Mitsubishi Electric MELSEC Q Series Reference Manual page 480

(b) Checking the execution status of the UINI instruction
The execution status of the UINI instruction (Normal completion, Error completion) can be checked with the
following devices specified in the setting data.
• Completion device (D1)
Turns ON in the END processing for the scan after completion of the UINI instruction, and goes OFF in the
next END processing.
• Completion status indication device ((D1)+1)
Turns ON in the END processing for the scan after completion of the UINI instruction, and turns OFF in the
next END processing, only when the UINI instruction has failed.
(c) Operation in UINI instruction execution
• Operation of the own station
Program of
own station
UINI instruction
Start contact
Completion device
of own station (D1)
Completion status
indication device
((D1)+1)
(4) Error
When a dedicated instruction failed, the error details can be confirmed by either of the following methods.
(a) With the programming tool
The error details can be checked in the CC IE Control diagnostics. (
(b) Checking devices
Completion status indication device ((D1)+1) is turned ON, and an error code is stored in Completion status
((S1+1) of control data.
Check the error and take corrective actions according to the error code. (
478
END END
processing processing
UINI instruction execution
ON
OFF
OFF
OFF
END END
processing processing
UINI instruction
execution completed
ON
ON When failed
Normal completion
1 scan
Page 526, Section 10.3)
Page 511, Section 10.2)