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Electrical Troubleshooting Quiz - December 13, 2016

The PLC is rarely the problem in a PLC-controlled system.

The speed of a production line dropped considerably. The responding maintenance technician is an electronics guy. He checked everything in the programmable logic controller (PLC), and found no problems. All settings match the spec sheet, and the system isn’t showing any errors. Using a digital multimeter (DMM), he verified the desired 11.8mA on the output module terminals. Just as a test, he raised the setting on the line speed and the line was able to get up to the desired speed. He

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