Siemens SINAMICS S120 Function Manual page 670

Safety Integrated Basic Functions
11.9 Control via TM54F
● Configurable connection of NC contact/NC contact or NC contact/NO contact using p10040
● Status parameter r10051
● Adjustable time window for monitoring discrepancy at both digital inputs by means of
parameter p10002 for all F-DIs
Note
Discrepancy time
To avoid that fault messages are incorrectly triggered ("nuisance tripping"), at these inputs the
discrepancy time must always be set less than the shortest time between 2 switching events
(ON/OFF, OFF/ON) (see also the following diagram "Discrepancy time").
Further notes for setting the discrepancy time are contained in the "SINAMICS S120/S150 List
Manual" for the following messages:
● F01611 (Basic Functions)
● C01770 (Extended / Advanced Functions)
T
S
T
D
T
R
Figure 11-6
● Second digital input with additional tap of the optocoupler cathode for connecting a ground-
switching output of a fail-safe controller.
● The signal states of the two digital inputs of the F-DIs are frozen at logical 0 (safety function
selected) when different signal states are present within a failsafe F-DI until a safe
acknowledgment has been carried out by means of an F-DI via parameter p10006 (SI
acknowledgment internal event input terminal).
● The monitoring time (p10002) for the discrepancy of the two digital inputs of an F-DI may
have to be increased so that switching operations do not trigger an undesired response,
thereby necessitating a safe acknowledgment. Therefore, the signal states at the two
associated digital inputs (F-DI) must have the same state within this monitoring time,
otherwise the following fault will be output F35151 "TM54F: Discrepancy error". This
requires safe acknowledgment.
668
Switching interval
Discrepancy time
Response time
Discrepancy time
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions