Safe Torque Off (Sto); Overview - Siemens SINAMICS G120 Function Manual

Operation

6.3 Safe Torque Off (STO)

6.3 Safe Torque Off (STO)
6.3.1

Overview

What can you find in this Chapter?
The relevant operating cases for the STO function are described in this chapter.
Table 6- 1
Selecting and deselecting STO
Discrepancy in the input signal
Table 6- 2
STO is not active If STO is not active, then there are no restrictions for switching on and switching
STO is active
168
Operating cases for the STO function when the motor is switched on (ON/OFF1 = 1)
Switching the motor on and off when STO is active or not active
Switching on the motor (ON/OFF1 =
0 → 1)
off the motor.
The active STO function prevents the
motor from being switched on.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
→ Selecting and deselecting STO when the motor is switched
on (Page 169)
The safety input to select STO identifies an error.
→ Response to a discrepancy when STO is active (Page 170)
The motor is always switched off when
STO is active. The OFF1, OFF2 and
OFF3 signals have no effect.
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Switching off the motor (ON/OFF1,
OFF2 or OFF3 = 1 → 0)