CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 248

• 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

Communicating between OMRON PLCs
8-6
8-6-1
220
Communicating between OMRON PLCs
Communications Specifications
Note
FINS commands can be sent from the CPU Unit of a PLC by using the
SEND(090), RECV(098), and CMND(490) instructions.
SEND(090): Writes I/O data from the local node to another node.
RECV(098): Reads I/O data from another node to the local node.
CMND(490): Issues FINS commands for controlling operations such as send-
ing and receiving I/O memory data to and from other nodes, reading informa-
tion regarding other nodes, and so on.
The following table shows the specifications for PLC communications using
the SEND(090), RECV(098), and CMND(490) instructions.
1. The maximum data length is limited to 512 bytes for data exchange be-
2. When broadcasting, do not require a response.
Destination
Data length
Data contents
Communications
port number
Response moni-
tor time
Number of retries
tween the PLC and SYSMAC LINK Systems or the PLC and SYSMAC
BUS/2 Remote I/O Systems.
Use the FINS/UDP method for broadcasting.
Item
1:1
1:N
SEND(090):
990 words (1,980 bytes) max.; broadcasting:
727 words (1,454 bytes)
RECV(098):
990 words (1,980 bytes) max.
CMND(490):
1,990 bytes max.; broadcasting: 1,462 bytes (after FINS com-
mand code)
The following data is sent and received with the execution of
each instruction.
SEND(090):
Sends request for remote node to receive data, and receives
response data.
RECV(098):
Sends request for remote node to send data, and receives
response data.
CMND(490):
Sends any FINS command and receives response data.
Ports 0 to 7 (Eight transmissions can occur simultaneously.)
0000:
2 s (default)
0001 to FFFF:
0.1 to 6,553.5 s in 0.1-s increments (specified by user)
0 to 15 retries
SEND(090), RECV(098), CMND(490) instructions
SEND(090), CMND(490) instructions (broadcasting)
Specifications
Section 8-6