What this appendix contains, Echo, Appendix a – Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module User Manual
Page 157: Appendix
Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
157
Appendix
A
PCCC Commands Supported by the Data
Highway Plus Module
What This Appendix Contains
This appendix describes PCCC commands that your 1756-DHRIO and
1756-DHRIOXT modules can execute. The module executes these commands
when received on one of its DH+ ports under only the following conditions:
•
The final destination address must be an address for the 1756-DHRIO.
•
For DH+ messages with LSAP = 0 (local), the diagnostic commands are
executed directly by the 1756-DHRIO or 1756-DHRIOXT module if
the destination address is the 1module's DH+ node address.
•
For DH+ messages with LSAP = 1 (remote), the diagnostic commands are
executed directly by the 1756-DHRIO or 1756-DHRIOXT module if
the DH+ message's network destination address is the network address of
one of the DH+ ports on the 1756-DHRIO or 1756-DHRIOXT
module, or if the DH+ message's network destination link ID is 0 and the
network destination node is the module's DH+ port node address.
•
For the first case of the remote message the Routing Table and DH+ ports
must be configured
Echo
Any data sent in the echo command is returned in the echo reply.
CMD = 06h, FNC = 00