What does Fail-Safe PLC mean?
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A statement regarding the electrical scope of the owner: PLCs or fail-safe PLCs shall be used to implement regulatory requirements, provide equipment protection, as well as handle switching and safety interlocks, unless otherwise specified in the equipment specifications. Unless otherwise stated in the equipment specifications, the owner uses PLCs or fail-safe PLCs for adjustments, equipment protection, and the operation of switching and safety interlock systems. I’m not sure if this understanding is correct, especially regarding the Fail Safe PLC; please let professionals point out any mistakes if there are any.
Unless otherwise specified in the equipment specifications, control, equipment protection, switching, and safety interlock system operations shall be carried out via a PLC or a fail-safe PLC (fault-tolerant PLC).
Fail-safe is a widely used and ambiguous common phrase. Its meaning should be a mechanism to ensure safety in the event of a failure, and the meaning of safety may vary in different environments. Adjective, translated as: error-safe, fault-safe, automatically fault-resistant: lol
For fail-safe PLCs, for such professional questions, the original poster can ask in the instrumentation section, where the answers might be more professional.
PLC = Programmable Logic Controller, a type of programmable control device; it’s easy to find out its full name if you know any of the words that make up it. Fail Safe PLC refers to a Programmable Logic Controller with fail-safe features