2.8 Communications with an OMRON PLC (FINS Communications Service)
Using Automatic Reception with the MP3000 as a Slave
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7. Create ladder programming for network transmissions.
To write data to a node on the network, use the SEND instruction. The following is an example of the set-
tings for a SEND instruction.
When using the SEND instruction, create any logic necessary to interlock with other processes and to
adjust the timing of the execution.
Note: Refer to the following manuals for details on ladder programming with the SEND, RECV, and CMND
instructions for network communications.
SYSMAC CS/CJ-series Ethernet Units Operation Manual from OMRON Corporation
SYSMAC CS/CJ/NSJ-series Programmable Controllers Instructions Reference Manual from OMRON Corpora-
tion
This concludes the setup.
Starting Communications
Use the following procedure to write the data in the DM Area in the OMRON PLC to the hold registers in
the MP3000.
1. Turn ON the power to the MP3000 to start receiving messages.
The system will automatically start the message reception operation. No further operation is required.
2. Start the message send operation on the OMRON PLC.
Note: The MP3000 will wait for the TCP connection after it starts the automatic reception operation. Therefore, the
power supply to the MP3000 must be turned ON before the power supply to the OMRON PLC.
Set the first word in the OMRON PLC local node.
Example: Sending 100 words from D00000.
Set the first destination word in the MP3000.
Example: “D00000” causes the MP3000 to start receiving from MW00000.
Set the first word of the control data.
Example: The settings in the following table are set as the control data from D10000.
Word Meaning Meaning
0064 hex Number of words to send = 100 words
0000 hex Destination network address = 00 (local)
0100 hex
Destination node address = 1
Destination unit address = 00
0701 hex
Response = Required.
Communications port number used = 7, Number of retries = 1
0014 hex
D10000
SEND
D00000
D00000
D10000
D10001
D10002
D10003
D10004 Response monitor time = 20 (2 seconds)
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