Omron CP - PROGRAMMING MANUAL 05-2007 - 3-24 Network Instructions; Network Instructions

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Network Instructions Section 3-24
3-24 Network Instructions
This section describes instructions used to send and receive data via net-
works.
3-24-1 About Network Instructions
The network instructions are used between nodes on networks configured
using Serial Communications Option Boards and CJ-series Units to transfer
data and control operation, such as changing the operating mode. Nodes can
consist of CP-series CPU Units, CS/CJ-series CPU Units, CS/CJ-series CPU
Bus Units, and computers.
The commands executed by the network instructions are known as “FINS
commands” and are used for communications between FA control devices.
(Refer to the CS/CJ/CP Series Communications Commands Reference Man-
ual for details on FINS commands.) With FINS commands it is possible to
communicate (by the command/response format) with any Unit in any network
on just by specifying the network address, node number, and unit number of
the destination Unit.
Instruction Mnemonic Function
code
Page
NETWORK SEND SEND 090 864
NETWORK RECEIVE RECV 098 870
DELIVER COMMAND CMND 490 876
EXPLICIT MESSAGE SEND EXPLT 720 883
EXPLICIT GET ATTRIBUTE EGATR 721 890
EXPLICIT SET ATTRIBUTE ESATR 722 897
EXPLICIT WORD READ ECHRD 723 903
EXPLICIT WORD WRITE ECHWR 724 907
Instruction Message content Operation
SEND(090)/
RECV(098)
Commands to transmit/
receive data
(FINS command)
CMND(490) Arbitrary commands
(FINS command)
Data reception
CPU Unit
Other device
CPU Unit,
CPU Bus Unit or
computer
Data transmission
SEND(090) or
RECV(098)
CMND(490)
Command sent
Other deviceCPU Unit
Response returned
CPU Unit,
CPU Bus Unit, or
computer