HB-37350-810-01-50F-EN PSC1-C-10 Installation manual V2.1.docx Page 133 of 189
Version: 50F
Logic processing:
The following evaluation is to be undertaken in both channels:
6 Response times of the PSC1
The response time is an important safety-related property and must be taken into account for
each application / safety function. In the following section the response times for individual
functions, in some case also as a function of other parameters, are listed. If this information is
inadequate for a specific application, the actual response is to be validated against the
required behaviour by means of specific measurements. This statement applies in particular
also to the usage of filter functions.
Safety instructions:
The response times are to be defined for each safety function in the required behaviour
and compared against the actual value with the aid of the following information.
Particular care is required on the usage of filter functions. Depending on the filter
length / filter time, the response time may be significantly extended; this aspect must
be taken into account in the safety-related design.
In particularly critical tasks, the response is to be validated by means of
measurements.
On device startup / alarm or error reset, in some circumstances (depending on the
application program) the outputs may become active for the duration of the response
time. This aspect must be taken into account on planning the safety functions
On the usage of safe fieldbus connections (e.g. PROFIsafe, FSoE) the system
propagation time (watchdog) is to be included in the calculation.
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