You are not registered yet. Please click here to register!

plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!

Go Back - Interactive Q & A > - Interactive Q & A > LIVE PLC Questions And Answers

Thread Tools Display Modes
Old October 11th, 2019, 11:26 PM   #1
Papua New Guinea

rudan206 is offline
Join Date: Oct 2013
Location: Rabaul
Posts: 1
micrologix 1200 C series Modbus configs

I've got a ML 1200 C series with only 1 port and would like to connect to our DCS via Modbus. Since there's only one port, I've decided to employ a 1761-NET-AIC+ to provide for extra ports for Modbus and programming. Problem now is how to get PLC configured for Modbus. I can change the channel from DF1 Full Duplex to Modbus RTU Slave but then I won't have any port for programming.
  Reply With Quote
Old October 11th, 2019, 11:43 PM   #2
Ken Roach
Lifetime Supporting Member + Moderator
United States

Ken Roach is offline
Ken Roach's Avatar
Join Date: Apr 2002
Location: Seattle, WA
Posts: 15,336
Welcome to the PLCTalk forum community !

You have identified the basic issue: the controller has just one port and can only be configured for one protocol at a time. You cannot simultaneously go online to monitor the controller and have it connected to the DCS via Modbus.

The "R" version of the MicroLogix 1200 with a second serial port, or the Ethernet-equipped MicroLogix 1100 or 1400 controllers would be required for that functionality.

If you can tolerate using the DCOMM button to switch to DF1 Full Duplex when you need to download or monitor, then you can make use of this controller.
  Reply With Quote
Jump to Live PLC Question and Answer Forum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
Micrologix 1200 to Micrologix 1400/PVP 600 woody400 LIVE PLC Questions And Answers 8 September 19th, 2019 05:12 AM
Ethernet TCP/IP and Allen-Bradley CompactLogix (RSlogix 5000) CAAJ LIVE PLC Questions And Answers 14 December 18th, 2015 12:46 PM
MODBUS on micrologix 1400 and Multiranger 100 Phillyblunz LIVE PLC Questions And Answers 16 February 25th, 2013 01:46 AM
Indirect MicroLogix 1200 Communication bkrupp LIVE PLC Questions And Answers 4 October 30th, 2012 06:31 PM
Micrologix 1200 Modbus lucianozanollo LIVE PLC Questions And Answers 0 April 21st, 2006 02:07 PM

All times are GMT -4. The time now is 07:41 PM.