Commreq Format For Programming Channel Commands - GE RX3i User Manual

COMMREQ Format for Programming Channel Commands

7.2
The Channel commands described in this chapter are sent using the Communications Request (COMMREQ)
function.
The Communications Request is triggered when the logic program passes power to the COMMREQ Function
Block.
For the Channel Commands, the parameters of the COMMREQ are:
Enable: Control logic for activating the COMMREQ Function Block.
IN: The location of the Command Block. It can be any valid address within a word-oriented area of (%R, %AI,
%AQ, %P, %L, or %W).
SYSID: A hexadecimal word value that gives the rack (high byte) and slot (low byte) location of the Ethernet
Interface. For the PACSystems CPU embedded Ethernet interface, enter the rack/slot location of the CPU
module.
TASK: For the PACSystems Ethernet module, Task must be set to zero.
For the PACSystems CPU embedded Ethernet interface, Task must be set to the value 65536 (10000H) to
address the CPU's Ethernet daughterboard.
FT Output: The FT output is set if the PLC CPU (rather than the Ethernet Interface) detects that the COMMREQ
fails. In this case, the other status indicators are not updated for this COMMREQ.
GFK-2224Q
(Enable ) -------------
(Command Block address) -
(Rack/Slot Location of
-
the Ethernet Interface)
(Task value) -
Figure 49: COMMREQ for Programming Channel Commands
Rack Slot
0 0
0 4
3 4
2 9
4 2
Entering an incorrect TASK value may cause the Ethernet Interface to fail.
Chapter 7. Programming SRTP Channel Commands
COMM
- CommReq Delivered
REQ
IN FT - Function Faulted (logic)
SYSID
TASK
Hex Word Value
0000H (RXi and CPE400)
0004H
0304H
0209H
0402H
Caution
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