Response Times - Siemens SIMATIC ET 200S Installation And Operating Manual

Response Times

D
Introduction
The response times of ET 200S fail-safe modules are presented below. The response times
of fail-safe modules are included in the calculation of F-system response time.
You will find information about the calculation of F-system response times in the
Engineering in SIMATIC S7
Definition of Response Time
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 PM-E F pm DC24V PROFIsafe
The maximum response time of the PM-E F pm DC24V PROFIsafe (without a fault and
when a fault exists) corresponds to the maximum internal conditioning time T
The internal conditioning times of the electronic PM channel depend on the readback time
parameter setting (see table below).
Table D-1
PM-E F pm DC24V PROFIsafe (electronic PM channel)
ET 200S Distributed I/O System - Fail-Safe Modules
Hardware Installation and Operating Manual, 07/2005, A5E00103686-04
PM-E F pm DC24V PROFIsafe: Internal processing times of the electronic PM channel
Set Readback Limit Frequency
Time
1 ms 32.3 Hz
5 ms 28.6 Hz
10 ms 25.0 Hz
50 ms 12.5 Hz
100 ms
200 ms
400 ms
system description.
Minimum internal processing
7.7 Hz
4.3 Hz
2.3 Hz
time T
min
4 ms
4 ms
4 ms
4 ms
4 ms
4 ms
4 ms
D
Safety
.
max
Maximum internal
processing time T
max
16 ms
20 ms
25 ms
55 ms
90 ms
150 ms
300 ms
D-1