Specification
Mounting Method: Chassis
Platform: ControlLogix
Protocol: Modbus Master/Slave
Modbus Slave Specifications
Node address: 1 to 247 (software selectable)
Status Data: Slave port error codes, counters and statuses are available separately for each port when configured as a Slave
Multi-source Slave data: Data presented at the Slave port can be derived from other Modbus Slave devices on a different network through the module's Master port or from the processor tag database.
Full Memory Access: A port configured as a Modbus Slave permits a remote Master to read from or write to any of the 5000 registers that make up the user memory database.
Modbus Master Specifications
Command List: Up to 325 commands per Master port, each fully configurable for function code, slave address, register to/from addressing and word/bit count.
Command Status/Error Monitoring: Command Status or Error codes are generated for each command as it executes, allowing careful monitoring o fcommunication health between the Master and its Slaves.
Optimized Polling: Configuration options allow Master ports and commands to be optimized to poll slaves with communication problems less frequently.
Slave Polling Control: Master Port maintains a Slave Status list of all network Slaves. Polling of each Slave may be disabled and enabled using this list.
The MVI56E Communication Module allows for Modbus Master and/or Slave connectivity from Rockwell Automation® ControlLogix® processors to Modbus RTU/ASCII devices. Each MVI56E port can be configured as a Master or Slave. The MVI56E-MCM and MVI56E-MCMXT act as input/output modules on the ControlLogix backplane, making Modbus data appear as I/O data to the processor. Two independently configurable serial ports can operate on the same or different Modbus networks. The MVI56E-MCM is designed for standard process applications and the MVI56E-MCMXT is designed for the Logix-XT™ control platform, allowing it to operate in extreme environments. It can tolerate higher operating temperatures, and has conformal coating to protect it from harsh or caustic conditions.
