User Manual Compact I/O RTD/Resistance Input Module Catalog Number 1769-IR6
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.
Summary of Changes Notes: 4 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Table of Contents Preface Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Conventions Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Chapter 1 Overview General Description . . . . .
Table of Contents Wiring RTDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Wiring Resistance Devices (Potentiometers) . . . . . . . . . . . . . . . . . . . . 42 Chapter 4 Module Data, Status, and Channel Configuration 6 Module Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Chapter 5 Diagnostics and Troubleshooting Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Activating Devices When Troubleshooting . . . . . . . . . . . . . . . . . . . . . Stand Clear of the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Program Alteration . . . . . . . . . . . . . . . . . .
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Preface Read this preface to familiarize yourself with the rest of the manual. Who Should Use This Manual Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley Compact™ I/O and/or compatible controllers, such as MicroLogix 1500 or CompactLogix.
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Chapter 1 Overview This chapter describes the six-channel 1769-IR6 RTD/resistance Input module and explains how the controller reads resistance temperature detector (RTD) or direct resistance-initiated analog input data from the module. Included is: · a general description of hardware features · an overview of module and system operation · compatibility General Description The 1769-IR6 module supports RTD and direct resistance signal measurement applications that require up to six channels.
Chapter 1 Overview The following data formats are supported by the module.: · · · · · raw/proportional engineering units x 1 engineering units x 10 scaled-for-PID percent full scale Available filter frequencies are: · · · · · · 10 Hz 50 Hz 60 Hz 250 Hz 500 Hz 1 kHz The module uses eight input words for data and status bits and seven configuration words. Module configuration is stored in the controller memory. Normally configuration is done via the controller’s programming software.
Overview Chapter 1 Table 1 - RTD Specifications RTD Type(1) Temperature Range Using 0.5 mA Excitation Temperature Range Using 1.0 mA Excitation Maximum Scaled Resolution Maximum Scaled Repeatability Copper 426 10 Ω Not allowed -100…260 °C (-148…500 °F) 0.1 °C (0.1 °F) ±0.2 °C (±0.4 °F) Nickel 618(2) 120 Ω -100…260 °C (-148…500 °F) -100…260 °C (-148…500 °F) 0.1 °C (0.1 °F) ±0.1 °C (±0.2 °F) Nickel 672 120 Ω -80…260 °C (-112…500 °F) -80…260 °C (-112…500 °F) 0.1 °C (0.1 °F) ±0.1 °C (±0.
Chapter 1 Overview The table below provide specifications for RTD accuracy and temperature drift. The ratings apply when a 50/60 Hz filter is used. Table 2 - RTD Accuracy and Temperature Drift RTD Type Maximum Scaled Accuracy (25 °C with Calibration) Maximum Scaled Accuracy (0…60 °C with Calibration) Maximum Temperature Drift (from 25 °C without Calibration) Copper 426 10 Ω ±0.8 °C (1.44 °F) ±1.1 °C (1.98 °F) ±0.032 °C/°C (0.032 °F/°F) Nickel 618 120 Ω ±0.3 °C (±0.54 °F) ±0.5 °C (±0.9 °F) ±0.
Overview Chapter 1 Resistance Device Compatibility The following table lists the specifications for the resistance devices that you can use with the module. Table 3 - Resistance Device Specifications Resistance Device Type Resistance Range (0.5 mA Excitation) Resistance Range (1.0 mA Excitation) Accuracy(1) Temperature Drift Resolution Repeatability 150 Ω 0…150 Ω 0…150 Ω ±0.15 Ω ±0.007 Ω/°C (±0.013 Ω/°F) 0.01 Ω ±0.04 Ω 500 Ω 0…500 Ω 0…500 Ω ±0.5 Ω ±0.023 Ω/°C (±0.041 Ω/°F) 0.1 Ω ±0.
Chapter 1 Overview Hardware Features The RTD/resistance module contains a removable terminal block (spare part number 1769-RTBN18) providing connections for six 3-wire inputs for any combination of RTD and resistance input devices. Channels are wired as differential inputs. The illustration below shows the hardware features of the module.
Overview Chapter 1 General Diagnostic Features A single diagnostic indicator helps you identify the source of problems that may occur during powerup or during normal channel operation. The indicator shows both status and power. See Chapter 5, Diagnostics and Troubleshooting, for details on power-up and channel diagnostics. System Overview The modules communicate to the local controller or communication adapter through the 1769 bus interface.
Chapter 1 Overview Module Operation As shown in the block diagram below, each input channel of the module consists of an RTD/resistance connection that accepts excitation current; a sense connection that detects lead wire resistance; and a return connection. The signals are multiplexed to an A/D converter that reads the RTD or resistance value and the lead wire resistance.
Overview Chapter 1 Module Field Calibration The input module performs autocalibration when a channel is initially enabled. Autocalibration compensates for offset and gain drift of the A/D converter caused by temperature change within the module. An internal, high-precision, low drift voltage and system ground reference is used for this purpose. In addition, you can program the module to perform a calibration cycle once every 5 minutes.
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Chapter 2 Quick Start for Experienced Users Before You Begin This chapter can help you to get started using the 1769-IR6 module. We base the procedures here on the assumption that you have an understanding of Allen-Bradley controllers. You should understand electronic process control and be able to interpret the ladder logic instructions required to generate the electronic signals that control your application.
Chapter 2 Quick Start for Experienced Users 6. Monitoring module operation Step 1: Ensure that your 1769 system power supply(1) has sufficient current output to support your system configuration. Reference Chapter 3 (Installation and Wiring) The modules maximum current draw is shown below. TIP 5V DC 24V DC 100 mA 45 mA The module cannot be located more than 8 modules away from the 1769 system power supply.
Quick Start for Experienced Users Chapter 2 3 4 2 1 6 1 5 1. Check that the bus lever of the module to be installed is in the unlocked (fully right) position. 2. Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller). 3. Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other. 4. Push the bus lever back slightly to clear the positioning tab (3). Use your fingers or a small screwdriver. 5.
Chapter 2 Step 3: Quick Start for Experienced Users Wire the module. Reference Chapter 3 (Installation and Wiring) Follow the guidelines below when wiring the module. General · This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded.
Quick Start for Experienced Users Chapter 2 · Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1, for additional information. RTD Wiring Considerations · The module requires three wires to compensate for lead resistance error. · If using a 3-wire configuration for module connections, select cable to ensure that lead wire resistances match as closely as possible.
Chapter 2 Quick Start for Experienced Users The configuration file is typically modified using the programming software configuration screen as shown below. It can also be modified through the control program, if supported by the controller. See the configuration file chart on Configuration Data File on page 50. TIP Step 5: The configuration default is to enable an analog channel. For improved system performance, disable any unused channels. Go through the startup procedure.
Chapter 3 Installation and Wiring This chapter tells you how to: · · · · Compliance to European Union Directives determine the power requirements for the modules avoid electrostatic damage install the module wire the module’s terminal block This product is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.
Chapter 3 Installation and Wiring Low Voltage Directive This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 – Equipment Requirements and Tests. Power Requirements The module receives +5V DC and 24V DC power from the system power supply through the CompactBus interface. The maximum current drawn by the module is shown in the table below.
Installation and Wiring Chapter 3 Hazardous Location Considerations This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations. WARNING: EXPLOSION HAZARD · Substitution of components may impair suitability for Class I, Division 2. · Do not replace components or disconnect equipment unless power has been switched off or the area is known to be non-hazardous.
Chapter 3 Installation and Wiring Remove Power WARNING: Remove power before removing or inserting this module. When you remove or insert a module with power applied, an electrical arc may occur.
Installation and Wiring Chapter 3 Compact I/O Compact I/O Compact I/O Compact I/O Compact I/O Compact I/O 1 2 3 4 5 6 7 8 End Cap Compact I/O MicroLogix 1500 Controller with Integrated System Power Supply Compact I/O You can install as many modules as your power supply can support. However, all 1769 I/O modules have power supply distance rating.
Chapter 3 Installation and Wiring System Assembly The module can be attached to the controller or an adjacent I/O module before or after mounting. For mounting instructions, see Panel Mounting Using the Dimensional Template on page 34, or DIN Rail Mounting on page 35. To work with a system that is already mounted, see Replacing a Single Module within a System on page 35. The following procedure shows you how to assemble the Compact I/O system. 3 4 2 1 6 1 5 1. Disconnect power. 2.
Installation and Wiring Chapter 3 8. Lock the end cap bus terminator (6). A 1769-ECR or 1769-ECL right or left end cap respectively must be used to terminate the end of the bus. IMPORTANT Mounting ATTENTION: During panel or DIN rail mounting of all devices, be sure that all debris (metal chips, wire strands) is kept from falling into the module. Debris that falls into the module could cause damage at power up. Minimum Spacing Maintain spacing from enclosure walls, wireways, and adjacent equipment.
Chapter 3 Installation and Wiring Panel Mounting Mount the module to a panel using two screws per module. Use M4 or #8 panhead screws. Mounting screws are required on every module. Panel Mounting Using the Dimensional Template Right End Cap Compact I/O Compact I/O 122.6±0.2 (4.826±0.008) 28.5 (1.12) 35 (1.38) Compact I/O 132 (5.197) Host Controller For more than 2 modules: (number of modules-1) X 35 mm (1,38 in.). Refer to host controller documentation for this dimension.
Installation and Wiring Chapter 3 DIN Rail Mounting The module can be mounted using the following DIN rails: · 35 x 7.5 mm (EN 50 022 - 35 x 7.5), or · 35 x 15 mm (EN 50 022 - 35 x 15). Before mounting the module on a DIN rail, close the DIN rail latches. Press the DIN rail mounting area of the module against the DIN rail. The latches will momentarily open and lock into place. Replacing a Single Module within a System The module can be replaced while the system is mounted to a panel (or DIN rail).
Chapter 3 Installation and Wiring Field Wiring Connections System Wiring Guidelines Consider the following when wiring your system: General · This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. · Channels are isolated from one another by ±10V DC maximum.
Installation and Wiring Chapter 3 RTD Wiring Considerations Since the operating principle of the RTD module is based on the measurement of resistance, take special care when selecting your input cable. For 2-wire or 3-wire configurations, select a cable that has a consistent impedance throughout its entire length. IMPORTANT The RTD module requires three wires to compensate for lead resistance error.
Chapter 3 Installation and Wiring Removing and Replacing the Terminal Block When wiring the module, you do not have to remove the terminal block. If you remove the terminal block, use the write-on label located on the side of the terminal block to identify the module location and type. SLOT # _____ MODULE TYPE ______ To remove the terminal block, loosen the upper and lower retaining screws. The terminal block will back away from the module as you remove the screws.
Installation and Wiring Chapter 3 Wiring the Finger-Safe Terminal Block When wiring the terminal block, keep the finger-safe cover in place. TIP If you need to remove the finger-safe cover, insert a screwdriver into one of the square, wiring holes and gently pry the cover off. If you wire the terminal block with the finger-safe cover removed, you will not be able to put it back on the terminal block because the wires will be in the way. 1. Loosen the terminal screws to be wired. 2.
Chapter 3 Installation and Wiring After the module is properly installed, follow the wiring procedure below and the RTD and potentiometer wiring diagrams on pages 3-41…3-43. To ensure proper operation and high immunity to electrical noise, always use Belden shielded, twisted-pair or equivalent wire.
Installation and Wiring Chapter 3 7. Repeat steps 1…6 for each channel on the module. Wiring RTDs Three types of RTDs can be connected to the 1769-IR6 module: · 2-wire RTD, which is composed of an RTD EXC (excitation) lead wire and a RTN (return) lead wire · 3-wire RTD, which is composed of a Sense and 2 RTD lead wires (RTD EXC and RTN) · 4-wire RTD, which is composed of a Sense and 2 RTD lead wires (RTD EXC and RTN). The second sense wire from the 4-wire RTD is left open.
Chapter 3 Installation and Wiring 4-Wire RTD Configuration Cable Shield (to Ground) EXC 3 RTD EXC SENSE 3 RTN 3 EXC 4 RTD EXC Sense Sense Return Return Belden 83503 or 9533 Shielded Cable Leave one sensor wire open. Wiring Resistance Devices (Potentiometers) Potentiometer wiring requires the same type of cable as that for the RTDs described on page 3-37. Potentiometers can be connected to the module as a 2-wire or 3-wire connection as shown on page 3-42.
Installation and Wiring Chapter 3 3-Wire Potentiometer Interconnection EXC 3 SENSE 3 RTN 3 Run RTD and sense wires from the module to Cable Shield (to Ground) potentiometer terminal and tie terminal to one poin Potentiometer RTD EXC Sense Return Belden 83503 or 9533 Shielded Cable Run RTD and sense wires from the module to Cable Shield (to Ground) potentiometer terminal and tie terminal to one poin EXC 3 SENSE 3 RTN 3 RTD EXC Potentiometer Sense Return Belden 83503 or 9533 Shielded Cable TIP The po
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Chapter 4 Module Data, Status, and Channel Configuration After installation of the 1769-IR6 RTD/resistance input module, you must configure it for operation, usually using the programming software compatible with the controller (for example, RSLogix 500™ or RSLogix 5000™). Once configuration is complete and reflected in ladder logic, you will need to get the module up and running and then verify its operation.
Chapter 4 Module Data, Status, and Channel Configuration Input Image The input image file represents data words and status words. Input words 0…5 hold the input data that represents the value of the analog inputs for channels 0…5. These data words are valid only when the channel is enabled and there are no errors. Input words 6 and 7 hold the status bits. To receive valid status information, the channel must be enabled.
Module Data, Status, and Channel Configuration Input Data File Chapter 4 The input data table lets you access RTD input module read data for use in the control program, via word and bit access. The data table structure is shown in table below.
Chapter 4 Module Data, Status, and Channel Configuration General Status Flag Bits (S0…S5) Bits S0…S5 of word 6 contain the general status information for channels 0…5, respectively. This bit is set (1) when an error (over- or under-range, short-circuit, open-circuit, or input data not valid) exists for that channel. The error conditions of the General Status bits are logically ORed.
Module Data, Status, and Channel Configuration Chapter 4 Open-Circuit Flag Bits (OC0…OC5) Bits OC0…OC5 of word 6 contain open-circuit error information for channels 0…5, respectively. For an RTD input, the bits indicate either an opencircuit or short-circuit condition when set (1). For a resistance input, the bits indicate an open-circuit when set (1). TIP Short-circuit detection for direct resistance inputs is not indicated because 0 is a valid number.
Chapter 4 Module Data, Status, and Channel Configuration Configuring Channels After module installation, you must configure operation details, such as RTD type and temperature units, for each channel. Channel configuration data for the module is stored in the controller configuration file, which is both readable and writable. Configuration Data File The configuration data file is shown below. Bit definitions are provided in Channel Configuration on page 51.
Module Data, Status, and Channel Configuration Chapter 4 The following table shows the basic arrangement of the configuration data file.
Chapter 4 Module Data, Status, and Channel Configuration Table 7 - Channel Configuration Bit Definitions To Select Make these bit settings 15 Filter Frequency 10 Hz 14 13 12 11 10 9 8 7 6 5 4 2 1 1 1 0 0 60 Hz 0 0 0 50 Hz 0 0 1 250Hz 0 1 1 500 Hz 1 0 0 1 kHz 1 0 1 Excitation Current 1.0 mA Cyclic Lead Compensation Enable 0 Disable 1 0 0.
Module Data, Status, and Channel Configuration Chapter 4 Table 7 - Channel Configuration Bit Definitions To Select Make these bit settings 15 Data Format Enable/Disable Channel Raw/Proportional 14 0 13 0 12 0 Engineering Units 0 0 1 Engr. Units X 10 1 0 0 Scaled-for-PID 0 1 0 Percent Range 0 1 1 Enable Disable 11 10 9 8 7 6 5 4 3 2 1 0 1 0 (1) Ignored for a resistance device input. (2) Valid only with the 0.5 mA excitation current. (3) Valid only with the 1.
Chapter 4 Module Data, Status, and Channel Configuration Selecting Data Format (Bits 12…14) Bits 12…14 of the channel configuration word are used to indicate the input data format. You may choose any of the following formats: · · · · · raw/proportional engineering units x 1 engineering units x 10 scaled for PID percent of full scale TIP The engineering units data formats represent real temperature or resistance engineering units provided by the module.
Module Data, Status, and Channel Configuration Chapter 4 Raw/Proportional Data Format The raw/proportional data format provides the greatest resolution of all the data formats. For this format, the value presented to the controller is proportional to the selected input. It is also scaled to the maximum data range allowed by the bit resolution of the A/D converter and selected filter frequency.
Chapter 4 Module Data, Status, and Channel Configuration Scaling Examples EXAMPLE Scaled-for-PID to Engineering Units x1 · input type = 200 Ω Platinum RTD · α = 0.00385 °C · range = -200…850 °C SLOW = -200 °C SHIGH = 850 °C · channel data = 3421(scaled-for-PID) Engineering Units Equivalent = SLOW + [SHIGH - SLOW) x (channel data/16383)] Engineering Units Equivalent = -200 °C + [(850 °C -(-200 °C)) x (3421/16383)] = 19.
Module Data, Status, and Channel Configuration Chapter 4 Engineering Units x 1 Data Format If you select engineering units x 1 as the data format for an RTD input, the module scales input data to the actual temperature values for the selected RTD type per RTD standard. It expresses temperatures in 0.1 °C units. For resistance inputs, the module expresses resistance in 0.1 Ω units, for all ranges except the 150 Ω range. For the latter, resistance is expressed in 0.01 Ω units.
Chapter 4 Module Data, Status, and Channel Configuration Linear Relationship Between Temperature and PID Counts Counts +16383 °C -200 ˚C +850 ˚C The amount over and under user range (full-scale range -410…16793) is also included in the signed integer provided to the controller. Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their PID equations. See Determining Effective Resolution and Range on page 65.
Module Data, Status, and Channel Configuration Chapter 4 Percent of Full Scale Data Format With the percent of full scale data format, the module presents input data to the user as a percent of the user-specified range. For example, for a 100 Ω platinum 385 RTD, the range -200 °C…850 °C is represented as 0 percent to 100 percent. See Determining Effective Resolution and Range on page 65.
Chapter 4 Module Data, Status, and Channel Configuration corresponding channel. When it detects an open circuit or a short circuit, the module overrides the actual input data with the value that you specify. Table 9 - Open/Broken Circuit Response Definitions Open/Broken Circuit Value Response Definition Upscale Sets input to full upper scale value of channel data word. The full-scale value is determined by the selected input type, data format, and scaling.
Module Data, Status, and Channel Configuration Chapter 4 Setting Filter Frequency (Bits 0…2) The module supports filter selections corresponding to filter frequencies of 10 Hz, 50 Hz, 60 Hz, 250 Hz, 500 Hz, and 1 kHz. Your filter frequency selection is determined by the desired range for the input type, and the required effective resolution, which indicates the number of bits in the channel configuration word that do not vary due to noise.
Chapter 4 Module Data, Status, and Channel Configuration Channel Step Response Another module characteristic determined by filter frequency is channel step response, as shown in the following table. The step response is the time required for the analog input signal to reach 100 percent of its expected final value, given a full-scale step change in the input signal. Thus, if an input signal changes faster than the channel step response, a portion of that signal will be attenuated by the channel filter.
Module Data, Status, and Channel Configuration Chapter 4 Channel Cutoff Frequency The channel cutoff frequency (-3 dB) is the point on the input channel frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation. The following table shows cutoff frequencies for the supported filters. Table 11 - Filter Frequency versus Channel Cutoff Frequency Filter Frequency Channel Cutoff Frequency 10 Hz 2.62 Hz 50 Hz 13.1 Hz 60 Hz 15.7 Hz 250 Hz 65.
Chapter 4 Module Data, Status, and Channel Configuration Frequency Response Graphs 10 Hz Input Filter Frequency 50 Hz Input Filter Frequency 0 –3 dB –20 –20 –40 –40 –60 –60 –80 –80 Gain (dB) Gain (dB) 0 -100 -120 -100 -120 -140 -140 -160 -160 -180 -180 - 200 - 200 0 10 30 20 50 40 60 0 Frequency (Hz) 2.62 Hz –3 dB 50 13.
Module Data, Status, and Channel Configuration Chapter 4 Selecting Enable/Disable Cyclic Autocalibration (Word 6, Bit 0) Configuration word 6, bit 0 lets you configure the module to perform an autocalibration cycle of all enabled channels once every 5 minutes. Cyclic calibration functions to reduce offset and gain drift errors due to temperature changes within the module. Setting this bit to 1 disables cyclic calibration, the default (0) enables the autocalibration function.
Chapter 4 Module Data, Status, and Channel Configuration Table 12 - Effective Resolution and Range for 10 Hz Filter Frequency °C °F °C °F Resolution °C °F Decimal Range °F Resolution Scaled for PID Over Full Percent of Full Scale Range 0…100% Decimal Range °C Resolution Engineering Units x 10 Over Full Range Decimal Range Resolution Engineering Units x 1 Over Full Range Decimal Range Input Type Decimal Range Raw/Proportional Data Over Full Input Range Resolution °C °F 0.1 °C / 1 0.
Module Data, Status, and Channel Configuration Chapter 4 Table 13 - Effective Resolution and Range for 50-60 Hz Filter Frequency °C °F °C °F Resolution °C °F Decimal Range °F Resolution Scaled for PID Over Full Percent of Full Scale Range 0 … 100% Decimal Range °C Resolution Engineering Units x 10 Over Full Range Decimal Range Resolution Engineering Units x 1 Over Full Range Decimal Range Raw/Proportional Data Over Full Input Range Decimal Range Input Type Resolution °C °F -200 … 850
Chapter 4 Module Data, Status, and Channel Configuration Table 14 - Effective Resolution and Range for 250 Hz Filter Frequency °C °F °C °F Resolution °C °F Decimal Range °F Resolution Scaled for PID Over Full Percent of Full Scale Range 0 … 100% Decimal Range °C Resolution Engineering Units x 10 Over Full Range Decimal Range Resolution Engineering Units x 1 Over Full Range Decimal Range Raw/Proportional Data Over Full Input Range Decimal Range Input Type Resolution °C °F 1.0 °C / 1 1.
Module Data, Status, and Channel Configuration Chapter 4 Table 15 - Effective Resolution and Range for 500 Hz Filter Frequency Resolution °C °F °C °F Resolution °C °F Percent of Full Scale 0 … 100% Decimal Range °F Resolution Scaled for PID Over Full Range Decimal Range °C Engineering Units x 10 Over Full Range Decimal Range Resolution Engineering Units x 1 Over Full Range Decimal Range Input Type Decimal Range Raw/Proportional Data Over Full Input Range Resolution °C °F -2000 … 8500
Chapter 4 Module Data, Status, and Channel Configuration Table 16 - Effective Resolution and Range for 1 kHz Filter Frequency °C °F °C °F Resolution °C °F Percent of Full Scale 0 … 100% Decimal Range °F Resolution Decimal Range °C Resolution Engineering Units x 10 Scaled for PID Over Full Over Full Range Range Decimal Range Resolution Engineering Units x 1 Over Full Range Decimal Range Raw/Proportional Data Over Full Input Range Decimal Range Input Type Resolution °C °F -2000 … 8500 1
Module Data, Status, and Channel Configuration Chapter 4 The table below identifies the number of significant bits used to represent the input data for each available filter frequency. The number of significant bits is defined as the number of bits that will have little or no jitter due to noise, and is used in defining the effective resolution. Note that the resolutions provided by the filters apply to the raw/proportional data format only.
Chapter 4 Module Data, Status, and Channel Configuration Determining Module Update Time The module update time is defined as the time required for the module to sample and convert the input signals of all enabled input channels and provide the resulting data values to the processor. The module sequentially samples the channels in a continuous loop as shown below.
Module Data, Status, and Channel Configuration Chapter 4 Module update time can be calculated by obtaining the sum of all enabled channel update times. Channel update times include channel scan time, channel switching time, and reconfiguration time. EXAMPLE 1. Module Update Time with all channels enabled and configured with 10Hz filter = 6 x 303 ms = 1818 ms 2.
Chapter 4 Module Data, Status, and Channel Configuration Table 19 - Calibration Steps and Their Affect on Module Update Time Calibration Step Calibration Time (ms) Step 1 RTD ADC zero 73 ms Step 2 RTD ADC span 106 ms Step 3 RTD system zero 73 ms Step 4 RTD ADC wire zero 73 ms Step 5 RTD ADC wire span 106 ms Step 6 system wire zero 73 ms Current Source Calibration Calibration Time (ms) Current source zero 73 ms Current source gain 106 ms Current source resistor calibration 303 ms Tabl
Module Data, Status, and Channel Configuration EXAMPLE Chapter 4 Two Channels Enabled Using the Same Input Class with Cyclic Calibration Enabled Channel 0 Input: 100 Ω Platinum 385, 1.0 mA source (Class 2) with 60 Hz filter Channel 1 Input: 1000 Ω resistance, 0.5 mA source (Class 2) with 60 Hz filter From Table 18, Channel Update Time versus Filter Frequency, on page 4-72: 1. Calculate Module Update Time without an Autocalibration Cycle = Ch 0 Update Time + Ch 1 Update Time = 53 ms + 53 ms = 106 ms 2.
Chapter 4 Module Data, Status, and Channel Configuration Effects of Cyclic Lead Wire Compensation on Module Update Time The 1769-IR6 module provides the option to enable lead wire compensation for each channel. This feature improves measurement accuracy for 3- and 4wire RTDs by compensating for the resistance of the RTD lead wire.
Module Data, Status, and Channel Configuration Chapter 4 Calculating Module Update Time with Cyclic Lead Wire Compensation Enabled The following example illustrates how to determine module update time with cyclic lead wire compensation enabled.
Chapter 4 Module Data, Status, and Channel Configuration Impact of Autocalibration and Lead Wire Compensation on Module Startup Regardless of the selection of the Enable/Disable Cyclic Calibration and Enable/Disable Cyclic Lead Calibration functions, an cycle of both of these functions occurs automatically on a mode change from Program-to-Run and on subsequent module startups/initialization for all configured channels.
Module Data, Status, and Channel Configuration Effects of Autocalibration on Accuracy Chapter 4 The module performs autocalibration to correct for drift errors over temperature. Autocalibration occurs immediately following configuration of a previously unselected channel, during power cycle of enable channels and every 5 minutes if so configured. The table below shows module accuracy with and without calibration.
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Chapter 5 Diagnostics and Troubleshooting This chapter describes module troubleshooting, containing information on: · · · · · · Safety Considerations safety considerations when troubleshooting module versus channel operation the module’s diagnostic features critical versus non-critical errors module condition data contacting Rockwell Automation for assistance Safety considerations are an important element of proper troubleshooting procedures.
Chapter 5 Diagnostics and Troubleshooting Stand Clear of the Equipment When troubleshooting any system problem, have all personnel remain clear of the equipment. The problem could be intermittent, and sudden unexpected machine motion could occur. Have someone ready to operate an emergency stop switch in case it becomes necessary to shut off power.
Diagnostics and Troubleshooting Power-up Diagnostics At module power-up, a series of internal diagnostic tests are performed. These diagnostic tests must be successfully completed or the module status indicator remains off and a module error results and is reported to the controller. Module Status Indicator Channel Diagnostics Chapter 5 Condition Corrective Action On Proper Operation No action required. Off Module Fault Cycle power. If condition persists, replace the module.
Chapter 5 Diagnostics and Troubleshooting Open-Wire or Short-Circuit Detection The module performs an open-circuit or short-circuit input test on all enabled channels on each scan. Whenever an open-circuit or short-circuit condition occurs, the broken input bit for that channel is set in input data word 6.
Diagnostics and Troubleshooting Chapter 5 Module Error Field The purpose of the module error field is to classify module errors into three distinct groups, as described in the table below. The type of error determines what kind of information exists in the extended error information field. These types of module errors are typically reported in the controller’s I/O status file. Refer to your controller manual for details.
Chapter 5 Diagnostics and Troubleshooting Extended Error Information Field Check the extended error information field when a non-zero value is present in the module error field. Depending upon the value in the module error field, the extended error information field can contain error codes that are modulespecific or common to all 1769 analog modules. TIP If no errors are present in the module error field, the extended error information field will be set to zero.
Diagnostics and Troubleshooting Error Codes Chapter 5 The table below explains the extended error code.
Chapter 5 Diagnostics and Troubleshooting Table 24 - Extended Error Codes Error Type Module Specific Configuration Error Hex Equivalent(1) Module Error Code Extended Error Error Description Information Code Binary Binary X400 010 0 0000 0000 General configuration error; no additional information X401 010 0 0000 0001 Invalid input filter selected (channel 0) X402 010 0 0000 0010 Invalid input filter selected (channel 1) X403 010 0 0000 0011 Invalid input filter selected (channel 2) X
Diagnostics and Troubleshooting Contacting Rockwell Automation Chapter 5 If you need to contact Rockwell Automation for assistance, please have the following information available when you call: · a clear statement of the problem, including a description of what the system is actually doing. Note the indicator state; also note input and output image words for the module. · a list of remedies you have already tried · processor type and firmware number (See the label on the processor.
Chapter 5 Diagnostics and Troubleshooting Notes: 90 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
Appendix A Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 Module Addressing The module uses eight input words for data and status bits (input image), and seven configuration words.
Compact I/O Compact I/O 0 1 2 3 End Cap Compact I/O Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 MicroLogix 1500 Appendix A Slot Number TIP The end cap does not use a slot address. 1769-IR6 Configuration File The configuration file contains information you use to define the way a specific channel functions. The configuration file is explained in more detail in Configuring Channels on page 50.
Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 Configuring the 1769-IR6 in a MicroLogix 1500 System Appendix A This example takes you through configuring your 1769-IR6 RTD/resistance input module with RSLogix 500 programming software, assumes your module is installed as expansion I/O in a MicroLogix 1500 system, and that RSLinx™ is properly configured and a communications link has been established between the MicroLogix processor and RSLogix 500.
Appendix A Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 A communications dialog appears, identifying the current communications configuration so that you can verify the target controller. If the communication settings are correct, click on Read IO Config. The actual I/O configuration will be displayed. The 1769-IR6 module is installed in slot 1. To configure the module, doubleclick on the module/slot. The general configuration screen appears.
Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 Appendix A Configuration options for channels 0…2 are located on a separate tab from channels 3…5, as shown below. To enable a channel, click its Enable box so that a check mark appears in it. For optimum module performance, disable any channel that is not hardwired to a real input. Then, choose your Data Format, Input Type, Filter Frequency, Open Circuit response, and Units for each channel.
Appendix A Module Addressing and Programming with MicroLogix 1500 and RSLogix 500 Generic Extra Data Configuration This tab redisplays the configuration information entered on the Analog Input Configuration screen in a raw data format. You have the option of entering the configuration using this tab instead of the module Configuration tab. You do not have to enter data in both places.
Appendix B Configuring the 1769-IR6 RTD Module with the Generic Profile The following is used only when your 1769-IR6 RTD Input module profile is not available in RSLogix 5000 programming software. To configure a 1769-IR6 module for a CompactLogix Controller using RSLogix 5000 software with the Generic Profile, first begin a new project in RSLogix 5000 software. Click on the new project icon or on the FILE pulldown menu and select NEW.
Appendix B Configuring the 1769-IR6 RTD Module with the Generic Profile Choose your controller type and enter a name for your project, then click OK. The following main RSLogix 5000 screen appears: The last entry in the Controller Organizer on the left of the screen shown above is a line labeled “[0] CompactBus Local”.
Configuring the 1769-IR6 RTD Module with the Generic Profile Appendix B This screen narrows your search for I/O modules to configure into your system. With the initial release of the CompactLogix5320 controller, this screen only includes the “Generic 1769 Module”. Click the OK button and the following default Generic Profile screen appears: This is the default Generic Profile screen. First, select the Comm Format (“Input Data – INT” for the 1769-IR6), then fill in the name field.
Appendix B Configuring the 1769-IR6 RTD Module with the Generic Profile Note the Assembly Instance numbers and their associated sizes for the 1769IR6 module and enter them into the Generic Profile. The Generic Profile for a 1769-IR6 should look like the following: Click “Finish” to complete the configuration of your I/O module. Configure each RTD Input module in this manner. The CompactLogix5320 controller supports a maximum of eight I/O modules.
Configuring the 1769-IR6 RTD Module with the Generic Profile Appendix B For demonstration purposes, a Generic Profile has been created for 1769- IR6 module. The Controller Tags screen looks like the following: Tag addresses are automatically created for configured I/O modules. All local I/O addresses are preceded by the word Local. These addresses have the following format: · Input Data: Local:s:I · Configuration Data: Local:s:C Where s is the slot number assigned the I/O modules in the Generic Profiles.
Appendix B Configuring the 1769-IR6 RTD Module with the Generic Profile Configuring a 1769-IR6 RTD Input Module To configure the 1769-IR6 module in slot 1, click on the plus sign left of Local:1:C. Configuration data is entered under the Local:1:C.Data tag. Click the plus sign to the left of Local:1:C.Data to reveal the 8 integer data words where configuration data may be entered for the 1769-IR6 module. The tag addresses for these 8 words are Local:1:C.Data[0]…Local:1:C.Data[7].
Appendix C Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter This application example assumes your 1769-IR6 RTD/resistance input module is in a remote DeviceNet system controlled by a 1769-ADN DeviceNet adapter. RSNetworx for DeviceNet is not only used to configure your DeviceNet network, but is also used to configure individual I/O modules in remote DeviceNet adapter systems.
Appendix C Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter Start RSNetworx for DeviceNet. The following screen appears: In the left column under Category, click on the “+” sign next to Communication Adapters. In the list of products under Communication Adapters is the 1769-ADN/A. Should this adapter not appear under Communication Adapters, your RSNetworx for DeviceNet software is not version 3.00 or later.
Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter Appendix C To configure I/O for the adapter, double-click on the adapter that you just placed on the network and the following screen appears: At this point you may modify the adapters DeviceNet node address, if desired.
Appendix C Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter Next, click on the I/O Bank 1 Configuration tab. The following screen appears: Configuring the 1769-IR6 The 1769-ADN appears in slot 0. Your I/O modules, power supplies, end cap and interconnect cables must be entered in the proper order, following the 1769 I/O rules contained in the 1769-ADN user manual. In this example, we place the 1769-IR6 in slot 1 to show how it is configured.
Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter Appendix C By default, the 1769-IR6 module contains eight input words and no output words. Click on the “Data Description…” button. This shows what the eight input words represent, that is the first six words are the actual RTD input data, while the following two words contain status, open-circuit bits and over- and under-range bits for the six channels.
Appendix C Configuring the 1769-IR6 Module in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter Temperature Units is ignored for the resistance device inputs for channels 4 and 5. However, Engineering Units x 10 is used for these channels to receive actual resistance in ohms in the tag database. The Excitation Current for channels 4 and 5 must be 0.5mA. The Open-Circuit Selection is Upscale.
D Appendix Two’s Complement Binary Numbers The processor memory stores 16-bit binary numbers. Two’s complement binary is used when performing mathematical calculations internal to the processor. Analog input values from the analog modules are returned to the processor in 16-bit two’s complement binary format. For positive numbers, the binary notation and two’s complement binary notation are identical.
Appendix D Two’s Complement Binary Numbers Negative Decimal Values In two’s complement notation, the far left position is always 1 for negative values. The equivalent decimal value of the binary number is obtained by subtracting the value of the far left position, 32768, from the sum of the values of the other positions. In the figure below (all positions are 1), the value is 32767 - 32768 = -1.
Glossary The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here refer to the Industrial Automation Glossary, publication AG-7.1. A/D Converter– Refers to the analog to digital converter inherent to the module. The converter produces a digital value whose magnitude is proportional to the magnitude of an analog input signal. attenuation – The reduction in the magnitude of a signal as it passes through a system.
Glossary data word – A 16-bit integer that represents the value of the input channel. The channel data word is valid only when the channel is enabled and there are no channel errors. When the channel is disabled the channel data word is cleared (0). dB – (decibel) A logarithmic measure of the ratio of two signal levels. digital filter – A low-pass filter incorporated into the A/D converter.
Glossary linearity error – Any deviation of the converted input or actual output from a straight line of values representing the ideal analog input. An analog input is composed of a series of input values corresponding to digital codes. For an ideal analog input, the values lie in a straight line spaced by inputs corresponding to 1 LSB. Linearity is expressed in percent full-scale input. See the variation from the straight line due to linearity error (exaggerated) in the example below.
Glossary resolution – The smallest detectable change in a measurement, typically expressed in engineering units (such as 1 °C) or as a number of bits. For example a 12-bit system has 4096 possible output states. It can therefore measure 1 part in 4096. RTD – Resistance temperature detector. A temperature-sensing device that consists of a temperature-sensing element connected by two, three, or four lead wires that provide input to the module.
Index A A/D definition 111 A/D converter 18, 53 abbreviations 111 accuracy autocalibration 79 module 79 overall 14 resistance device 15 addressing 45, 91 analog input module overview 81 attenuation 63 definition 111 autocalibration 65, 79 B before you begin 21 broken input detection 84 downscale 60 last state 60 upscale 60 zero 60 bus connector definition 111 locking 32 movable 16 stationary 16 bus interface 17 bus lever 16 C calibration 65, 79 channel 18 definition 111 channel cutoff frequency 61, 63 cha
Index engineering units x 10 57 equipment required for installation 21 error codes 87 error definitions 84 errors configuration 86 critical 84 extended error information field 86 hardware 86 module error field 85 non-critical 84 European Union Directives 27 excitation connections 18 excitation current 18, 60 definition 112 extended error codes 87 extended error information field 86 F fault condition at power-up 17 filter definition 112 filter frequency 61, 63, 71, ??-79 and autocalibration 79 and channel
Index operation system 17 out-of range detection 83 overall accuracy definition 113 over-range flag bits 49 P panel mounting 34 percent of full scale 59 periodic calibration 65, 79 PID 57 positive decimal values 109 power-up diagnostics 83 power-up sequence 17 program alteration 82 programming software 45 R range 1 kHz 70 10 Hz 66 250 Hz 68 500 Hz 69 50-60 Hz 67 raw/proportional 55 reconfiguration time 73 register configuration 45, 91 data, status 45, 91 removing terminal block 38 replacing a module 35 r
Index Notes: 118 Rockwell Automation Publication 1769-UM005B-EN-P - March 2012
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