Mitsubishi MELSEC-A Series Operating Manual page 140

6. HOW TO USE EACH FUNCTION
MELSEGA
[Explanatlon]
(1)
The A8PUE starts a program check and checks "dual coil", "instruction
code error", and "END instruction missing" of all instructions in the range
from a designated step to the END instruction of a sequenee program
written to an ACPU. (Therefore, checking will take some time.)
(2) When a program check is completed normally, the step number of the
END instruction and "END" are displayed.
(3) When an error or fault is detected by a program check, the step number
where the error or fault occurred and the message that corresponds to
the fault contents are displayed, and the program check is interrupted.
1)
Press the [GO] key to execute continuous program checking. A
program check is started from the step next to a stopped step.
2) When modifying error or fault contents detected by program check,
press the [READ] key, or [SHIFT]
+
[WRITE] keys when an error or
fault is detected (when a program check is interrupted).
The program of the step number where an error or fault occurred is
displayed by pressing the [READ] key, or [SHIFT]
+
[WRITE] keys.
Therefore, correction can be done easily. When an error or fault
occurs, modify the sequence program as follows:
Designated dual coil
..............
Modify the program if necessary.
Instruction code error
............
Overwrite the same instruction.
END instruction missing
........
Add it.
(Rewrite)
3) Use the following methods to continue the program check after
modifying the program:
Method of continuing a program check from the stopped step
............
Select "2:PROGRAM CHECK" from the OTHERS mode,
and press the [GO] key. (The interrupted number of steps
is displayed.)
Method of continuing from the designated step
............
Select "2:PROGRAM CHECK" from the OTHERS mode,
input the designated step number, and press the [GO]
key.
(4)
Pressing the [END] or [CLEAR] key returns to the "2: PLC CHECK" menu.
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