Siemens SINAMICS S120 Function Manual page 101

Commissioning
The delay time (SS1 time) is set by entering parameter p9556. The wait time until safe pulse
suppression (STO) can be shortened by specifying a shutdown speed in p9560.
To enable the drive to brake to standstill after selection, the time in p9556 must be selected
to be large enough for the drive to be able to brake along the OFF3 ramp (p1135) from any
speed of the work process to below the shutdown speed (p9560).
Note
Setting the delay time
To enable the drive to travel the entire OFF3 ramp and close any existing motor holding
brake, you must set the delay time as follows:
• Motor holding brake parameterized: Delay time ≥ p1135 + p1228 + p1217
• Motor holding brake not parameterized: Delay time ≥ p1135 + p1228
The shutdown speed defined in p9560 must be set in such a way that coasting down (due to
the subsequent STO function) does not represent any risk for man and machine.
Responses: System error
1. STOP F with subsequent STOP B, followed by STOP A
2. Safety message C01711
Status for "Safe Stop 1"
The status of the "Safe Stop 1" function is displayed using the following parameters:
● r9722.1 CO/BO: SI Motion drive-integrated status signals, SS1 active
● r9722.0 CO/BO: SI Motion drive-integrated status signals, STO or safe pulse suppression
active
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
99