Search:     Advanced search


Discuss your PLC and automation problems for Allen Bradley, GE, Omron, Mitsubishi, Modicon, Panel Views, RS View, ABB, Adept Robots, Cognex etc. You can also submit and download sample PLC code.

If our forums and knowledge base still hasn't got your PLC operational, we recommend contacting PDF Supply and Electric for PLC repair and replacement parts.

How to Connect to a GE 90-30 PLC with VersaPro

Article ID: 50
Last updated: 13 Oct, 2010

Sometimes MrPLC gets a lot of questions from first time PLC programmers on how to connect your software package to a PLC. Hopefully by the end of this article you can see how easy it is to connect to a GE 90-30 PLC.


This article references a GE 90-30 PLC and VersaPro programming software version 2.0. I know that VersaPro is not the latest and greatest GE software on the market, Cimplicity Machine Edition is current, however GE informed me that VersaPro will be around for awhile yet and there are still tons of people that use this software to program GE PLCs.


The first thing you'll need to do is setup the COM port for a 90-30 PLC. The factory default settings for PLC serial communications are 19200 Baud, ODD Parity, 1 Stop Bit. To get to the COM port setup in VersaPro, click on Tools then Communications Setup.




Next you'll need to add a new device to connect. Type a generic name and select 90-30 in the pull down list. Map this new device to the COM1 settings you just setup. No other settings are required in this screen.


Finally open up your PLC job folder, and select PLC, connect. You'll notice that the new device you just created will be in the PLC connection list. Highlight the device and click on connect. Make sure your programming cable is connected to the GE 90-30 PLC and your COM1 port on your laptop.



Once your connected with your PLC. You can look at the lower right hand side of VersaPro and see the status on your PLC and VersaPro software.



Logic Equal means that you should be able to browse your ladder and see a live online view of your ladder instructions. If you see a Logic not Equal, you'll have to decide if you need to download what is in your laptop to the PLC or upload from the PLC to your laptop. As a general run of thumb, you probably should always UPLOAD what is current in the PLC to your laptop because you never know who might have been messing around in the PLC before you arrived. So it's best to upload the most current copy of logic to your laptop. Make backup of both what you have and current uploads from PLCs. This might get you out of a jam later.


This "How To" has a video that can be downloaded here.
Article ID: 50
Last updated: 13 Oct, 2010
Revision: 1
Views: 12961
Comments: 3
This article was:   Helpful | Not helpful
Prev   Next
Tutorials     How to Convert GE 90-30 LogicMaster 90 Programs to VersaPro

Steve Bailey | 09 May, 2004 12:00 AM

Once you've set up your communications per your instructions, you can set up VersaPro to autoconnect.

Click on the 'Tools' menu and then 'Options'. Select the 'Communications' tab and check the 'Enable Autoconnect' box. Select the device (GE90-30 in your example) to use for communications and a location on your hard drive for VersaPro to look for program folders.

When VersaPro starts, it will attempt to open a communications link with the PLC you're connected to. If that is successful, VP will read the program name from the PLC and search the specified location for a folder with the same name. If it finds a match, it will check for equality between the folder and the PLC. If all is well, once VP is launched, you'll be communicating with the PLC and you'll have the proper folder selected so you'll have annotation available.
Posted: 14 years ago   | Permalink
Chris Elston | 10 May, 2004 12:00 AM
Thanks Steve for this wonderful adder tip. I honestly have to say that I've never tried it myself, but Monday morning I will enable the Auto Connect feature. Thanks for sharing your TIP!
Posted: 14 years ago   | Permalink
hgbcn | 31 Dec, 2005 12:00 AM
Several days ago my colleagues failed to connect the GE 90-30 PLC with a Dell M850 laptop with WINDOWS XP,final I found that they had tried to connect two laptops via the RS232 ports.The M850 RS232 port was occupied and of course they could connect the 90-30 PLC.What I want mention here is that we have to make sure that the RS232 port is available before we try to use it.Always,the RSlinx will occupy the RS232 port when the PC starts.
Posted: 12 years 4 months ago   | Permalink

Prev   Next
Tutorials     How to Convert GE 90-30 LogicMaster 90 Programs to VersaPro