Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 1224

Other Instructions
Flags
Precautions
1184
• Peripheral Port servicing
• RS-232C Port servicing
• Event servicing with Inner Boards (CS-series only)
• Event servicing (including background instruction processing) that uses a
communications port number, i.e., an internal logical port.
Execution condition
When peripheral servicing has been disabled with IOSP(287), it will remain
disabled until IORS(288) is executed, END(001) is executed, or PLC opera-
tion is stopped.
Name Label
Error Flag ER
IOSP(287) cannot be executed in an interrupt task. An error will occur and the
Error Flag will be turned ON if IOSP(287) is executed in an interrupt task.
IOSP(287) cannot disable peripheral servicing in more than one task. If it is
necessary to disable peripheral servicing in more than one task, program
IOSP(287) separately in each task.
IOSP
IORS
Operation
ON if IOSP(287) is executed in an interrupt task.
OFF in all other cases.
Section 3-31
Disables execution of
peripheral servicing.
Execution of peripheral
servicing is disabled
between IOSP(287) and
IORS(288).
Enables execution of
peripheral servicing.