IC693ALG390 How-to Troubleshoot GE Fanuc PLC 90-30 Proficy Machine Edition Programming Tutorial

Introduction: GE Fanuc IC693ALG390 Troubleshooting Guide

This troubleshooting guide is a test of an IC693ALG390. This is an analog output, 2 channels, and its scale is negative 10 to positive 10 volt DC output. It’s in an IC693CHS397 5 slot rack. Which is otherwise empty. It’s being powered by an IC693PWR330 power supply and the processor is an IC693CPU374 plus

Step 1: Preparing for the Test of ALG 390

In this guide you will learn to how to test the ALG390 and how to configure it in Proficy Machine Edition.
Begin with the processor in run mode. There is an option to use a 24 volt power supply; this option is not illustrated in this troubleshooting guide and my Proficy Machine Edition settings reflect this. Illustrated is a power supply from the back plate.
In Proficy Machine Edition you should have the software configured the same way, to reflect the setup, the physical configuration in front of you in the image above including a CHS397, 5-slot rack as the main rack, the PWR330 power supply, CPU374 central processor, and ALG390 in slot number 2.

Step 2: Open Slot #2, Obtain Reference Address

So, if you open slot number 2 by double clicking on slot 2 or you could right click on slot 2 and select configure, there’s nothing really to configure on the ALG390. However, you do want to pay attention to your reference address is so that when you put a value into your analog output table, it’s able to go to the proper destination and you’re able to get a proper reading if the module is in good working condition.
What you should do is open up a new file, a blank file, and it will automatically give you percent AQ. Which is analog output 0001. So your reference address starts on 0001 and will end on 0002 since this is only a 2 channel output.

Step #3: Go to Reference Tables

Now you’re going to go to your reference view tables and expand that. Below that is default tables. You’re going to expand that. And the second selection down is percent AQ or analog output. You could either double click on that or right click and open and then you’re looking at your output table.
The top right hand corner is where the addresses start at analog output 0001. And you should place the value of 32k or 32,000 in both addresses, 0001 and 2. And what you’re hoping to see is the full scale of the output.

Now for Channels 1 and 2 (see above). Channel 1 is on terminals 3 and 5. That means the 3 would be positive, 5 is negative or, as they call it, common. Channel 2, 4 is positive and 6 is negative or common.

Now you’re going to place your terminals on channel number 1 and using a multi-meter (see above), you’re able to read your voltage, 10 volts DC. Which is correct. Then you’re going to go to channel 2, again terminals 4 and 6 and again 10 volts.
Now another thing you want to do is to exercise some of that range. So you’ll drop the value by half and from 32,000 to a value of 16,000 and now you should be getting a voltage reading of 5 volts. Half of 10 is 5.
No you can go even further and put in a value of 8,000, cutting the 16,000 in half, and obviously the number you are looking for is 2-1/2 volts. You could go all the way down, 4,000 or 2,000 if you want. Finally you should put in a 0 and make sure that there is no value when you touch the terminals, ie: a perfect 0.000.
Make sure you do this on both channels to make sure that, again, you’re exercising its full range of ability to make sure it’s a good working device and it’s not simply just stuck in the full mode.

Step 4: Addtional Steps if Necessary

So that is the entire test. Other than this:

• if the channels are not operating at all or
• if they give you a full value no matter what numerals you put into your output table, the analog output table, or
• if the okay light is off.

Any of those three things would just constitute a bad module.

Tags: GE Fanuc, IC693ALG390, Troubleshooting Guide

This entry was posted on April 23rd, 2015 and is filed under GE Fanuc, Troubleshooting Guide. Both comments and pings are currently closed.