Introduction
There’s nothing quite like the pit in your stomach when you see an angry, flashing fault light on a PLC. Your mind races—is it a major failure? Hours of downtime? For technicians and engineers working with the Allen Bradley MicroLogix 1400 1766-L32AWAA PLC, one of the most common culprits behind that light is Error 187h. But here’s the good news: this error is...
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