ABB AC500-S Safety User Manual page 198

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Configuration and programming

AC500-S libraries > SafetyBlocks_PLCopen_AC500_v22.lib

Fig. 88: Typical timing diagram for SF_Equivalent

The function block monitors the discrepancy time between channel A and B, when switching to

TRUE and also when switching to FALSE.

Error behavior

S_EquivalentOut is set to FALSE. Error is set to TRUE. DiagCode indicates the error states.

There is no reset defined as an input is coupled with the reset of an error. If an error occurs in

the inputs, a new set of inputs with correct S_EquivalentOut must be able to reset the error flag.

(Example: if a switch is faulty and replaced, using the switch again results in a correct output.)

3ADR025091M0208, 12, en_US