Communicating Between Omron Plcs; Communications Specifications - Omron CJ1W-ETN21 - 04-2009 Operation Manual

Communicating between OMRON PLCs

6-6

Communicating between OMRON PLCs

6-6-1

Communications Specifications

CX-Programmer's Unit Setup
Setup Tab
Item
Broadcast All ones (4.3BSD)
FINS/TCP port Default (9600)
IP address 0.0.0.0 (Use default IP address.)
Subnet mask 0.0.0.0
Baud rate Automatic detection
IP router tables None
FINS/TCP Tab
Not set. (All defaults are used.)
FinsGateway ETN_UNIT Setup
TCP Nodes Tab: Ethernet Node Definition Dialog Box
Item
Node address
IP address
Destination port number
Keep-alive setting
FINS commands can be sent from the user's ladder-diagram program in the
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.
Item
Destination 1:1
1:N
Data length 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)
Setting
Setting
2
192.168.250.2
9600
Selected (yes)
Specifications
SEND(090), RECV(098), CMND(490) instructions
SEND(090), CMND(490) instructions (broadcasting)
Section 6-6
137