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
-
