Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 203

Note
Please note that the Excel files for calculating the maximum response times (
s7ftimea.xls
already support calculation of the extension of the "Maximum response time in the event of a
fault" by the programmed discrepancy time.
Maximum response time of the EM 4 F-DI/3 F-DO DC24V PROFIsafe
Formula for calculating the maximum response time if there is no fault:
maximum response time
without a fault = T
*: Short-circuit test time = 2 x input delay
Parameters for the input delay and the short-circuit test are assigned in
Table D- 7
Evaluation of the Sensors
1oo2
Maximum response time if a fault occurs:
The table below contains the maximum response times of the F-DI/F-DO module when a
fault occurs, depending on the parameter settings in
Table D- 8
*: The response times with 1oo2 evaluation also depend on the configured discrepancy behavior:
Provide 0 value: The times defined in the table above apply.
Provide last valid value: The times in the table above are extended by the programmed discrepancy
time.
Note
Please note that the Excel files for calculating the maximum response times (
s7ftimea.xls
already support calculation of the extension of the "Maximum response time in the event of a
fault" by the programmed discrepancy time.
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
S7 Distributed Safety
) included with the
+ input delay + short-circuit test time*
max
EM 4 F-DI/3 F-DO DC24V PROFIsafe: Internal Processing Times
EM 4 F-DI/3 F-DO DC24V PROFIsafe: Maximum Response Time if a Fault Occurs
Input Delay
Short-circuit test deactivated
Short-circuit test activated
S7 Distributed Safety
) included with the
S7 F/FH Systems
and
minimum internal processing
time T
min
4 ms
STEP 7
1oo2 evaluation*
S7 F/FH Systems
and
Response times
s7fcotia.xls
option packages
STEP 7
.
maximum internal
processing time T
9 ms
and on the sensor evaluation.
3 ms
14 ms
22 ms
s7fcotia.xls
option packages
and
max
and
203