the module restricts the value>0. 1.0 C.Operations[0].
Configuring the Configurable Flowmeter Module Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition Enter this Value C.Operations[0].kFactStruct.kFactorForChan[11] Float REAL This tag is an ordered pair with tag C.Operations[0].kFactStruct.FreqAtKFactor [11] 0.0 C.Operations[0].kFactStruct.kFactorForChan[12] Float REAL This tag is an ordered pair with tag C.Operations[0].kFactStruct.FreqAtKFactor [12] 0.0 C.Operations[0].kFactStruct.
Configuring the Configurable Flowmeter Module 105 Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition Enter this Value C.OutputSetup[0].
Configuring the Configurable Flowmeter Module Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition Enter this Value O.Total[0].Overspeed Decimal BOOL Enables the Overspeed alarm on output connected to channel 0. When the Speed exceeds the Highest Allowed Frequency value, this alarm is set. 0 = No Alarm 1 = Alarm Enabled 1 O.Total[0].Acceleration Decimal BOOL Enables the Acceleration alarm on output connected to channel 0.
Configuring the Configurable Flowmeter Module 107 Table 8 - Tag Changes Required for Totalizer Mode Using Prover Function Name Style Data type Definition I.Status[0].ProverTotal Float REAL Corrected/compensated volume received on Channel 0 during prover cycle. Prover total resets when the ProverEnable transitions from 0-1. Prover total concurrently accumulates with net volume, and must be saved if subtracted from the NetVolume for single and multiple prover verifications. I.
Configuring the Configurable Flowmeter Module Sample Configuration for Totalizer Mode Filler Function In the Totalizer Mode Filler function, the CFM module interfaces to a prover and counts pulses using a Flowmeter or positive displacement meter. The module then scales pulse count to engineering units. The CFM module also interpolates the K-Factors between frequencies 1-12. When using totalizer mode (with prover or fill function), you may apply a K-factor as a function of frequency, as shown below.
Configuring the Configurable Flowmeter Module 109 4. Change only the tags listed in Table 9. Ignore all other tags; they do not affect totalizer mode using the prover function. Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition Enter this Value C.ProgToFaultEn Decimal BOOL Sets outputs to selected Fault state when the owner-controller is in Program mode. 0 = outputs use Program mode setting 1 = outputs use fault mode settings 0 C.
Configuring the Configurable Flowmeter Module Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition Enter this Value C.Operations[0].FilterResolution Float REAL Sets resolution of the Speed calculation based on the raw counts 0 = default of 0.00001 0.00001 = resolution of + 1 count of 100,000 raw counts. 0.166 C.Operations[0].SampleTime Float REAL Sets time for a sample to be taken. (2.
Configuring the Configurable Flowmeter Module Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition Enter this Value C.Operations[0].kFactStruct.FreqAtKFactor[5] Float REAL Freq[5] for KFactor [5] 0.0 C.Operations[0].kFactStruct.FreqAtKFactor[6] Float REAL Freq[6] for KFactor [6] 0.0 C.Operations[0].kFactStruct.FreqAtKFactor[7] Float REAL Freq[7] for KFactor [7] 0.0 C.Operations[0].kFactStruct.
Configuring the Configurable Flowmeter Module Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition Enter this Value C.Ch0LowFreqClear Decimal BOOL Enables the minimum detectable frequency level for Channel 0. Set the bit to 1 to enable it 1 C.Ch0PreTrigger Decimal BOOL Enables the PreTrigger on Channel 0 for full flow. Set the bit to 1 to enable it 1 C.Operations[0].
Configuring the Configurable Flowmeter Module Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition Enter this Value O.Total[0].Overflow Decimal BOOL Enables the Overflow alarm on output connected to channel 0. When the Total Counts exceeds the Roll Over value, this alarm is set. 0 = No Alarm 1 = Alarm Enabled 0 O.Total[0].Overspeed Decimal BOOL Enables the Overspeed alarm on output connected to channel 0.
Configuring the Configurable Flowmeter Module Table 9 - Tag Changes Required for Totalizer Mode Using Filler Function Name Style Data type Definition I.Status[0].TotalCounts Decimal DINT Displays actual pulses counted by the counter connected to the channel 0 I.Status[0].FillTotal Float REAL Same calculation as Net Volume during fill cycle. I.Status[0].GrossVolume Float REAL Total Counts during each Sample/K-factor x Meter Factor as occurs on channel 0 I.Status[0].
Appendix A Troubleshooting the Configurable Flowmeter Module What this Appendix Contains This appendix describes how to troubleshoot the ControlLogix Configurable Flowmeter module. Using the Status Indicators For information on See page Using the Status Indicators 115 Using RSLogix 5000 Software to Troubleshoot Your Module 117 The CFM module offers status indicators to show the health of your module.
Troubleshooting the Configurable Flowmeter Module Table 10 - CFM Module Status Indicators LED indicators This display Means Take this action OK Steady green The inputs are being light multicast and in normal operating state. None OK Flashing green light The module has passed internal diagnostics but is not actively controlled. Configure the module. OK Flashing red light Previously established communication has timed out.
Troubleshooting the Configurable Flowmeter Module Using RSLogix 5000 Software to Troubleshoot Your Module 117 In addition to the LED display on the module, RSLogix 5000 software will alert you to fault conditions. You will be alerted in one of four ways: Warning signal on the main screen next to the module-This occurs when the connection to the module is broken Fault message in a screen’s status line Notification in the Tag Editor - General module faults are also reported in the Tag Editor.
Troubleshooting the Configurable Flowmeter Module Determining Fault Type When you are monitoring a module’s configuration properties in RSLogix 5000 software and receive a Communications fault message, the Connection page lists the type of fault.
Troubleshooting the Configurable Flowmeter Module 119 Using Error Codes Errors are displayed on the Connection tab of the Module Properties section in RSLogix 5000 software and in the .EXERR field of the message variable when your reconfigure the module.
Troubleshooting the Configurable Flowmeter Module Table 12 - Configurable Flowmeter Consumer Error Codes Error Code Definition 10 BAD_DYNAMIC_ERROR_VALUE 11 BAD_TRIGGER_ON_VALUE 12 BAD_COUNTER_TIE_VALUE 19 BAD_CCF_VALUE 20 BAD_BASE_TEMPERATURE_VALUE 21 BAD_FLOWINGTEMP_VALUE 22 BAD_ATMOSPHERICPRESSURE_VALUE 23 BAD_STATICGAUGEPRESSURE_VALUE 24 BAD_BASE_PRESSURE_VALUE 25 BAD_BASECOMPRESSIBILITY_VALUE 26 BAD_FLOWINGCOMPRESS_VALUE 27 BAD_FILL_TOTAL_TARGET_VALUE 28 BAD_FILL_TRANSI
Appendix B Software Configuration Tags This appendix lists the following categories of CFM data structures: Configuration - This structure is used to write CFM configuration upon insertion and to make changes during module operation. Input - This structure displays the current operational status of the CFM module. Output - This structure is used to modify module operation and override the outputs. Configuration Structure You must use the Configuration tags to alter CFM module configuration.
Software Configuration Tags Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Ch0PreTrigger Decimal BOOL Enables the PreTrigger on Channel 0 for full flow. Set the bit to 1 to enable it C.Ch1PreTrigger Decimal BOOL Enables the PreTrigger on Channel 1 for full flow. Set the bit to 1 to enable it C.Operations[0].OperationalMode Decimal SINT Sets the module’s operational mode.
Software Configuration Tags 123 Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Operations[0].AccelAlarmValue Float REAL Sets Acceleration alarm limit -Maximum acceleration (cycles per second2) 0.
Software Configuration Tags Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Operations[0].kFactStruct.FreqAtKFactor[4] Float REAL Freq[4] for KFactor [4] C.Operations[0].kFactStruct.FreqAtKFactor[5] Float REAL Freq[5] for KFactor [5] C.Operations[0].kFactStruct.FreqAtKFactor[6] Float REAL Freq[6] for KFactor [6] C.Operations[0].kFactStruct.FreqAtKFactor[7] Float REAL Freq[7] for KFactor [7] C.Operations[0].kFactStruct.
Software Configuration Tags 125 Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Operations[1].HighestAllowedFreq Float REAL User-defined value between MinDetectableFreq and 120,000 When the frequency reaches this level, it sets the Overflow alarm limit C.Operations[1].AccelAlarmValue Float REAL Sets Acceleration alarm limit -Maximum acceleration (cycles per second2)
Software Configuration Tags Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Operations[1].kFactStruct.FreqAtKFactor[1] Float REAL Freq[1] for KFactor [1] C.Operations[1].kFactStruct.FreqAtKFactor[2] Float REAL Freq[2] for KFactor [2] C.Operations[1].kFactStruct.FreqAtKFactor[3] Float REAL Freq[3] for KFactor [3] C.Operations[1].kFactStruct.FreqAtKFactor[4] Float REAL Freq[4] for KFactor [4] C.Operations[1].kFactStruct.
Software Configuration Tags 127 Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.Operations[1].kFactStruct.FreqAtKFactor[8] Float REAL Freq[8] for KFactor [8] C.Operations[1].kFactStruct.FreqAtKFactor[9] Float REAL Freq[9] for KFactor [9] C.Operations[1].kFactStruct.FreqAtKFactor[10] Float REAL Freq[10] for KFactor [10] C.Operations[1].kFactStruct.FreqAtKFactor[11] Float REAL Freq[11] for KFactor [11] C.Operations[1].kFactStruct.
Software Configuration Tags Table 13 - Configurable Flowmeter Module Configuration Tags Name Style Data type Definition C.OutputSetup[1].DynamicError Decimal SINT Sets the state of output 1 when a dynamic error occurs 0 = Continue operation 1 = Reset Output 0 to OFF on Error 2 = Set Output 0 to ON on Error C.OutputSetup[1].
Software Configuration Tags 129 Table 14 - Configurable Flowmeter Module Input Tags Name Style Data type Definition I.Ch1WasReset Decimal BOOL Displays whether channel 1 was reset 0 = output is not overridden 1 = output is overridden I.Ch0AccelerationAlarm Decimal BOOL Displays whether acceleration alarm was set on channel 0 0 = alarm was not set 1 = alarm was set I.
Software Configuration Tags Table 14 - Configurable Flowmeter Module Input Tags Name Style Data type Definition I.Status[0].FillState Decimal SINT Displays current state of module for channel 0.
Software Configuration Tags 131 Table 14 - Configurable Flowmeter Module Input Tags Name Style Data type Definition I.Status[1].FillState Decimal SINT Displays current state of module for channel 1.
Software Configuration Tags Output Tags You must use the Output tags to change CFM module configuration during operation. Table 15 lists and defines CFM Output tags: Table 15 - Configurable Flowmeter Module Output Tags Name Style Data type O.Total[0].AlarmEnables Binary SINT O.Total[0].Overrange Decimal BOOL Enables the Overrange alarm on output connected to channel 0. When the Frequency Period exceeds 100KHz, this alarm is set. 0 = No Alarm 1 = Alarm Enabled O.Total[0].
Software Configuration Tags 133 Table 15 - Configurable Flowmeter Module Output Tags Name Style Data type Definition O.Total[0].RollOverValue Decimal DINT Sets the user-defined rollover value on output connected to channel 0. Range of 0 - 2,147,483,647 O.Total[0].CombinedCorrectionFactor Float REAL Unitless factor that is multiplied by Gross Rate with results shown as NetRate of channel 0. This value must be set to 1.0 when not used or gross rate will be 0.
Software Configuration Tags Table 15 - Configurable Flowmeter Module Output Tags Name Style Data type Definition O.Total[1].Control Binary SINT O.Total[1].Reset Decimal BOOL O.Total[1].Load Decimal BOOL O.Total[1].ProverEnable Decimal BOOL Enables the prover operation on output connected to channel 1. Once this bit is enabled, the module waits for output Z0 to energize before beginning prover operations. 0 = Prover operation is disabled 1 = Prover operation is enabled O.Total[1].
Software Configuration Tags Table 15 - Configurable Flowmeter Module Output Tags Name Style Data type O.Total[1].FillTransitionTimer Float REAL Definition Decimal O.OutputControl[0].0 (A series of tags similar to this one are used repeatedly for outputs 0 - 31 connected to channel 0. The name changes in each occurrence for the specific output. For example, output 1 is named: O.OutputControl[0].1 Only output 0 is listed here but all exist in the RSLogix 5000 software.
Software Configuration Tags Notes: 136Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Appendix C Schematics What This Appendix Contains Use this appendix to understand the internal logic of the CFM module. Follow the wiring practices described in your system-level installation manual when wiring your I/O devices.
Schematics Gate Inputs Gate inputs are used for running prover and store count values. There is one gate associated with each flowmeter input circuit (G0 corresponds to F0). Input R2 Z0 (12-24V) 2 1k Z1 (12-24V) 1 physical and electrical isolation R1 Z0 (5V) 4 Z1 (5V) Z0 RET 3 RET 6 Z1 RET 5 150 C27 D1 D3 D2 +5V U2 Q1 R6 Z0 R7 C26 Z1 C28 42846 To turn on a gate circuit, you must source current through the input resistors sufficient to turn on the opto-isolator in the circuit.
Schematics Output Circuits 139 The CFM module provides two output circuits. Discrete Outputs The CFM module’s outputs are comprised of isolated power MOSFETs. These devices operate in current sourcing mode, and are capable of delivering up to 1A (@ 10-31.2V DC) and 20mA (@ 5V DC). physical and electrical isolation F1 Vcc R159 Output 0 Output 1 U20 R108 R109 D25 Output FET Customer 18 Vcc 20 Customer Vcc D24 Q11 16 Output 0 D26 The CFM module contains two output circuits.
Schematics Notes: 140Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Appendix D Frequency Accuracy Use this appendix to calculate the frequency accuracy for high resolution frequency mode and totalizer mode. Frequency Accuracy in High Resolution Frequency Mode There are two steps to calculating frequency accuracy in high resolution frequency mode. 1. Calculate frequency accuracy. 2. Determine the application’s operating conditions and add the error for those conditions to the value obtained in step 1.
Frequency Accuracy Use one of two equations to calculate the firmware error, in high resolution frequency mode. Choose the equation according to the frequency of your application.
Frequency Accuracy Frequency Accuracy in Totalizer Mode 143 There are two steps to calculating frequency accuracy in totalizer mode. 1. Calculate frequency accuracy. 2. Determine the application’s operating conditions and add the error for those conditions to the value obtained in step 1. The following values must be added to your frequency accuracy results in totalizer mode: Crystal error - 0.005% @ 25°C Drift and crystal error - 0.
Frequency Accuracy Use the following equation to calculate frequency accuracy in totalizer mode for frequency period: Accuracy = EXAMPLE (1) x (100) (Ts) x (Fin) For example, in an application with the following conditions: 0.5s time period 123Hz frequency 25°C operating temperature accuracy is determined with the following equation: Accuracy = (1) x (100) (0.5) x (123) + 0.005% Accuracy = 1.626 + 0.005 Accuracy = +/- 1.
Frequency Accuracy 145 Frequency Average For frequency average, you must know: Application frequency (Fin) Number of accumulated in sample time (Counts) Use the following equation to calculate frequency accuracy in totalizer mode for frequency period: Accuracy = EXAMPLE (1) x (100) (0.
Frequency Accuracy Notes: 146Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Appendix E Configure Output Behavior with RSLogix 5000 Version 16 and Earlier If you have a 1756-CFM module with firmware revision 2.4 and are using RSLogix 5000 software, version 16 or earlier, use this procedure to enable and configure the output behavior. If you do not want to use the output behavior features available in firmware revision 2.4, you do not need to complete this procedure. For an explanation of the output behavior features, see Configurable Output Behaviors on page 58.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier Configure the 1756-CFM for Use in a New Application Complete this procedure if you are using the 1756-CFM module and the configurable on/off feature in a new application. Add the 1756-Generic Profile to the Program 1. In RSLogix 5000 software, create a new project named CFM_DEMO. 2. Specify the controller type, revision number, chassis type, and slot number according to your ControlLogix controller chassis. 3.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 149 Copy and Paste the Tags and Logic from the Example to Your Program 1. Minimize the CFM_DEMO project and open a new instance of RSLogix 5000 software. 2. Open CFM_GenericProfileExample.ACD. 3. In the controller organizer of the CFM_GenericProfileExample project, expand the User-Defined data types. 4. Copy one of the User-Defined data types. You must select and copy each of the User-Defined data types individually. 5.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 7. In the CFM_GenericProfileExample project, copy the following data tags located in the Controller Tag folder. 8. In the CFM_DEMO project, paste the copied data tags into the Controller Tags folder by using the Edit Tags tab. 9. In the CFM_GenericProfileExample project, copy ladder logic rung 1 located in the Main Routine folder. 10. In the CFM_DEMO project, paste the copied rung into the Main Routine folder. 11.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 151 Specify the Configurable On/Off Behavior 1. In the CFM_DEMO program, select the Controller Tag folder and view the Monitor Tags tab. 2. Expand the CFM_B_C tag until you reach the CFM_B_C.OutputWindow data tags. 3. In the Value column of CFM_B_C.OutputWindow FreqOn and FreqOff data tags, enter the desired On and Off frequency limits. See Table 5 on page 58 for more information about determining your On/Off frequency limits.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier Configure a 1756-CFM Module for Use in an Existing Application Complete this configuration process if you are using the 1756-CFM module with an existing application. Add the 1756-Generic Profile to the Program 1. In RSLogix 5000 software, open a project that contains programming for an existing 1756-CFM module. 2. In the I/O configuration, delete the existing 1756-CFM module. 3. In the I/O configuration, add a new module.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 153 Copy and Paste the Tags and Logic from the Example to Your Program 1. Minimize the previously existing project and open a new instance of RSLogix 5000 software. 2. Open the CFM_GenericProfileExample.ACD. 3. In the controller organizer of the CFM_GenericProfileExample project, expand the User-Defined data types. 4. Copy one of the User-Defined data types. You must select and copy each of the User-Defined data types individually. 5.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 7. In the CFM_GenericProfile project, copy the following Controller Tag data tags. 8. In the other RSLogix 5000 project, paste the copied data tags into the Controller Tags folder. 9. In the CFM_GenericProfileExample project, copy ladder logic rung 1 located in the Main Routine folder. 10. In the other open RSLogix project, paste the copied rung into the Main Routine folder. 11. Accept the pasted rung. 12. Delete the empty rung.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier 155 Specify the Configurable On/Off Behavior 1. In the previously existing program, select the Controller Tag folder and view the Monitor Tags tab. 2. Expand the CFM_B_C tag until you reach the CFM_B_C.OutputWindow data tags. 3. In the Value column of the CFM_B_C.OutputWindow data tags, enter the desired the On and Off frequency limits. See Table 5 on page 58 for more information about determining your On/Off frequency limits. 4.
Configure Output Behavior with RSLogix 5000 Version 16 and Earlier Notes: 156Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Glossary The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here, refer to the Allen-Bradley Industrial Automation Glossary, publication AG-7.1. Broadcast Data transmissions to all addresses Communications format Format that defines the type of information transferred between an I/O module and its owner controller.
Glossary Major revision A module revision that is updated any time there is a functional change to the module resulting in an interface change with software Minor revision A module revision that is updated any time there is a change to the module that does not affect its function or software user interface (e.g.
Glossary 159 Totalizer Mode Operational mode in which CFM module counts pulses from a Flowmeter and scales them into volume (engineering units). Trickle Operational mode in which the CFM module controls two lines in a filling application, a full flow and a trickle flow. The trickle flow line provides users greater accuracy by slowly finishing the fill process.
Glossary Notes: 160Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
Index A Acceleration Alarm Value Feature in high resolution frequency mode 40 Acceleration Calculation Feature in high resolution frequency mode 39 Acceleration Feature in high resolution frequency mode 40 with prover function in totalizer mode 47 Accessing the Tags 85 Alarms in high resolution frequency mode 40 with the filler function in totalizer mode 57 with the prover function in totalizer mode 49 Applications Typical applications for the 1756-CFM module 14 Assembling the RTB and housing 73 C Changing
Index F Fault Reporting 26, 84, 118 Error codes 119 Features Internal 12, 25 Physical 13 Fill Enable Feature with filler function in totalizer mode 53 Fill Hold Feature with filler function in totalizer mode 54 Fill Mode Feature with filler function in totalizer mode 53 Fill Start Feature with filler function in totalizer mode 54 Fill State Feature with filler function in totalizer mode 54 Fill Total Feature with filler function in totalizer mode 55 Fill Total Target Feature with filler function in to
Index Inputs Flowmeter inputs 34 Gate inputs 34, 138 Input schematics 137 Installing the Module 64 Installing the RTB on the module 73 Interface Module (IFM) 12 K Keying Compatible match 157 Disable 157 Electronic 81, 83, 157 Exact match 157 Keying the module 65 Keying the RTB 66 Mechanical keying 13 Retrieving 26 Serial number 16 Status 16 Vendor ID 16 WHO service 16 Module Input Capabilities 15 Module Operation in Remote Chassis 24 Module Output Capabilities 15 Module Status Retrieving 16 Module Status
Index Producer/Consumer Communications Model 33 Program Mode 158 Programming Software Using RSLogix 5000 to troubleshoot the module 117 Prover Direction Feature with prover function in totalizer mode 44 Prover Function Acceleration feature 47 Alarms 49 Features available 44 Frequency average feature 46 Frequency period feature 47 Gross rate feature 48, 55 Gross volume feature 47 in totalizer mode 42 Low frequency clear feature 44 Net rate feature 49 Net volume feature 47 Prover direction feature 44 Pr
Index T Tag Pop-Up Screen 94 Tags Accessing 85 Changing configuration at the tags 86 Creating a new tag 90 Tie to Counter Feature in high resolution frequency mode 39 with filler function in totalizer mode 53 with prover function in totalizer mode 45 Total Acceleration Feature with prover function in totalizer mode 46 Total Counts Feature with filler function in totalizer mode 55 with prover function in totalizer mode 46 Total Overflow Feature with prover function in totalizer mode 45 Total Overrange Featu
Index 166Rockwell Automation Publication 1756-UM010B-EN-P - December 2011
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