MSG command for AB PLC-5's ?

[DASKAT]

Hi folks
I am attempting to share data between 2 AB PLC-5's I have tried to no avail to send one simple word between them. Both PLC's are on the same DH network. I continueously get an error message that I have not correctly formatted the control block. The questions I have are 1) Is this command permitted durring online programing.2) do both the sending and recieving PLC's require to have the message command. Any other tips on the MSG command would be helpful.

 

[jonesy29847]

To answer your questions;

1. I was offline when I porgrammed the instruction.

2. The instruction only needs to be in one processor.

The setup screen should be helpful. Be sure the processor station number are different. The control block is in Integer memory and I don't recall needing to do much with it. I set up N:100 for the control block which was not used elsewhere, hence needing to be offline.

You may also want to try dedicating a new file for your application.

 

[DASKAT]

Jonesy Thanks
I finially got it to work and have made the following observations. 1) The control block is at least 10 words long so don't have the control block in the same file as the words being transfered. 2) Yes this command can be programmed online using RSLogix 5. so again thanks
and have a great day
TTFN
THE KAT