CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 315

• Manufacturer Part Number: CJ1W-EIP21
• Description: Ethernet I/P Module
• Manufacturer: Omron

Specifications of CJ1W-EIP21

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

I/O Response Time in Tag Data Links
(1) Node 1 (PLC #1) Input ON Response Time
This is the delay time for the external input device from when the input occurs
until the switch actually turns ON and the time until the input data is stored in
the memory area of the CPU Unit for PLC #1. In this system, the input switch
delay time is 1.5 ms. Also, one CPU cycle time is required until the data is
stored in the memory area of the CPU Unit. Therefore, the input ON response
time is 1.5 ms + 10 ms, or 11.5 ms.
(2) Node 1 (PLC #1) Send Data Processing Time
This is the time until memory data in the CPU Unit is transferred to the Ether-
Net/IP Unit. If the amount of data that can be processed in one data transmis-
sion with the CPU Unit is exceeded, data transmission will be performed over
multiple cycles of the CPU Unit, and so time is calculated for the number of
transmissions times the CPU Unit cycle times. The following table gives the
send data processing times and breakdown for node 1 (PLC #1) in this sys-
tem configuration. Refer to 10-3-2 EtherNet/IP Unit or CJ2H Built-in Port Data
Processing Time for details on the calculation formula for each item.
A CPU Unit cycle time
for PLC #1
B Number of transmis-
sions based on the data
size
C EtherNet/IP Unit data
processing time
(1) Input ON
response
time
Input
Item
Send data processing time
Calcu-
lation
(2) Send data
processing
time
PLC #2 processing
Cycle time x 2
Tag data link I/O response time
Number of data transmission words (11,552
words) ÷ 6,432 words (using a CJ2 CPU
Unit)
0.0008 × 6,432 + 1.0 (Maximum number of
transmission words per cycle)
(3) RPI
(4) Network transmission delay time
Calculation formula
Receive data processing time
(5) Receive data
processing time
PLC #1 processing
Cycle time x 4
Tag data link refresh cycle
(6) Output ON
response time
Calcu-
lation
Section 10-3
: I/O processing
: Data exchange
10 m sec
2
6.15 m sec
Time
Output
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