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Programmable Logical Controller Safety is a priority in the design of a PLC system. Emergency stop buttons and safety guard switches are hard-wired and must not depend on the PLC software for implementation. This is to ensure that when there is a failure of the stop switch or PLC, the system is automatically safe i.e. the system must be fail-safe. Task 2.1 Explain your reasoning in a maximum of ~300 words with an example of how a fail-safe system can be implemented with PLCs for motor control.

Author

Rosalie Bachiller

Language

EN