Omron SYSMAC CS Series Operation Manual page 608

Error Processing
11-2-9 Cycle Time Too Long Error Check
The cycle time was too long.
A40515 (Peripheral
Servicing Cycle Too
Long) ON?
OFF
Anticipated cycle time
less than PLC Setup
monitor setting?
ON
Yes
Interrupts being
used?
Yes
No
11-2-10 PLC Setup Setting Error Check
PLC Setup setting error occurred.
Value of A406
(location of setting
error)?
Other
PLC Setup written
from Programming
Console?
570
ON
No
OFF
A440
(Maximum Interrupt
Processing Time) value
acceptable?
Yes
#00DC(220)
Yes
No
The peripheral servicing cycle time
exceeded 2 s. Reduce the event load
or set the CPU processing mode in
the PLC Setup to Normal Mode or
Peripheral Servicing Priority Mode.
The Parallel Processing Modes may
not function properly if the program
execution cycle time (A266) is too
short (less than 2 ms.)
The monitoring time was execution
time was exceed for program
execution. Increase the monitoring
time set in the PLC Setup.
The problem may be caused by long
No
processing times for interrupt tasks. Check
the contents of the task specified in A441
(Task with Highest Processing Time).
There may be more than one interrupt
task occurring, causing the cycle time
to be increased. Reduce the
frequency of interrupts.
There may be a bug in the program. Check
all tasks for the following instructions.
FOR and LOOP
JMP, CJP, and CPN
The CPU processing mode is set to
Peripheral Servicing Priority Mode, but
the priorities have not been set
correctly.
The setting indicated by the contents
of A406 is illegal. Check the setting
from a Programming Console.
A communications error may have occurred
during data transfer from the CX-
Programmer. Retransfer the PLC Setup.
Section 11-2
Not related to
problem.