Sign in to follow this  
Followers 0
dumdum

AB Ml1100 and omron MX2, Modbus com.

3 posts in this topic

Hi I want to control a MX2 inverter with a Micrologix 1100 using modbus. I have used this guide for setting up the PLC: http://www.infoplc.net/files/descargas/rockwell/infoplc_net_PowerFlex70_MicroLogix1100_Modbus_RTU.pdf And this guide for setting the inverter http://www.proenergo.ru/doc_pdf/drives-doc/mx2/MX2+UsersManual.pdf I have wired the 1763-NC01 cable: Terminal A to SP on the inverter Terminal B to SN on the inverter The mx2 dip switch is turned ON. But i cant even get the ml1100 comm0 light to flash. What am i doing wrong?

Share this post


Link to post
Share on other sites
Is it even possible to communicate with modbus RTU between the two devices?

Share this post


Link to post
Share on other sites
I use a generic Modbus master on a PC with a USB-RS-485 converter to establish communications the slave (drive), read a register and write a register. That comfirms that the slave does functional Modbus. It sounds like a lot of work, but that way you know one device is up and talking and under what conditions. Otherwise, you're stuck asking, is it even possible? A is usually (-) or D-, B is usually (+) or D+. But not always. Sometimes the labeling is the opposite. so one thing to test is to swap the lines on one end. But you need to get the 485 line LEDs blinking first, and I can't help you with the uLogix end.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0