Mitsubishi Electric MELSEC-Q Series User Manual page 228

(c) Check of the completion status
There are two types of interlock signals for the G(P).RDMSG instruction: Completion device (D2) and Status
display device at completion (D2) + 1.
• Completion device
Turns on in the END process of the scan where the G(P).RDMSG instruction is completed, and turns off in
the next END process.
• Status display device at completion
Turns on and off depending on the completion status of the G(P).RDMSG instruction.
Normal completion:
Abnormal end:
Sequence program
G(P).RDMSG instruction
Completion device
Status display device
at completion
(d) Basic number of steps
The basic number of steps of the G(P).RDMSG instruction is ten.
(4) Operation error
For the following cases, an operation error occurs; Error flag (SM0) turns on and the error code is stored in SD0.
Error code
2112
4002
4003
4004
4100
4101
226
Remains off and does not change.
Turns on in the END process of the scan where the G(P).RDMSG instruction is
completed, and turns off in the next END process.
End End
process process
ON
OFF
OFF
OFF
When the module specified by Un is not an intelligent function module
When attempting to execute an unsupported instruction
When the number of devices for the instruction is incorrect
When the device that cannot be used for the instruction is specified
When the data that cannot be used for the instruction is contained
When the number of data used for the instruction is set beyond the allowable range.
Or when the storage data or constants of the device specified with the instruction exceeds the
allowable range
Execution completion of
the G(P).RDMSG instruction
Condition that an operation error occurs
End End
process process
ON
Abnormal end
Normal completion
1 scan