ControlLogix and Modbus RTU

[mjrx 1]

Just wanted to get an opinion from the experts here, what is the easiest way to implement a ControlLogix 1769 as a Modbus serial RTU master. I have looked at Rockwell technote and read the ProSoft manual for the MVI69-MCM card. I have heard some say the ProSoft is a much easier way to go and using the .acd from Rockwell can be a bit hairy. Neither looks "simple", the .acd master method doesn't look a whole lot harder to do than the ProSoft. Can anyone comment?

[mjrx 1]

My mistake, I actually meant "CompactLogix"

[mikey431 3]

Prosoft 's modbus module ,to me, is pretty neat. It is easy to use and setup. For setting up as master,you just have to follow instructions on manual to import/copy program code, setup up modbus settings and config/write data to the predefined modbus addresses.That is about it.They also provide you cable and instructions on how to test/check the communication. Edited 18 Jul 2014 by mikey431

[Ken Roach 194]

I'm an expert in ControlLogix and have taught classes on Modbus implementation and troubleshooting, and I would go with the Prosoft module every time. If you haven't revisited Prosoft's lineup for CompactLogix lately, have a look: http://www.prosoft-technology.com/Landing-Pages/ProSoft-Technology-introduces-Scalable-Modbus-R-Solutions-for-CompactLogix The 'Lite" version is especially good when you're weighing the hardware cost versus the time/complexity of implementation and troubleshooting.