Cycle Time Exceeded Error (Fatal Error) - Omron CJ2 CPU UNIT User Manual

6 Troubleshooting

Cycle Time Exceeded Error (Fatal Error)

Cycle Time Exceeded Error
A cycle time exceeded error will occur if the PLC cycle time exceeds the setting for Watch Cycle
Time in the PLC Setup.
POWER
Lit. Not lit.
Error Causes and Remedies
Suspected cause of
error
An interrupt task with a
long processing time was
executed.
An incorrect value (an
extremely large number)
was set for the number of
repeats of FOR(512).
* The maximum processing time for an interrupt task will not be stored in A440 if High-speed interrupt function is
enabled in the PLC Setup.
6-12
RUN ERR/ALM
Lit. A401.08
Confirmation method
Check the Max. Interrupt
Task Processing Time
*
(A440)
Set up a trap in the ladder
program to monitor the
number of repeats.
Error flag Error code
809F
Remedy
Divide the interrupt task
into sections.
Correct the ladder pro-
gram.
CJ2 CPU Unit Hardware User's Manual
Error infor-
mation
None
Prevention of recur-
rence
Same as at the left.
Same as at the left.