Omron CJ1W-ETN21 - 04-2009 Operation Manual page 175

Communicating between OMRON PLCs
150
CPU Bus Unit Service Processing Time (Local Node)
The processing time will be as follows, depending on the CPU processing
mode settings at the CPU Unit:
CPU execution mode
Normal Mode
Priority peripheral servicing
Parallel processing with synchro-
nous memory access
Parallel processing with asynchro-
nous memory access
For details, refer to the CPU Unit operation manual.
Transmission Processing Time
Number of words sent x 0.002 + 0.550 ms
Transmission Delay
The transmission delay time will be as given below, 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.)
Baud rate
100Base-TX
10Base-T
Reception Processing Time
Number of words sent × 0.003 + 0.704 ms
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.
CPU processing
mode settings
Normal Mode CPU Unit cycle time
Priority peripheral ser- Ethernet Unit is given
vicing priority.
Ethernet Unit is not
given priority.
Parallel processing with CPU Unit cycle time
synchronous memory
access
Parallel processing with 0.2 ms + peripheral servicing time (1 ms max. of peripheral
asynchronous memory servicing time for each Special I/O Unit, CPU Bus Unit,
access peripheral port, RS-232C port, or Inner Board)
For details, refer to the CPU Unit operation manual.
Processing time considerations
Set time for peripheral servicing
(Default: 4% of CPU Unit cycle time)
1 ms max.
Delay time
Number of words sent × 0.0013 + 0.0118 ms
Number of words sent × 0.0019 + 0.0157 ms
Processing time considerations
Time slice instruction execution
time
CPU Unit cycle time
Section 6-6