![]() ![]() 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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