BRX to BRX Coms

[MBAutomation]

Hello,

I am trying to get 4 BRX PLC's to talk.  I would like to use Do More! Protocol.  RX/WX.  My main PLC has an Ethernet POM as well as the standard built-in ethernet port.   I am a little confused with the instructions on how to set this up.   

in the attached picture what needs to be set up to make this work?

Thank you

[brucek]

Only thing you need in that picture is the IP Address configured. Just use the RX or WX and it has a spot for the IP address of the PLC you want to talk to and what data bits you want to share (has to be bytes).  I like to put the RX and WX in 1 PLC so its easy to find but i only have used it in 2 plc's talking so might not be doable for you.

There is also Peerlink if you don't have a lot of data to move and it is auto triggered every 100 ms if you don't need faster data transfers. This is the Cat's A$$.

[MBAutomation]

Thanks for your reply.  I should have put a picture of what I had so far.   see attached.  I have a bunch of data in the D area, and it is currently showing that it failed.  The error only shows 0. So, I'm assuming it's some kind of setting. Do both PLC's ports need to be on port 28784. If so, which location do I change that in?  there are several.    Do I also need to enable any of the Modbus/TCP or ethernet IP settings to do this?

[brucek]

Ok first you have the extended error info D1, is also part of the numbers your moving so I'd make that D25 or some other number. All you need is 1 of these to do the comms. Not sure if you are doing this or not but just in case if you use RX in PLC 1 you don't need a WX in PLC 2 the RX does it all. In the set ups i have done i use all RX's in 1 PLC to take data from the remote PLC ( I call 1 the master and other remote, probably not accurate  but its how i think of it).

The port number should be the default because your using IP addresses to differentiate the PLC's. You do have to set up the device if you haven't on the top line.

Also i'm assuming you have your plc's as 192.168.1.55, 192.168.1.56, ... and not 192.168.2.55, 192.168.3.55 i'm sure you can make that work but for me its easiest to keep all the first 3 numbers the same and just change the 4th.

[brucek]

I have to head out of the office got a 3 hour ride up north and 3 hours back later so hopefully this points you in the right direction and if i'm wrong on anything bob or franj will prob be on to correct me shortly.

[MBAutomation]

Thanks for your help! I appreciate it.   I did change the locations.  Read from is D25 into local is now D0.  It still did not like this.

Again, thank you!

[MBAutomation]

Hey, I figured it out.   It was a completely stupid one.    I didn't have Run function to run it.  Weird how that makes things work so well.  Thanks again.


I do have a question.  Which is better to use,  Do more protocol or Peerlink?

[BobO]

I do have a question.  Which is better to use,  Do more protocol or Peerlink?

Depends on your needs. If all you need to do is share some memory between a handful of PLCs, and you don't need it faster than about 100ms, Peerlink is falling-off-a-log easy. If you need it faster, or you need/want to access specific tags or memory types, or you need to handshake, etc, RX/WX is more powerful.