My Allen-Bradley PLC has some red blinking lights. Now what?

So your SCADA system isn’t working properly and you don’t know why. But you notice a bunch of red LEDs on your PLC and think to yourself, “Gee, aren’t those red LEDs usually green?” You’re right they are usually green and are supposed to be green under normal circumstances. Being able to read these status codes and provide them to our service techs can save time by letting our service techs know what to expect when they arrive. Get a Troubleshooting Guide here.