Message Service

[edpuente 0]

Hi: I have a 4 cj1m plc in a clk network with a cqm1h. I want to send info back and forth with the cqm1h only with one cj1m using send and recv instructions. Do I have to write only a send command in one PLC, or I need to program the recv instruction in the receiving data plc.? Since I already have the 4 CJ1M trough datalinks, is it possible to send messages without collison of data? Regards And have agreat day.

[Michael Walsh 268]

You need to do a send on 1 PLC or a Receive on the other, not both. It is kind of like read or write. There will be no problems with collisions.

[lostcontrol 23]

You could probably even use the in-built PLC-PLC links, think that will work between 2x PLC serial ports... Edited 18 Jan 2013 by lostcontrol

[edpuente 0]

Thank You! I could not make it work. I guess it has problems if you want to use datalinks and send or recv at the same time. I just decided to use datalinks. it was easier to do by me.