ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
155
Response Times
D
D.1 Response Times
Introduction
The response times of the ET 200pro fail-safe modules are presented below. The response
times of the fail-safe modules enter into the calculation of the F-system response time.
For information on calculating the F-system response time, refer to the
Safety Engineering in
SIMATIC S7
system description.
Definition of Response Time
The response time is the time between detection of an input signal and a change in the
gated output signal.
The actual response time lies somewhere between a minimum and maximum response time.
The maximum response time must always be anticipated when configuring a system.
For fail-safe digital inputs: The response time is the time between a signal change at the
digital input and safe loading of the -> safety message frame on the backplane bus.
For fail-safe digital outputs: The response time is the time between an incoming safety
message frame from the backplane bus and the signal change at the digital output.
Maximum Response Time of the 8/16 F-DI DC24V PROFIsafe, the Inputs of the
4/8 F-DI/4 F-DO DC24V/2A PROFIsafe, and the F-Switch PROFIsafe
In the case of problem-free operation:
Table D-1 In the Case of Problem-Free Operation
Assigned input delay
Electronic module Short-circuit test parameter
0.5 ms 3 ms 15 ms
Disabled 10 ms 13 ms 25 ms 8/16 F-DI
Enabled 10 ms 18 ms 56 ms
Disabled 11 ms 13 ms 25 ms 4/8 F-DI/4 F-DO
Enabled 11 ms 20 ms 57 ms
Disabled - 14 ms - F-Switch
PROFIsafe
Enabled - 27 ms -
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