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Communicating between OMRON PLCs Section 6-6
CPU Bus Unit Service Processing Time (Local Node 1)
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.
Transmission processing time (command)
Transmission Delay (Command)
The transmission delay time will be as follows, depending on the baud rate set
for the Ethernet Unit. (There may be additional delays depending on devices
such as hubs in the network configuration.)
Reception processing time (command)
CPU Bus Unit Service Cycle (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 processing mode
settings
Processing time considerations
Normal Mode Set peripheral servicing time
(Default: 4% of CPU Unit cycle time)
Priority peripheral servicing
Parallel processing with syn-
chronous memory access
1 ms max.
Parallel processing with
asynchronous memory
access
Command 0.550 ms
Response Number of words sent × 0.002 + 0.550 ms
Baud rate Delay time
100Base-TX Command 0.0118 ms
Response Number of words sent × 0.0013 + 0.0118 ms
10Base-T Command 0.0157 ms
Response Number of words sent × 0.0019 + 0.0157 ms
Command 0.704ms
Response Number of words sent × 0.003 + 0.704 ms
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)
