![]() – Power cycling the controller or the entire SLC 500 rack. – Switching controller mode from RUN to STOP then back to There are ways to remove error from a faulted controller. ![]() Top priority that the FAULT message be identified before trying to remove theĮrror or else, it will simply return. When the FAULT LED is activated, this prompts the user to take action. Similarly, other controller states such as Battery status, I/O status, communicationĪnd controller modes are indicated by the energization states of each Generally, faults are made known when the CPU FAULT or FLT LED is energized Self-diagnostics, the controller is able to detect the operational status ofĮvery member module and report this externally through varying behavior ofīuilt-in LED indicators and internally via the diagnostic buffer.Ī SLC 500 controller is provided with LED indicators such as: Programmable Logic Controllers (PLC) such as Allen-Bradley’s SLC 500 Modular orįixed style hardware are designed with capability of self-diagnostics. ![]() Troubleshooting Tutorial: Common SLC 500 Faults – Part 1
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