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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.
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.
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.
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
CPU processing mode
settings
Processing time considerations
Normal Mode 4% of CPU Unit cycle time
Priority peripheral servicing Ethernet Unit is
given priority.
Time slice peripheral servicing execution
time
Ethernet Unit is not
given priority.
Set peripheral servicing time
(Default: 4% of CPU Unit cycle time)
Parallel processing with syn-
chronous memory access
4% of CPU Unit cycle time
Parallel processing with
asynchronous memory
access
1 ms max.
CPU processing mode
settings
Processing time considerations
Normal Mode CPU Unit cycle time
Priority peripheral servicing Ethernet Unit is
given priority.
Time slice instruction execution time
Ethernet Unit is not
given priority.
CPU Unit cycle time
Parallel processing with syn-
chronous memory access
CPU Unit cycle time
Parallel processing with
asynchronous memory
access
0.2 ms + peripheral servicing time (1 ms max. of peripheral ser-
vicing time for each Special I/O Unit, CPU Bus Unit, peripheral
port, RS-232C port, or Inner Board)
CPU processing mode
settings
Processing time considerations
Normal Mode 4% of CPU Unit cycle time
Priority peripheral servicing Ethernet Unit is
given priority.
Time slice peripheral servicing execution
time
Ethernet Unit is not
given priority.
Set peripheral servicing time
(Default: 4% of CPU Unit cycle time)
Parallel processing with syn-
chronous memory access
4% of CPU Unit cycle time
Parallel processing with
asynchronous memory
access
1 ms max.
