Omron CS1W-ETN21 - Manual (Page 172)

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Communicating between OMRON PLCs Section 6-6
6-6-6 Transmission Delays
The methods of computing the maximum time required from execution of the
SEND(090), RECV(098), and CMND(490) instructions until processing is
completed are described in this section.
SEND(090)
The transmission delay for the SEND(090) instruction can be calculated using
the following equation, which is illustrated in the following diagram.
CPU Bus Unit Service Cycle (Local 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.
Max. delay = CPU Bus Unit service cycle (local node)
+CPU Bus Unit service processing time (local node)
+Transmission processing time
+Transmission Delays
+Reception processing time
+CPU Bus Unit service cycle (remote node)
+CPU Bus Unit service processing time (remote node)
Maximum transmission delay
CPU Bus Unit
service cycle (local node)
CPU Bus Unit service
processing time (local node)
CPU Bus Unit
service cycle (remote node)
CPU Bus Unit service
processing time (remote node)
Transmission processing time
Reception processing time
Transmission Delays
CPU data set
processing time (remote node)
SEND(090) executed
in user program
CPU execution mode Processing time considerations
Normal Mode CPU Unit cycle time
Priority peripheral ser-
vicing
Parallel processing with
synchronous memory
access
Parallel processing with
asynchronous memory
access 0.2 ms + peripheral servicing time (1 ms max. of peripheral
servicing time for each Special I/O Unit, CPU Bus Unit,
peripheral port, RS-232C port, and Inner Board)