11.20
SVCREQ 26/30: Interrogate I/O
Use SVCREQs 26 and 30 to check whether the installed modules match the software
configuration. If not, these SVCREQs place appropriate addition, loss, and mismatch
faults in the PLC and/or I/O fault tables. SVCREQs 26 and 30 both perform the same
function.
The more configuration faults there are, the longer it takes these SVCREQs longer to
execute.
These SVCREQs have no parameter block. They always output power flow.
11.20.1
Example of SVCREQ 26
In the example, when input %I0251 is ON, the SVCREQ checks the installed modules
and compares them to the software configuration. Output %Q0001 is turned on after the
SVCREQ is complete.
CONST
00026
SVC_
REQ
FNC
PARM
%R0050
%I0251
%Q0001
222
GFK-1503E
VersaMax PLC User Manual
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