CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 290

• 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

Communications System
10-1 Communications System
10-1-1 Tag Data Link Communications Method
Packet Interval (RPI)
Settings
262
15 ms
■
Heartbeat Frame Transmission Period
In EtherNet/IP tag data links, the data transmission period is set for each con-
nection as the packet interval (RPI). The target device will send data (i.e., out-
put tags) once each packet interval (RPI), regardless of the number of nodes.
Also, the heartbeat frame is sent from the originator to the target for each con-
nection. The target uses the heartbeat to check to see if errors have occurred
in the connection with the originator. The data transmission period of the
heartbeat frame depends on the packet interval (RPI) settings.
Example
In this example, 2 tag data link connections are set for node 2 (the originator)
and node 1 (the target).
In this case, output data 1 is sent from node 1 to node 2 every 10 ms, and out-
put data 2 is sent from node 1 to node 2 every 15 ms, as shown in the follow-
ing diagram. Also, data is sent from node 2 (the originator) to node 1 (the
target) with a heartbeat of 100 ms for connection 1 and a heartbeat of 100 ms
for connection 2.
• Packet interval < 100 ms
• Packet interval ≥ 100 ms
The heartbeat frame transmission period is 100 ms.
The heartbeat frame transmission period is the same as the RPI.
The packet interval (RPI) for output data 1 is set to 10 ms.
The packet interval (RPI) for output data 2 is set to 15 ms.
10 ms
10 ms
Target
Node 1
Connection 1 heartbeat
Connection 2 heartbeat
Output data 1
Output data 2
Output data 1
Output data 2
Output data 1
Node 2
100-ms interval
100-ms interval
Section 10-1
Originator