PLC to PLC communication using built in ethernet

[Heuve]

Hello all,

I'm trying to send data between 2 Q06UDEH PLC's using the built in Ethernet port. I'm using the SOCSND and SOCRCV commands and have successfully sent a command, but the received data is not correct. I think my problem is with the send frame I've built, but I can't figure out what I did wrong. If someone has an example I could use to set up the frame it would be very appreciated!

Thanks,

[collinsd70]

Welcome Heuve.

Found this manual with some examples in LAD and IL, hope it helps.

http://www.accs.cz/Files/FA/PLC/QnUCPU_User_s_Manual_Communication_via_Built_in_Ethernet_Port.pdf

 

Regards

 

Daniel

[Heuve]

Hey thanks, I've seen that manual but it doesn't actually describe how to set up the frame (just uses 12345678901 as an example). The way I tried setting it up is on page 42 of this manual: 

http://dl.mitsubishielectric.com/dl/fa/document/manual/plc/sh080008/sh080008x.pdf

And here's the frame I come up with:

5000

00FF FF03 00

0800

0000

0104 0100 B80B 0090 0800

Doesn't seem to work though

[Heuve]

Sorry,  I should add I'm trying to use the MC protocol on the PLC that has the data I'm trying to read. If possible I don't want to do any programming on the second PLC, just set up one of the ports to MC protocol.

[WattUp]

EthernetLink.gxw

 

I have posted this example in the past. It is not using SOCSEND/RECV  but using the GP.READ i was able to get reliable communication between 2 PLCs.

Only requires the one PLC to be modified, and you pick what addresses you want to read/write to on the other PLC.