Omron CJ1W-EIP21 用户手册

This section explains the maximum transmission delay that can occur
between the execution of a SEND(090), RECV(098), or CMND(490) instruc-
tion in the ladder program until completion of the instruction. This delay does
not include the time required for the tag data link or the execution time of the
ladder program itself.

Use the following equation to calculate the maximum transmission delay that
can occur between the execution of a SEND(090) or RECV(098) instruction in
the ladder program until completion of the instruction.

Maximum transmission delay =

CPU Bus Unit service cycle (local node)
+ CPU Bus Unit service processing time (local node)
+ Send processing
+ Transmission delay
+ Receive processing
+ CPU Bus Unit service cycle (remote node)
+ CPU Bus Unit service processing time (remote node)

The following table shows the service cycle, which depends on the CPU Unit’s
CPU processing mode setting.

CJ2 CPU Units support only Normal Mode.

Execution of SEND(090)
in user program

CPU Bus Unit service cycle 
(Local node)

CPU Bus Unit service processing time 
(Local node)

Send processing

Transmission delay

Receive processing

CPU Bus Unit service cycle 
(Remote node)

CPU Bus Unit service 
processing time (Remote node)

CPU data set 
processing

Maximum transmission delay

Normal Mode (See note.)

One CPU Unit cycle time

Priority peripheral servicing

Parallel processing with syn-
chronous memory access

Parallel processing with asyn-
chronous memory access

0.2 ms + peripheral servicing time (1 ms max. for 
peripheral servicing of each Special I/O Unit, CPU 
Bus Unit, peripheral port, RS-232C port, and Inner 
Board)