Omron CJ1W-EIP21 User Manual

In this example, RECV(098) is used to receive 256 words of data from another
PLC. The maximum transmission delay is calculated based on the following
operating conditions.

• Local node’s CPU cycle time: 10 ms

• Local node’s CPU execution mode: Normal

• Local node’s CPU peripheral servicing time: Default (4%)

• Remote node’s CPU cycle time: 15 ms

• Remote node’s CPU execution mode: Normal

• Remote node’s CPU peripheral servicing time: Default (4%)

• Baud rate: 100Base-TX

CPU Bus Unit service cycle (local 
node, 1)

10 ms

CPU Bus Unit service processing 
time (local node, 1)

0.4 ms

Send processing (command)

0.550 ms 

≅

 0.5 ms

Transmission delay (command)

0.0118 ms 

≅

 0.1 ms

Receive processing (command)

0.704 ms 

≅

 0.7 ms

CPU Bus Unit service cycle (remote 
node)

15 ms

CPU Bus Unit service processing 
time (remote node)

0.6 ms

Send processing (command)

(256 

×

 0.002) + 0.550 = 1.062 

≅

 1.1 ms

Transmission delay (command)

(256 

×

 0.0013) + 0.0118 = 0.3446 

≅

 0.3 ms

Receive processing (command)

(256 

×

 0.003) + 0.704 = 1.472 

≅

 1.5 ms

CPU Bus Unit service cycle (local 
node, 2)

10 ms

CPU Bus Unit service processing 
time (local node, 2)

0.4 ms

Maximum transmission delay

10 + 0.4 + 0.5 + 0.1 + 0.7 + 15 + 0.6 + 1.1 + 
0.3 + 1.5 + 10 + 0.4 = 40.6 ms