Omron SYSMAC CS Series Operation Manual page 96

Difference between I/O Refreshing in Customizable
Reference: The Customizable Counter Unit refreshes I/O by performing a handshake
with the CPU Unit at any time (with -V1 lot No. 0302 or later Units only)
76
The Customizable Counter Unit can refresh the I/O by performing a hand-
shake with the CPU Unit at any time. Execute the IORF instruction (with oper-
ands set to 002 and 002) in the Customizable Counter Unit to refresh the I/O
data in its shared memory. At the same time, start an interrupt task in the CPU
Unit so the IORF instruction can be executed on the shared memory in the
Customizable Counter Unit from within the interrupt task.
Example:
In a ladder program in the Customizable Counter Unit
Refresh launched
= flag
In interrupt task No. 10 in the CPU Unit
This way, the Customizable Counter Unit can refresh its data in the CPU Unit
immediately at any specified time.
[IORF 002 002] Executes I/O refresh on its own shared memory.
[MCRO 110 000 000] Starts CPU interrupt task 10.
= flag
(A) Interrupt task started successfully
Executes I/O refresh on shared memory in
[IORF 20 00 2009]
Unit No. 0 (Customizable Counter Unit).
Section 4-5