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Omron CS1W-ETN21 User Manual

Page 175

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Communicating between OMRON PLCs

Section 6-6

RECV(098)

The transmission delay for the RECV(098) instruction can be calculated using
the equation illustrated in the following diagram.

CPU Bus Unit Service Cycle (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.

Maximum transmis-
sion delay time

CPU Bus Unit Service Cycle (local node 1)
+ CPU Bus Unit service processing time (local node
1)
+ Transmission processing time (command)
+ Transmission delay (command)
+ Reception processing time (command)
+ CPU Bus Unit Service Cycle (remote node)
+ CPU Bus Unit service processing time (remote
node)
+ Transmission processing time (response)
+ Transmission Delays (response)
+ Reception processing time (response)
+ CPU Bus Unit Service Cycle (local node 2)
+ CPU Bus Unit service processing time (local node
2)

CPU Bus Unit
service processing time (local node)

CPU Bus Unit
Service Cycle

(local node)

Transmission
processing time (command)

Reception processing
time (command)

CPU Bus Unit
Service Cycle

(remote node)

CPU Bus Unit
service processing time (remote node)

Reception
processing time (response)

Transmission
processing time (response)

Maximum transmission delay

Transmission Delays

(command)

Transmission Delays

(response)

CPU Bus Unit
Service Cycle

(local node 2)

RECV(098) executed in user program

CPU Bus Unit
service processing time
(local node 2)

CPU data set
processing time

CPU processing mode

settings

Processing time considerations

Normal Mode

CPU Unit cycle time

Priority peripheral servicing

Parallel processing with syn-
chronous 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)

Parallel processing with
asynchronous memory
access