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manowar

FINS over Network

6 posts in this topic

Hello.

I'm trying to talk with different OMRON PLCs over network.

You can do this using SEND(090)/RECV(098)/CMND(490).

I can't find any FB using IP of destination PLC.

From what I have read about FINS you only define:

- Destination network number

- Destination unit address

- Destination node number

The problem is, that I have the same node number in different IP ranges.

For example:

-          IP 192.168.1.10 (PLC Node:10) - Master

-          IP 192.168.1.50 (PLC Node:50) - Slave

-          IP 192.168.2.50 (PLC Node:50) - Slave

-          IP 192.168.3.50 (PLC Node:50) - Slave

How can I comunicate from master to slaves wich uses the same Node number 50?

Where can I define IP Address of slave unit?

I can see that Multiway is doing that without problems.

Please help.

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I guess I have to write "IP Address table" in ETN settings.

For example:

 - Node 2 =  192.168.1.50

 - Node 3 =  192.168.2.50

 - Node 4 =  192.168.3.50

And then use the NODE number as comunicating Address.

Best regards.

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Hello Manowar,

you need to prepare frame to use it with this function blocks.

For example:

D200 - numbers of words to send.

D201 - transmit to network numer xx and port of Serial Communication Board xx.

D202 - Node number xx and unit adress xx.

....

Look at instruction for these blocks. At the bottom of instruction SEND(090), you can find hints for it.

Best regards.

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12 hours ago, manowar said:

I guess I have to write "IP Address table" in ETN settings.

For example:

 - Node 2 =  192.168.1.50

 - Node 3 =  192.168.2.50

 - Node 4 =  192.168.3.50

And then use the NODE number as comunicating Address.

Best regards.

Typically, these are all on different networks (subnet of 255.255.255.0).  In that case, you would need several routers.  If you have a subnet like 255.255.0.0, then yes, you would need to set the dials on them to different node numbers and then add them to your IP Address table.  Why not just make them IP addresses like 192.168.1.50, 192.168.1.51 and 192.168.1.52 and use 255.255.255.0 as your subnet mask?  So much easier.  

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I can't put them in the same subnet. It is large existing system with different locations wich are separated by 3th IP number (1,2,3,...).

 

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If you have routers, you need to make sure the PLC has a proper default gateway to communicate across the routers.

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