Siemens Sinamics S110 Function Manual page 355

● The input terminals can be debounced to prevent signal faults triggering other faults.
● The status of the "Safe Torque Off" function is displayed using parameters.
Enabling the "Safe Torque Off" (STO) function
The "Safe Torque Off" function is enabled via the following parameters:
● STO via onboard terminals:
● STO via PROFIsafe:
● STO via PROFIsafe and on-board terminal (F-DI 0):
Selecting/deselecting "Safe Torque Off"
The following is executed when "Safe Torque Off" is selected:
● Each monitoring channel triggers safe pulse suppression via its switch-off signal path.
● A motor holding brake is closed (if connected and configured).
If "Safe Torque Off" is deselected, this is treated as an internal safe acknowledgment. The
following processes occur:
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
Parameters p9651 and p9851 are used to set filter times.
WARNING
Appropriate measures must be taken to ensure that the motor does not move once the
motor power supply has been disconnected ("coast down") (e.g. enable the "Safe Brake
Control" function with a vertical axis).
CAUTION
If two power transistors in the power unit (one in the upper and one offset in the lower
inverter bridge) break down at the same time, this can cause a limited momentary
movement.
For rotary synchronous motors the movement can be up to a maximum of 180° /
number of pole pairs.
– p9601.0 = 1, p9801.0 = 1
– p9601.2.= 0, p9801.2.= 0
– p9601.3 = 0, p9801.3.= 0
– p9601.0 = 0, p9801.0 = 0
– p9601.2 = 0, p9801.2 = 0
– p9601.3 = 1, p9801.3 = 1
– p9601.0 = 1, p9801.0 = 1
– p9601.2 = 0, p9801.2 = 0
– p9601.3 = 1, p9801.3 = 1
Safety Integrated Functions
8.4 Safety Integrated Basic Functions
353