Mitsubishi Q2ACPU User Manual page 385

22. TROUBLE SHOOTING
Error
Error Contents and Cause
Code
[STEP EXE. ERROR]
Startup was executed at a block in the SFC
program that was already started up.
■Collateral informationmmon
4630
• Common Information:Program error location
• Individual Information:–
■Diagnostic Timing
• When instruction executed
[STEP EXE. ERROR]
• Startup was attempted at the step that does not
exist in the SFC program.
Or, the step that does not exist in the SFC
program was specified for end.
• Forced transition was executed based on the
transition condition that does not exit in the SFC
program.
4631
Or, the transition condition for forced transition
that does not exit in the SFC program was
canceled.
■Collateral informationmmon
• Common Information:Program error location
• Individual Information:–
■Diagnostic Timing
• When instruction executed
[STEP EXE. ERROR]
There were too many simultaneous active steps in
blocks that can be designated by the SFC program.
■Collateral informationmmon
4632
• Common Information:Program error location
• Individual Information:–
■Diagnostic Timing
• When instruction executed
[STEP EXE. ERROR]
There were too many simultaneous active steps in
all blocks that can be designated.
■Collateral informationmmon
4633
• Common Information:Program error location
• Individual Information:–
■Diagnostic Timing
• When instruction executed
Corrective Action
Read common information of the error using the
peripheral device, check error step corresponding
to its numerical value (program error location), and
correct the problem.
• Read the common information of the error using
the peripheral device, and check and correct the
error step corresponding to that value (program
error location).
• Turn ON if the special relay SM321 is OFF.
Read common information of the error using the
peripheral device, check error step corresponding
to its numerical value (program error location), and
correct the problem.
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LED Status Corresponding
CPU Status CPU
RUN:
Off
ERR.:
Flicker QnA
CPU Status:
Stop