Replacing 1785-KE module to update to controllogix

SingerChemE

Member
Join Date
Feb 2007
Location
Dayton,Ohio
Posts
16
I am replacing a plc 5/40 system with a logix5562 system and I am looking for a module that will replace the 1785-KE. Currently the KE module is being used to communicate via RS485 with a PROVOX system. I will be using 3-1756DHRIO modules for remote IO, a 1756DNB, a 1756ENBT, and a 1756ENBF for replacement of the old system.
Thanks in advance!
 
RS-485 or DH-485? If DH-485, there is the 1756-DH485 module (which requires you to use a 1761-NET-AIC). If RS-485, (DF1 Protocol), Prosoft MVI56-DFCM.
 
make no assumptions

Be careful; the Provox "PCIU" unit that I expect you're connecting to has a long and complicated history of protocols and capabilities.

First, discard any thoughts of DH-485 protocol (the SLC-500 network). This is either Modbus or DF1 protocol.

Next, examine the 1785-KE's configuration and connection closely. Be certain it's a 1785-KE and not a 1771-KX1. Report on how many wires are connected and how. See if you can figure out the protocol configuration of the -KE.

If this is really a DF1 link, you could use the serial port on the controller with an appropriate signal converter (RS232 to RS485).

If you want to preserve the DF1 port for processor access, then a Prosoft card is the best choice. As mgvol indicated, the MVI56-DFCM is a DF1 protocol module for the ControlLogix chassis.
 
The communication protocol is RS485 and not DH485. The Prosoft MVI56-DFCM module is exactly what I need for my application. Thanks again mgvol and Ken.
I have been looking for a downloadable vender configuration for this module but it seems that it is only configurable by the user via Module set up guide. Is this true???
 

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