Rockwell Automation 440C Guardmaster 440C-CR30 Configurable Safety Relay User Manual User Manual
Page 101
Rockwell Automation Publication 440C-UM001C-EN-P - November 2014
101
Modbus Communication
Chapter 14
You should configure a second set of local variables. In this example, they are
labeled ResetCfg, ResetTrgt, and ResetAddr.
•
ResetCfg must be configured as a MODBUSLOCPARA data type.
ResetTrgt must be configured as a MODBUSTARPARA data type.
ResetAddr must be configured as a MODBUSLOCADDR data type.
•
ResetTrgt.Addr - Enter a value of 1, which is Modbus mapping of
the CR30.
•
ResetTrgt.Node - Enter a value of 1. The CR30 is fixed at Node 1.
•
ResetCfg.Channel - Select the serial port location. Enter a 2 if the
embedded serial port is used. Enter a 5 to use the serial port in the fist plug-
in slot.
•
ResetCfg.TriggerType - Enter a 1 to have the block execute every time that
the ladder is scanned
•
LocalCfg.Cmd - Enter a 5 to instruct the block to write to a 'coil' (that is,
turn on an input of the CR30).
•
ResetCfg.ElementCnt - Enter a 1 to write only 1 bit.
•
ResetAddr - The results are placed in LocalAddr. There is no need to make
changes.
Figure 120 - Reset Local Variables