CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 313

• 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

10-3-4 Tag Data Link I/O Response Time Calculation Example
I/O Response Time in Tag Data Links
CJ2H
CJ2M
CJ1
CJ1M
CJ1-H
CS1
CS1-H
Long-distance
Rack
CPU Unit
CPU Rack: 0.1 ms
Expansion Rack: 0.13 ms
CPU Rack: 0.14 ms
Expansion Rack: 0.16 ms
0.25 ms
0.17 ms
0.1 ms
0.2 ms
0.1 ms
0.2 ms × Coefficient 2
Effect of EtherNet/IP Unit or
CJ2H built-in port only
Note
When using the tag data link functions of the EtherNet/IP Unit or CJ2H built-in
port, there is a time lag between the point when the data link area’s data
changes due to an input at a node and the point when the change is output at
another node’s data link area. This time lag is called the tag data link
I/O response time.
This example shows how to calculate the minimum and maximum I/O
response times in the following configuration for connection 1 opened
between node 1 and node 2.
Coefficient
(1) When one of the listed CPU Bus Units is mounted in a CS-series Long-
(2) The additional time for CJ2H CPU Units with unit version 1.1 or later will
distance Rack, the I/O refreshing time is extended by the distance to the
Rack in which the Unit is mounted, regardless of the model of the CPU
Unit. The following graph shows the coefficients (2 and 3) required to cal-
culate this effect.
be as follows if high-speed interrupts are enabled.
0.1 ms + Number of words transferred
CPU Rack: Value from left column + 0.1 ms + No. of words trans-
ferred × 0.33 µs (See note 2.)
Expansion Rack: Value from left column + 0.1 ms + No. of words
transferred × 0.45 µs
CPU Rack: Value from left column + 0.02 ms + No. of words trans-
ferred × 0.78 µs
Expansion Rack: Value from left column + 0.02 ms + No. of words
transferred × 0.92 µs
0.25 ms + 1.5 ms + (Number of words × 1 µs)
0.17 ms + 0.1 ms + (Number of words × 0.7 µs)
0.1 ms + 0.1 ms + (Number of words × 0.7 µs)
0.2 ms + 1.5 ms + (Number of words × 1 µs)
0.1 ms + 0.1 ms + (Number of words × 0.7 µs)
(0.2 ms × Coefficient 2) + 1.5 ms + (Number of words × 1 µs ×
Coefficient 3)
Total effect when tag data links are being used
Distance to Long-distance Rack (m)
× 0.87 µs
Section 10-3
285