CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 311

• 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 I/O Response Time in Tag Data Links
10-3-1 Timing of Data Transmissions
10-3-2 EtherNet/IP Unit or CJ2H Built-in Port Data Processing Time
I/O Response Time in Tag Data Links
Note
This section describes the data processing time for an EtherNet/IP Unit or a
built-in EtherNet/IP port on a CJ2H-CPU6@-EIP CPU Unit. The data process-
ing time for a built-in EtherNet/IP port on the CJ2M-CPU3@ CPU Unit is differ-
ent. For details, refer to 10-4 Tag Data Link Performance for CJ2M Built-in
EtherNet/IP Ports.
The following diagram shows the timing of tag data link transmissions
between the EtherNet/IP Unit or CJ2H built-in port and the CPU Unit.
The data transmission is processed during the I/O refresh period. Send data
is processed with transmission at regular intervals, and received data is pro-
cessed together with the send data when new data has been received from
other nodes. The following diagram shows the timing of data transmissions.
If there is an interrupt for data transmission processing, the CPU Unit’s cycle
time is extended by that interrupt processing time. Refer to 10-3-2 EtherNet/IP
Unit or CJ2H Built-in Port Data Processing Time for details.
The following formula approximates the time required for the EtherNet/IP Unit
or CJ2H built-in port to process data transmissions with the CPU Unit (i.e., the
data processing time).
EtherNet/IP
Unit processing
CPU Unit processing
(0.0008 × Number of data transmission words) + 1.0 ms
Approximation of the data processing time for an
EtherNet/IP Unit or CJ2H Built-in Port
Data received
EtherNet/IP Unit data
processing time
(Refer to 10-3-2.)
Basic
pro-
cesses
execution
Program
CPU Unit’s cycle time
Data exchange processing
I/O refreshing
Peripheral
servicing
Section 10-3
Basic
pro-
cesses
283