Chapter 9 Communication instructions
202 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
MODBUSLOCPARA custom command support
Custom Commands in the range of 0-255 that are not already assigned to a
Modbus command are also supported. If a custom command is used then the
LocalCfg:ElementCnt contains the number of bytes received.
The response is received into the Local Address Data and overwrites the request
data.
Example for CMD=0x2B
• Local Address Data 1:0x0E, READ_DEVICE_ID_MEI
• Local Address Data 2:0x01, READ_DEV_ID_BASIC
• Local Address Data 3:0x00, Read Vendor Object
Message execution process (Rung = TRUE)
The following process diagram describes the message instruction events that occur
when the Rung condition is True.
To Next Page
Loading...
