CompactBlock LDX Analog Modules 1790D-N4CO/TN4CO, -N4VO/TN4VO, -NOC2/TNOC2, -NOV2/TNOV2, 1790P-TN4CO, -TNOC2 User Manual
Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.
Rockwell Automation Support Before you contact Rockwell Automation for technical assistance, we suggest you please review the troubleshooting information contained in this publication first. If the problem persists, call your local distributor or contact Rockwell Automation in one of the following ways: Phone Internet United States/Canada 1.440.646.5800 Outside United States/Canada You can access the phone number for your country via the Internet: 1. Go to http://www.ab.com 2.
Preface Read this preface to familiarize yourself with the rest of the manual. This preface covers the following topics: • • • • • who should use this manual how to use this manual related publications conventions used in this manual Rockwell Automation support Who Should Use This Manual Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Allen-Bradley CompactBlock LDX modules.
Preface 2 Related Documentation The table below provides a listing of publications that contain important information about CompactBlock LDX systems.
Table of Contents Chapter 1 Overview How to Use Analog I/O . . . . . . General Description . . . . . . . . . Hardware Features. . . . . . . . General Diagnostic Features . System Overview . . . . . . . . . . . System Operation . . . . . . . . Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents ii Chapter 3 Module Data, Status, and Channel Configuration for Analog Input Modules Analog Input Image . . . . . . . . . . . . . . . . . . . . . . . . . . Analog Input Data File . . . . . . . . . . . . . . . . . . . . . . . . Analog Input Data File With Discrete Input Expansion Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog Input Data Format . . . . . . . . . . . . . . . . . . . . . . . . Configuring Analog Input Module . . . . . . . . . . . . . . .
Table of Contents iii Appendix B PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . Prevent Electrostatic Discharge . . . . . . . . . . . . . . . Environment and Enclosure . . . . . . . . . . . . . . . . . Remove Power . . . . . . . . . . . . . . . . . . . . . . . . . . General Considerations . . . . . . . . . . . . . . . . . . . .
Table of Contents iv Publication 1790-UM001A-EN-P - March 2002
Chapter 1 Overview This chapter explains how analog data is used, and describes CompactBlock LDX analog input and output modules. Included is information about: • • • • How to Use Analog I/O the use of analog I/O the modules’ hardware and diagnostic features an overview of the analog input system operation an overview of the analog output system operation Analog refers to the representation of numerical quantities by the measurement of continuous physical variables.
1-2 Overview General Description The analog input module converts and digitally stores analog data for retrieval by controllers, such as the SLC-500 programmable controller. The module supports connections from any combination of up to four voltage or current analog sensors. The four high-impedance input channels can be wired as single-ended inputs. The output module provides two single-ended analog output channels, either voltage or current, depending on the module selected. Table 1.
Overview 1-3 Hardware Features The modules contain either removable D-shell connectors or fixed terminal blocks. The CompactBlock LDX four input channels are single-ended. The CompactBlock LDX two output channels are also single-ended. Module configuration is normally done via the controller’s programming software. In addition, some controllers support configuration via the user program. Figure 1.1 shows the CompactBlock LDX analog modules’ hardware features. Figure 1.
1-4 Overview General Diagnostic Features The CompactBlock LDX modules contain diagnostic features that can help you identify the source of problems that may occur during power-up or during normal channel operation. These power-up and channel diagnostics are explained in Chapter 5, Module Diagnostics and Troubleshooting. System Overview The modules communicate to the controller through the DeviceNet network. Module power is derived from DeviceNet.
Overview 1-5 Module Operation Input Module The input module’s input circuitry consists of four analog inputs multiplexed into a single analog-to-digital (A/D) converter. The A/D converter reads the selected input signal and converts it to a digital value that is presented to the network. The multiplexer sequentially switches each input channel to the module’s A/D converter. Figure 1.2 on page 1-5 shows a block diagram of the circuitry. Figure 1.
1-6 Overview Output Module The output module uses a digital-to-analog (D/A) converter to read the digital output data from the network and convert it to an analog output signal. Figure 1.3 below shows a block diagram of the circuitry. Figure 1.
Chapter 2 Installation and Wiring This chapter tells you how to: • • • • • • Power Requirements determine the power requirements for the modules avoid electrostatic damage install the module wire the module’s terminal block wire input devices wire output devices The modules receive power through the DeviceNet network and from an auxilary 24V dc field supply. The maximum power drawn by the modules is shown in Table 2.1. Table 2.
2-2 Installation and Wiring Prevent Electrostatic Discharge ATTENTION ! Electrostatic discharge can damage integrated circuits or semiconductors if you touch analog I/O module bus connector pins or the terminal block on the input module. Follow these guidelines when you handle the module: • • • • • • Touch a grounded object to discharge static potential. Wear an approved wrist-strap grounding device. Do not touch the bus connector or connector pins. Do not touch circuit components inside the module.
Installation and Wiring 2-3 Remove Power ATTENTION ! General Considerations Remove power before removing or inserting this module or an expansion module. When you remove or insert a module with power applied, an electrical arc may occur.
2-4 Installation and Wiring Installing CompactBlock LDX I/O Follow these steps to install the block: 1. Set the Node Address on the Base Block 2. Mount the Base Block 3. Mount the Optional Expansion Blocks 4. Connect the DeviceNet Cable Set the Node Address on the Base Block Each base block comes with its internal program set for node address 63. To reset the node address, adjust the switches on the front of the block. The two switches are most significant digit (MSD) and least significant digit (LSD).
Installation and Wiring 2-5 Mount the Base Block You can mount the base block to a panel or DIN rail. We recommend that you ground the panel or DIN rail before mounting the block. IMPORTANT WARNING ! The analog base module can accommodate a maximum of two discrete expansion modules. When used in a Class I, Division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes. Panel Mounting 1.
2-6 Installation and Wiring DIN Rail Mounting 1. Hook the top of slot of the block over the DIN Rail. 2. Pull down on the locking lever while pressing the block against the rail. f Locking Lever 3. Push up on the locking lever to secure the block to the rail when block is flush against the rail. Mount the Optional Expansion Blocks Mount the expansion block by connecting it to a previously-installed CompactBlock LDX I/O base or expansion block.
Installation and Wiring 2-7 Connect the DeviceNet Cable Follow these procedures when connecting the DeviceNet cable to the base block. The required DeviceNet connector is not supplied with the block you must purchase it separately.
2-8 Installation and Wiring I/O System Wiring Guidelines Consider the following when wiring your system: General • All module commons (COM) are connected in the analog module. The analog common (COM) is not connected to earth ground inside the module. • Channels are not isolated from each other. • Do not use the analog module’s NC terminals as connection points. • To ensure optimum accuracy, limit overall cable impedance by keeping your cable as short as possible.
Installation and Wiring 2-9 Effect of Transducer/Sensor and Cable Length Impedance on Voltage Input Accuracy For voltage inputs, the length of the cable used between the transducer/sensor and the module can affect the accuracy of the data provided by the module.
2-10 Installation and Wiring For example, for Belden 8761 two conductor, shielded cable: Rc = 16 Ω/1000 ft Rs = 0 (ideal source) Vin % Ai = 1 – --------- × 100 Vs Table 2.2 Effect of Cable Length on Input Accuracy Length of Cable (m) dc resistance of the cable, Rc (Ω) 50 2.625 0.00105% 100 5.25 0.00210% 200 10.50 0.00420% 300 15.75 0.
Installation and Wiring 2-11 Effect of Device and Cable Output Impedance on Output Module Accuracy The maximum value of the output impedance is shown in the example below, because it creates the largest deviation from an ideal voltage source. Rs Rc ++ Vs Vload RiRload - – Rc Rc 43266 Where: Rc = DC resistance of the cable (each conductor) depending on cable length Rs = Source impedance of 1790D-NOV2/TNOV2 (0.
2-12 Installation and Wiring Table 2.3 Effect of Output Impedance and Cable Length on Accuracy Length of Cable (m) dc resistance of the cable, Rc (Ω) 1 Accuracy impact at the load 1,000Ω 10,000Ω 100,000Ω 0.0525 0.0605% 0.00605% 0.000605% 10 0.525 0.155% 0.0155% 0.00155% 50 2.625 0.575% 0.0575% 0.00575% 100 5.25 1.1% 0.11% 0.011% As output impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases.
Installation and Wiring 2-13 Wiring the Modules ATTENTION ! To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the system power supply and from any other source to the analog module. After the analog module is properly installed, follow the wiring procedure below. To ensure proper operation and high immunity to electrical noise, always use Belden™ 8761 (shielded, twisted-pair) or equivalent wire.
2-14 Installation and Wiring To wire your module follow these steps. 1. At each end of the cable, strip some casing to expose the individual wires. 2. Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5 mm) of insulation away to expose the end of the wire. ATTENTION Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up. ! 3. At one end of the cable, twist the drain wire and foil shield together.
Installation and Wiring 2-15 1790D-N4C0, 1790D-N4V0 Analog 4 Input Base D-Shell Modules Wiring Table 2.4 lists the module pin descriptions. Figure 2.2 and Figure 2.3 show how to wire each module. Table 2.
2-16 Installation and Wiring 1790D-TN4C0, 1790D-TN4V0 Analog 4 Input Base Modules Wiring Table 2.5 lists the module pin descriptions. Figure 2.4 and Figure 2.5 show how to wire each module. Table 2.
Installation and Wiring 2-17 1790D-N0C2, 1790D-N0V2 Analog 2 Output Base D-Shell Modules Wiring Table 2.6 lists the module pin descriptions. Figure 2.6 shows how to wire each module. Table 2.
2-18 Installation and Wiring 1790D-TN0C2, 1790D-TN0V2 Analog 4 Input Base Modules Wiring Table 2.7 lists the module pin descriptions. Figure 2.7 shows how to wire each module. Table 2.
Chapter 3 Module Data, Status, and Channel Configuration for Analog Input Modules This chapter examines the analog input module’s data table, channel status, and channel configuration. Analog Input Image The input image file represents data words and status bits. Input words 0 through 3 hold the input data that represents the value of the analog inputs for channels 0 through 3. These data words are valid only when the channel is enabled and there are no errors. Input word 4 holds the status bits.
3-2 Module Data, Status, and Channel Configuration for Analog Input Modules Analog Input Data File The input data table allows you to access analog input module and data for use in the control program, via word and bit access. The data table structure is shown below.
Module Data, Status, and Channel Configuration for Analog Input Modules 3-3 Analog Input Data File With Discrete Input Expansion Modules The data table below shows the structure for an analog base module with one (1) of the following 8-input modules: • 1790-8BV8BX/-T8BV8BX • 1790-T8A0X discrete expansion module.
3-4 Module Data, Status, and Channel Configuration for Analog Input Modules The data table below shows the structure for an analog base module with two (2) of the following 8-input modules: • 1790-8BV8BX/-T8BV8BX modules, • 1790-T8A0X discrete expansion modules or one (1) of the following 16-input modules: • 1790-16BV0X/-T16BV0X discrete expansion modules 1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 16-Bit Discrete Expansion Module(s) Word Bit Position 15 14 13 12 11 10 9 8 7 6
Module Data, Status, and Channel Configuration for Analog Input Modules 3-5 The data table below shows the structure for an analog base module with one (1) of the following 16-input modules: • 1790-16BV0X/-T16BV0X discrete expansion module and one (1) of the following 8-input modules: • 1790-8BV8BX/-T8BV8BX discrete expansion module • 1790-8BV8VX/T8BVX discrete expansion module • 1790-T8A0X discrete expansion module 1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Input Data File with 24-Bit Discrete Expansion Mod
3-6 Module Data, Status, and Channel Configuration for Analog Input Modules The data table below shows the structure for an analog base module with two (2) 16-input 1790-16BV0X/-T16BV0X discrete expansion modules.
Module Data, Status, and Channel Configuration for Analog Input Modules Analog Input Data Format 3-7 Analog input data is presented as raw/proportional. The full 12-bit resolution is used over the entire span of the input full scale range, as shown in Table 3.1. Table 3.1 Module: Input Full Scale Range: HEX Data Range: Decimal Data Range: Input Resolution: 1790D-N4V0/-TN4V0 0-10V dc 0000-0FFF 0-4095 2.44mV 1790D-N4C0/-TN4C0 4-20mA 0000-0FFF 0-4095 3.90µA 0-20mA 0000-0FFF 0-4095 4.
3-8 Module Data, Status, and Channel Configuration for Analog Input Modules Configuring Analog Modules With RSNetWorx To configure analog modules, proceed as described in the steps below: 1. Open RSNetWorx for DeviceNet. 2. Add an analog input module (e.g. 1790D-N4C0) to the network, as shown below.. A. Use the + signs to open the following path: DeviceNet ÕVendor Õ Rockwell Automation Allen-Bradley Õ Rockwell Automation miscellaneous B. Double-click on the module. It appears on the network. 3.
Module Data, Status, and Channel Configuration for Analog Input Modules 3-9 4. Click on the Module Configuration tab. Analog input modules have a configuration screen similar to the screen shown below for the 1790D-N4C0 module. A. Click on the catalog number. B. Click on Properties. Use the Parameters tab to change module configuration. For example, the screen below shows how to change an AMP range selection. C. Use the pull-down menu to change range selection. D.
3-10 Module Data, Status, and Channel Configuration for Analog Input Modules The screen returns to "Module Configuration". A. Click on Download to save your configuration. B. Click on OK after making all configuration changes.
Chapter 4 Module Data, Status, and Channel Configuration for Analog Output Modules This chapter examines the analog output module’s output data file and configuration. Analog Output Image The output image file represents data words. Output words 0 and 1 hold the output data that represents the value of the analog outputs for channels 0 and 1. Analog output data is presented as raw/proportional. Output words 2 and 3 contain output data for two optional discrete output expansion modules.
4-2 Module Data, Status, and Channel Configuration for Analog Output Modules Analog Output Data File The structure of the output data file is shown below.
Module Data, Status, and Channel Configuration for Analog Output Modules 4-3 Analog Output Data File With Discrete Output Expansion Modules The data table below shows the structure for an analog base module with one of the following 8-output modules: • • • • 1790-8BV8BX/-T8BV8BX discrete expansion module 1790-8BV8VX/-T8BV8VX discrete expansion module 1790-TOA8X discrete expansion module 1790-T0W8X discrete expansion module.
4-4 Module Data, Status, and Channel Configuration for Analog Output Modules The data table below shows the structure for an analog base module with one (1) of the following 16-output modules: • 1790-OB16X/-TOB16X discrete expansion module • 1790-OV16X/-TOV16X discrete expansion module or two (2) of the following 8-output modules: • • • • 1790-8BV8BX/-T8BV8BX discrete expansion modules 1790-8BV8VX/-T8BV8VX discrete expansion modules 1790-TOA8X discrete expansion modules 1790-TOW8X discrete expansion mo
Module Data, Status, and Channel Configuration for Analog Output Modules 4-5 The data table below shows the structure for an analog base module with one (1) of the following 16-output modules: • 1790-OB16X/-TOB16X discrete expansion module • 1790-OV16X/-TOV16X discrete expansion module and with one (1) of the following 8-input modules • • • • 1790-8BV8BX/-T8BV8BX discrete expansion module 1790-8BV8VX/T8BV8VX discrete expansion module 1790-TOA8X discrete expansion module 1790-TOW8X discrete expansion mo
4-6 Module Data, Status, and Channel Configuration for Analog Output Modules The data table below shows the structure for an analog base module with two (2) of the following 16-output modules: • 1790-OB16X/-TOB16X discrete expansion modules • 1790-OV16X/-TOV16X discrete expansion modules 1790D-N4C0/-TN4C0, 1790D-N4V0/-TN4V0 Output Data File with 32-Bit Discrete Expansion Modules Word Bit Position 15 14 13 12 11 10 9 8 7 6 5 4 3 0 Not Used Analog Output Data Channel 0 1 Not Used Analog
Module Data, Status, and Channel Configuration for Analog Output Modules Analog Output Data Format 4-7 Analog output data is presented as raw/proportional. The full 12-bit resolution is used over the entire span of the output full scale range, as shown in Table 4.1. Table 4.1 Module: Output Full Scale Range: HEX Data Range: Decimal Data Range: Output Resolution: 1790D-NOV2/-TNOV2 0-10V dc 0000-0FFF 0-4095 2.44mV 1790D-N0C2/-TNOC2 0-20mA 0000-0FFF 0-4095 4.
4-8 Module Data, Status, and Channel Configuration for Analog Output Modules Configuring Analog Output Module Configuring CompactBlock LDX modules is as easy as POINT and click. RSNetWorx allows you to simply identify the network and configure the I/O modules with easy-to-use Electronic Data Sheets (EDS). Just POINT to the field and click on your selection. To obtain EDS files for use in configuration, go to: http://www.ab.com/networks/eds.
Module Data, Status, and Channel Configuration for Analog Output Modules 4-9 3. Double-click on the module icon on the DeviceNet network. If you are online, upload the configuration and existing module parameters are shown. A page similar to the one below appears. 4. Click on the Module Configuration tab. Analog input modules have a configuration screen similar to the screen shown below for the 1790D-N0C2 module. A. Click on the catalog number. B. Click on Properties.
4-10 Module Data, Status, and Channel Configuration for Analog Output Modules Use the Parameters tab to change module configuration. For example, the screen below shows how to change the Autobaud selection. C. Use the pull-down menu to change range selection. D. Click on OK after making all configuration changes. The screen returns to "Module Configuration". A. Click on Download to save your configuration. B. Click on OK after making all configuration changes.
Chapter 5 Module Diagnostics and Troubleshooting This chapter describes troubleshooting the analog input and output modules. This chapter contains information on: • safety considerations when troubleshooting • module vs. channel operation • the module’s diagnostic features Safety Considerations Safety considerations are an important element of proper troubleshooting procedures.
5-2 Module Diagnostics and Troubleshooting Activating Devices When Troubleshooting When troubleshooting, never reach into the machine to actuate a device. Unexpected machine motion could occur. Stand Clear of the Machine When troubleshooting any system problem, have all personnel remain clear of the machine. The problem could be intermittent, and sudden unexpected machine motion could occur.
Module Diagnostics and Troubleshooting Module Operation vs. Channel Operation 5-3 The module performs operations at two levels: • module level - power-up, configuration, and communication with a controller • channel level - data conversion and over- or under-range detection Internal diagnostics are performed at both levels of operation. When detected, module error conditions are indicated by the module status and individual channel LED lights.
5-4 Module Diagnostics and Troubleshooting Channel Diagnostics When an input or output module channel is enabled, the module performs a diagnostic check to see that the channel has been properly configured. In addition, the module checks each channel on every scan for configuration errors, under-range, open-circuit (input module in 4 to 20 mA range only). Out-of-Range Detection (Input Modules Only) An out-of-range low test is performed on all channels configured for 4-20mA inputs.
Module Diagnostics and Troubleshooting Analog Input Module Error Definition Table 5-5 Analog input module errors are expressed on a channel bases in input read word 4. The structure of the status data is shown below. Table 5.
5-6 Module Diagnostics and Troubleshooting Channel LED Indicator Operation Individual channel LED indicator operation is shown in the following tables.
Module Diagnostics and Troubleshooting 5-7 Analog Output Modules 1790D-TN0V2 Contacting Rockwell Automation 1790D-TN0C2 Status: Description: Status: Description: Flashing Green/Red Power up Flashing Green/Red Power up Off Off line Off Off line Off On line and no field power Off On line and no field power Green DeviceNet connection and no field power Green DeviceNet connection and no field power Green Field power and open wire Green Field power and open wire Green Field power an
5-8 Module Diagnostics and Troubleshooting Notes: Publication 1790-UM001A-EN-P - March 2002
Appendix A Specifications DeviceNet Analog Base Terminal Block The following table contains specifications that are common to all of the blocks in this document. Individual base block specifications are detailed after this table.
A-2 Specifications Environmental Specifications (continued) Enclosure Type Rating None (open style) Mounting DIN rail or screw Dimensions 52x104x42mm (2.03x4.07x1.64in) Weight 0.3lb (0.
Specifications A-3 4-Channel Analog Current Input Module 1790D-TN4C0 Inputs per module 4 channel single-ended, non-isolated Input Current (software configurable) 4-20mA (default) 0-20mA Resolution 12 bits-unipolar 1/4096 maximum 3.90µA/bit (4-20mA) 4.88µA/bit (0-20mA) Converted Data Binary data 0000 to 0fff (max scale) Conversion Time 10ms/channel Overall accuracy 0.
A-4 Specifications 2-Channel Analog Current Output Module 1790D-TN0C2 Outputs per module 2 channel single-ended, non-isolated Output Current 0-20mA Resolution 12 bits 1/4096 maximum 4.88µA/bit Converted Data Binary data 0000 to 0fff (max scale) Conversion Time 2ms/channel Overall accuracy 0.
Specifications A-5 4-Channel Analog Voltage Input Module 1790D-TN4V0 Inputs per module 4 channel single-ended, non-isolated Input Voltage 0-10V Resolution 12 bits-unipolar 1/4096 maximum 2.44mV/bit Converted Data Binary data 0000 to 0fff (max scale) Conversion Time 10ms/channel Overall accuracy 0.
A-6 Specifications 2-Channel Analog Voltage Output Module 1790D-TN0V2 Outputs per module 2 channel single-ended, non-isolated Output Voltage 0-10V Resolution 12 bits-unipolar 1/4096 maximum 2.44mV/bit Converted Data Binary data 0000 to 0fff (max scale) Conversion Time 2ms/channel Overall accuracy 0.2% Full scale @0°-55°C Calibration None required Allowable external 1KΩ minimum output load resistance Output Impedance 0.
Appendix B PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration This appendix tells you how to: • • • • • • Power Requirements determine the power requirements for the PROFIBUS modules avoid electrostatic damage install the module view the module memory map access the input image file configure channels Modules require external supplies for both system power and for the analog I/O channels. Table B.1 lists the maximum power. Table B.
B-2 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Module Installation CompactBlock LDX is suitable for use in a commercial or light industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean, dry environments (Pollution degree 2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC 60664-1)(3).
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-3 Environment and Enclosure ATTENTION ! This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 meters without derating. This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11.
B-4 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Remove Power ATTENTION ! General Considerations Remove power before removing or inserting this module or expansion module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by: • sending an erroneous signal to your system’s field devices, causing unintended machine motion.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Installing CompactBlock LDX I/O B-5 Follow these steps to install the block: 1. Set the Station Address on the Base Block 2. Mount the Base Block 3. Connect the PROFIBUS DP Terminal Connector 4. Connect Power to the Block Set the Station Address on the Base Block To set the station address, adjust the switches on the front of the base block.
B-6 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Panel Mounting 1. Place the block against the panel where you want to mount it. 2. Gently pull and position the expansion cover to the left. 3. Place a center punch, nail or similar device through the mounting holes in the block and make two marks on the panel (lower left and upper right corners of the module). 4. Remove the block and drill two holes in the panel to accommodate each of the mounting screws. 5.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-7 Mount the Optional Expansion Blocks Mount the expansion block by connecting it to a previously-installed CompactBlock LDX I/O base or expansion block.
B-8 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Connect the PROFIBUS DP Terminal Connector Follow these procedures when connecting the PROFIBUS DP terminal connector to the base block. WARNING ! If you connect or disconnect the PROFIBUS cable with power applied to this module or any device on the network, an electrical arc can occur. This could cause an explosion in hazardous location installations.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-9 Once you have properly wired the connector, attach it to the base block as shown in . Use the locking screws on the connector to fasten it to the base block. Figure B.2 Green - GND Black - COM Red - +24V dc PROFIBUS Connector Connect Power to the Block To apply power to the block, refer to Figure B.2.
B-10 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Connecting I/O Wiring Consider the following guidelines when wiring your system: General Guidelines • All module commons (ANLG COM) are connected in the analog module. The analog common (ANLG COM) is not connected to earth ground inside the module. • Channels are not isolated from each other. • Do not use the analog module’s NC terminals as connection points.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-11 Wiring the Modules ATTENTION ! To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the system power supply and from any other source to the analog module. After the analog module is properly installed, follow the wiring procedure below.
B-12 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration To wire your module follow these steps. 1. At each end of the cable, strip some casing to expose the individual wires. 2. Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5 mm) of insulation away to expose the end of the wire. ATTENTION Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up. ! 3.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-13 Analog Input Wiring Use the information in Table B.3 and Figure B.3 to wire the 1790P-TN4C0 terminal block modules. Table B.
B-14 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Analog Output Wiring Use the information in Table B.4 and Figure B.4 to wire the 1790P-TN0C2 terminal block modules. Table B.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration 1790P-TN4C0 Data Structure B-15 Analog Input Image The input image file represents data words and status bits. Input words 0 through 3 hold the input data that represents the value of the analog inputs for channels 0 through 3. These data words are valid only when the channel is enabled and there are no errors. Input word 4 holds the status bits. Analog input data is presented as raw/proportional.
B-16 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration 1790P-TNOC2 Data Structure Analog Output Image The output image file represents data words. Output words 0 and 1 hold the output data that represents the value of the analog outputs for channels 0 and 1. Analog output data is presented as raw/proportional. Output words 2 and 3 contain output data for two optional discrete output expansion modules. Analog output data is presented as raw/proportional.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Configuring Analog Modules with the SST PROFIBUS Configuration Tool B-17 The following configuration example shows how to configure your analog modules with the SST PROFIBUS configuration tool. Follow these steps: 1. Open your SST PROFIBUS configuration tool. If you are online, make sure the processor is in Program mode. 2. Add the PROFIBUS master to your network. A. Open the Masters and the SST folders. B.
B-18 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration 4. Add slaves to the network. A. If necessary, use the search button to see a list of stations on the network. B. Select the station. C. Right-click to see pop-up menu. D. Choose the appropriate GSD file and the module appears on the network as shown. 5. Access the module’s properties. A. Right-click on the module to see the pop-up menu. B. Select Properties.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-19 6. Use the pop-up screen shown below to change the module’s properties. A. Make sure the station number is correct. B. Click on other tabs or OK when finished on this screen. 7. If necessary, add additional modules as shown below. A. Click on the Modules tab. B. Click on Add. The following screen appears to add modules. C. Choose the module. D. Click on OK.
B-20 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration 8. Set the I/O type. This screen also shows the data size information. A. Click on the SLC Addresses tab. B. Choose the Input. This example uses the I Type input. 9. Set the Watchdog Time Base and Current Range. A. Click on the Ext. Prms tab. B. Use the pull-down menu to change the Watchdog Time Base. C. Use the pull-down menu to change the Current Range. D. Click OK when finished. 10. Save the configuration file.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Downloading Configuration B-21 To download configuration to the module, follow these steps: 1. Make sure the serial communication cable is connected between the PC com port and the scanner serial port. 2. Verify that the processor is in Program mode. 3. Use the SST PROFIBUS configuration tool to connect to the master. A. Right-click on the master to see the pull-down menu. B. Click on Connect. 4.
B-22 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Any configuration mismatches are displayed in the software, as shown in the screen below. This example shows a mismatch in the master configuration. 5. Load configuration to the master. A. Right-click on the master to see the pull-down menu. B. Click on Load Configuration. 6. If the scanner is online, the software prompts you and asks if you want to load configuration. Choose YES.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration B-23 The master status changes to the Configured Program mode. This master is in Configured Program mode. 7. Change the processor to Run mode. In addition to solid green indicator lights on the module, you should see the screen below.
B-24 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration PROFIBUS DP Specifications Table B.7 lists the module specifications. Table B.
PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Summary B-25 This appendix describes PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration with the SST PROFIBUS Configuration tool. For more information, consult your PROFIBUS network, scanner and network configuration tool documentation.
B-26 PROFIBUS Modules Installation, Wiring, Module Data, Status and Channel Configuration Notes: Publication 1790-UM001A-EN-P - March 2002
Glossary The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here refer to Allen-Bradley’s 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.
Glossary 2 input image – The input from the module to the controller. The input image contains the module data words and status bits. LSB – (Least Significant Bit) The bit that represents the smallest value within a string of bits. For analog modules, the LSB is defined as the rightmost bit, bit 0, of the 16-bit field. linearity error – An analog input or output is composed of a series of voltage or current values corresponding to digital codes.
Glossary 3 overall accuracy – The worst-case deviation of the output voltage or current from the ideal over the full output range is the overall accuracy. For inputs, the worst-case deviation of the digital representation of the input signal from the ideal over the full input range is the overall accuracy. this is expressed in percent of full scale. Gain error, offset error, and linearity error all contribute to input and output channel accuracy.
Glossary 4 Notes: Publication 1790-UM001A-EN-P - March 2002
Index A H heat considerations 2-3 A/D definition Glossary-1 abbreviations Glossary-1 analog input module definition Glossary-1 overview 1-1 C channel definition Glossary-1 channel diagnostics 5-4 channel status LED 1-4 channel update time definition Glossary-1 configuration word definition Glossary-1 contacting Rockwell Automation 5-7 current draw 1769-IF4 2-1 1769-OF2 2-1 D D/A converter definition Glossary-1 data word definition Glossary-1 definition of terms Glossary-1 I input image definition Gloss
2 Index R resolution definition Glossary-3 U update time. See channel update time. update time. See module update time.
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