Fatal faults are serious errors of the system that deactivate the automatic mode when the condition of a linked variable occurs. For example, the input signal of a circuit breaker is linked to the variable xCMZ_1. This variable of data type bool is false in operation until the input signal of the circuit breaker assumes the value true. As a result, the automatic mode is deactivated immediately. Such a serious error must be corrected before manual enabling of the system is possible again. Serious errors cannot be bypassed.
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