Siemens SINAMICS S120 Function Manual page 665

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Parameterization of the tolerance time

In order to avoid that faults are incorrectly initiated, at these inputs the tolerance time must

always be set shorter than the shortest time between two switching events (ON/OFF, OFF/ON).

● If the monitoring functions are not selected/deselected within the tolerance time, this is

detected by the cross-check, and the following fault (STOP F) is output.

– F01611 (Basic Functions)

– C01770 (Extended / Advanced Functions)

For STO, the following applies: In this case, the pulses have already been canceled as a

result of the selection of "Safe Torque Off" on one channel.

Timing between the switching operations in the Basic Functions

Message F01611 with fault value 1000 is output if switching operations occur too frequently.

The cause depends on the type of control:

● Persistent signal changes occurred at the F-DI.

● STO was permanently triggered via PROFIsafe (also as subsequent response).

Within the time 5 · p9650, there must be at least two switching operations at the terminals

or via PROFIsafe with a minimum time between them of p9650.

● If the "Safe Stop 1" of the Basic Functions is not selected within the tolerance time in two

channels, this is detected by the cross-check, and fault F01611 (STOP F) is output. After the

set "SI Safe Stop 1 delay time" (p9652), the pulses are suppressed.

In order that the drive can brake down to a standstill even when selected through one

channel, the time in p9652 must be shorter than the sum of the parameters for the data

cross-check (p9650 and p9658). Otherwise, the drive will coast down after the time p9650

+ p9658 has elapsed.

Further notes for setting the discrepancy time (also see the following diagram "Discrepancy

time") are provided in the "SINAMICS S120/S150 List Manual" for the following message:

● F01611 (Basic Functions)

● C01770 (Extended / Advanced Functions)

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

11.8 Controlling via terminals on the Control Unit and Motor/Power Module

Safety Integrated Basic Functions