Related Manuals for Emerson PACSystems VersaMax IC200CMM020
Summary of Contents for Emerson PACSystems VersaMax IC200CMM020
- Page 1 IMPORTANT PRODUCT INFORMATION GFK-2423G Nov 2019 PACSystems VersaMax SERIAL COMMUNICATION MODULE (IC200CMM020)
- Page 2 It is understood that Emerson may make changes, modifications, or improvements to the equipment referenced herein or to the document itself at any time. This document is intended for trained personnel familiar with the Emerson products referenced herein.
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Page 3: Product Description
GFK-2423G Nov 2019 Product Description The VersaMax Serial Communications Module, IC200CMM020, operates as a Modbus RTU Master in a VersaMax I/O Station controlled by a Genius Network Interface Unit or a PROFINET Scanner. Serial Communications Modules may be installed at any location in the I/O Station. Up to two Serial Communications modules can be used per I/O Station. -
Page 4: Specifications
GFK-2423G Nov 2019 5V Power The module supplies 5V power to external devices via the serial port. The amount of power available to external devices is approximately 100mA, and varies depending on how the serial device(s) are wired. The module itself requires 10mA, and a half-duplex line terminated with 120 Ohms at each end requires an additional 83mA. - Page 5 GFK-2423G Nov 2019 2. Install the Module on the Communications Carrier. The latch on the module must be in the unlocked position Align the connectors and the latch post and press the module down until the two tabs on the bottom of the module click into place.
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Page 6: Installation In Hazardous Locations
COMMREQs” because their format is similar to the existing Modbus RTU COMMREQ (Communication Request) commands. These commands are defined in the document Modbus RTU Communications, GFK-2220C or later, which is available at https://www.emerson.com/Industrial-Automation-Controls/support. Commands from the remote host to the module are sent via %AQ memory. The module returns the command response in the first two %AI registers that have been configured for the module. - Page 7 GFK-2423G Nov 2019 %AI Word Location Description Word 2 Sequence Number of Command Word 3-n Data (if any) Because the status information is mapped into memory, the COMMREQ status address segment selector (Word 3) and offset (Word 4) in the COMMREQ command block are ignored. The module forms the requested RTU Master command and exchanges data with an RTU Slave device.
- Page 8 GFK-2423G Nov 2019 Example In this example, an application program in a host PLC initializes the Master Serial Port Command Program Block, then sets up the Send RTU Preset Query Command (08002). In the host PLC, the Genius Bus Controller is configured at %AQ0001. In the I/O Station, the VersaMax Serial Communications module is configured in the Genius NIU to have 48 %AQ references starting at %AQ0001 and 32 %AI references starting at %AI0001.
- Page 9 GFK-2423G Nov 2019 To trigger the command, the sequence number, %AQ0002 must be incremented. When the sequence number in %AI0002 matches the value sent in %AQ0002, it checks the command status value. If the command status value in %AI0001 is 1, the command has been successfully executed. The Serial Comm Module is configured as an RTU Master and ready to accept Modbus RTU commands.
- Page 10 GFK-2423G Nov 2019 As before, to trigger the command, the sequence number, %AQ0002 must be incremented. When the sequence number in %AI0002 matches the value sent in %AQ0002, it checks the command status value. If the command status value in %AI0001 is 1, the command has been successfully executed. The Serial Communications Module has successfully transmitted the Modbus RTU command to RTU Slave Device 3.
- Page 11 GFK-2423G Nov 2019 Initialize RTU Master Port: 65520 (FFF0) Value Description Word Location Word 1 16 for Modbus RTU Master Port Setup Command/Data Block Length in words (includes Words 7 – 22, inclusive) Word 2 0-65535 Command Sequence number that will be incremented any time a new command is being sent.
- Page 12 GFK-2423G Nov 2019 RTU Master Command 8001 - Read RTU Master Diagnostic Status Words As described in the Modbus RTU Communications Manual, with the exception that the Status Word Memory Type and location are ignored. The status is returned to the first word of %AI memory. RTU Master Command 8002 -Send RTU Read/Force/Preset Query The Send RTU Read/Force/Preset Query command is sent to the Serial Communications module by placing the values shown below into the module’s configured %AQ memory references.
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Page 13: Product Revision History
Product Revision History Revision Date Description Following Emerson’s acquisition of this product, changes have been made to apply appropriate IC200CMM020-GA Nov 2019 branding and registration of the product with required certification agencies. No changes to material, process, form, fit or functionality. - Page 14 GFK-2423G Nov 2019 • When executing a Communications Restart Query, a timeout status will be returned if the Query is sent to a single RTU Slave address and the Slave is currently in Force Listen Only Mode. No timeout will occur if the RTU Broadcast Address is used.
- Page 15 Note: If the product is purchased through an Authorized Channel Partner, please contact the seller directly for any support. Emerson reserves the right to modify or improve the designs or specifications of the products mentioned in this manual at any time without notice.