Omron CS1W-ETN21 operation manual 152

Communicating between OMRON PLCs Section 6-6

CPU Bus Unit service processing time (remote node)

The processing time will be as follows, depending on the CPU processing mode settings at the CPU Unit.

CPU processing mode	Processing time considerations
settings
Normal Mode	4% of CPU Unit cycle time
Priority peripheral servicing	Ethernet Unit is	Time slice peripheral servicing execution
	given priority.	time
	Ethernet Unit is not	Set peripheral servicing time
	given priority.	(Default: 4% of CPU Unit cycle time)
Parallel processing with syn-	4% of CPU Unit cycle time
chronous memory access
Parallel processing with	1 ms max.
asynchronous memory
access

For details, refer to the CPU Unit operation manual.

CPU Bus Unit Service Cycle (Local Node 2)

The processing time will be as follows, depending on the CPU processing mode settings at the CPU Unit.

CPU processing mode	Processing time considerations
settings
Normal Mode	CPU Unit cycle time
Priority peripheral servicing	Ethernet Unit is	Time slice instruction execution time
	given priority.
	Ethernet Unit is not	CPU Unit cycle time
	given priority.
Parallel processing with syn-	CPU Unit cycle time
chronous memory access
Parallel processing with	0.2 ms + peripheral servicing time (1 ms max. of peripheral ser-
asynchronous memory	vicing time for each Special I/O Unit, CPU Bus Unit, peripheral
access	port, RS-232C port, or Inner Board)

For details, refer to the CPU Unit operation manual.

CPU Bus Unit Service Processing Time (Local Node 2)

The processing time will be as follows, depending on the CPU processing mode settings at the CPU Unit.

CPU processing mode	Processing time considerations
settings
Normal Mode	4% of CPU Unit cycle time
Priority peripheral servicing	Ethernet Unit is	Time slice peripheral servicing execution
	given priority.	time
	Ethernet Unit is not	Set peripheral servicing time
	given priority.	(Default: 4% of CPU Unit cycle time)
Parallel processing with syn-	4% of CPU Unit cycle time
chronous memory access
Parallel processing with	1 ms max.
asynchronous memory
access

For details, refer to the CPU Unit operation manual.

Note The actual operating environment can cause transmission delays larger than those calculated with the methods given here. Among the causes of longer delays are the following: traffic on the network, window sizes at network

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