worst case elapsed time following an actuation of a safety sensor connected to a fieldbus, until the corresponding safe state of its safety actuator(s) is achieved in the presence of errors or failures in the safety function

Note 1 to entry: This concept is introduced in IEC 617843:2021, 5.2.4 and is addressed by the functional safety communication profiles defined in the IEC 61784-3 series of documents.

[SOURCE: IEC 61784-3:2021, 3.1.44]