CJ1M+ETN21 Modbus TCP

[manowar]

Hello.

I'm trying to use Omron ETN21 as master for ModbusTCP protocol.

I can communicate with 1 SLAVE UNIT (standard modbusTCP slave) using FB MTCP_ETN_Client.zip  from https://www.myomron.com/index.php?action=kb&article=1245.

It works perfectly.

But I have three SLAVE UNITS to communicate to.

I'm trying to do this using [524]Modbus_TCP_FB.zip sample.

I have copied SECTION1 to SECTION2 and changed IP number and SOCKET number.

But this doesn't work.

I would realy appriciate a working sample where OMRON PLC is MASTER for THREE (or more) SLAVES.

I'm attaching code file...

Thanks.

Best regards, Andrej.

Modbus_TCP_FB.cxp

Modbus_TCP_FB.opt

[innoaloe]

Aside from changing the Socket Number and the IP Address, you also need to change the Function Block name for different connections.

So in the first section you had MUX1_Open FB. In the next section you need to give new name to the FB, e.g. MUX2_Open.

This also applies to the Send FB. Other than that I don't see why this is not possible, since I had previously used the same FBs for multiple devices with no problem

 

[manowar]

Hello.

Thanks for answer.

By multiple devices you mean maximum of 8 devices?

This is the limit of available sockets.

If you can send me an example it would be a great help.

Thanks.

Best regards.

[APerez]

On 1/7/2016 at 7:54 AM, manowar said:

Hello.

Thanks for answer.

By multiple devices you mean maximum of 8 devices?

This is the limit of available sockets.

If you can send me an example it would be a great help.

Thanks.

Best regards.

Hello, I try to establish the Modbus communication between a CJ1M+ETN21 and a gateway.
I tested the gateway using another program (kepserver driver).

In the CJ1M I use the FBs you use in this post but cant open the soket. Show error 49h.

In MUX1_Open I put:
1- Unit 0 (the ETN21 unit number)  
2- Soket 1
3- KeepAlive 1
4- TCP Port 502
5-  Gateway IP
6-  Gateway Port 502

Any idea about the possible problem....

Thanks for all.