Siemens SIMATIC - Page 157

Response Times
D.1 Response Times
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
157
Maximum Response Time of the Outputs of the 4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electronic
Module
The maximum response time of the outputs of the 4/8 F-DI/4 F-DO DC24V/2A
PROFIsafe electronic module (in the fault-free case and when a fault occurs) corresponds to
the maximum internal preprocessing time T
max
.
The internal preprocessing times depend on the assigned readback time (see table below).
Table D-4 4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electronic Module: Internal Preprocessing Times
4/8 F-DI/4 F-DO DC24V/2A PROFIsafe Electronic Module
Assigned
Readback Time
Limit Frequency Minimum Internal
Preprocessing Time T
min
Maximum Internal
Preprocessing Time T
max
1 ms 62.5 Hz 4 ms 13 ms
5 ms 50.0 Hz 4 ms 14 ms
10 ms 40.0 Hz 4 ms 17 ms
50 ms 15.4 Hz 4 ms 30 ms
100 ms 8.7 Hz 4 ms 46 ms
200 ms 4.6 Hz 4 ms 71 ms
400 ms 2.4 Hz 4 ms 135 ms
Maximum Response Time of Outputs of the F-Switch PROFIsafe Electronic Module
The maximum response time of the outputs of the F-Switch PROFIsafe electronic module
(with or without fault) is equivalent to the maximum internal preprocessing time T
max
.
The internal preprocessing times depend on the assigned readback time (see table below).
Table D-5 F-Switch PROFIsafe Electronic Module: Internal Preprocessing Time
F-Switch PROFIsafe Electronic Module
Assigned
Readback Time
Limit Frequency Minimum Internal
Preprocessing Time T
min
Maximum Internal
Preprocessing Time T
max
3 ms 45.4 Hz 4 ms 11 ms