6 Troubleshooting
6-12
CJ2 CPU Unit Hardware User’s Manual
z Cycle Time Too Long
A cycle time too long error will occur if the PLC cycle time exceeds the setting for Watch Cycle Time
in the PLC Setup.
z Error Causes and Remedies
z Peripheral Servicing Too Long
This error will occur if the peripheral servicing time exceeds 2.0 s.
z Error Causes and Remedies
Cycle Time Too Long (Fatal Error)
POWER RUN ERR/ALM
CX-Program-
mer display
Error flag Error code
Error infor-
mation
Lit. Not lit. Lit. Cycle Time
Error
A401.08 809F None
Suspected cause of
error
Confirmation method Remedy
Prevention of recur-
rence
An interrupt task with a
long processing time was
executed.
Check the Max. Interrupt
Task Processing Time
(A440)
Divide the interrupt task
into sections.
Same as at the left.
An incorrect value (an
extremely large number)
was set for the number of
repeats of FOR(512).
Set up a trap in the ladder
program to monitor the
number of repeats.
Correct the ladder pro-
gram.
Same as at the left.
POWER RUN ERR/ALM
CX-Program-
mer display
Error flag Error code
Error infor-
mation
Lit. Not lit. Lit. Cycle Time
Error
A405.15 809F ---
Suspected cause of
error
Confirmation method Remedy
Prevention of recur-
rence
The event load was too
high.
--- Reduce the event load. Same as at the left.
To Next Page
Loading...
