Which of the following is part of troubleshooting PLC discrete outputs and devices?

Checking the voltage of the output terminal is a crucial step in troubleshooting PLC discrete outputs and devices. This process involves verifying that the output terminal is supplying the correct voltage to the connected devices, such as relays, solenoids, or other actuators. When issues arise with these devices not functioning as expected, measuring the voltage confirms whether the PLC output is operating correctly and delivering power to the intended components.

If the voltage is absent or incorrect, it indicates a problem either with the PLC's output functionality or with the wiring and connections. This allows technicians to pinpoint the source of the failure and take appropriate corrective actions, such as checking the wiring or replacing faulty components.

In contrast, forcing the inputs off involves adjusting the input conditions, which does not directly address output problems. Testing the wiring of the input device focuses on validating the input side of the system rather than the output. Resetting the PLC may temporarily resolve some issues, but it’s not a direct diagnostic method for identifying problems specifically related to output functionality. Thus, verifying the output voltage is essential for effective troubleshooting of PLC discrete outputs.