Siemens SINAMICS S120 Function Manual page 75

Restart after the "Safe Torque Off" function has been selected
1. Deselect the function.
2. Set drive enables.
3. After deselecting STO, wait until the converter is "ready to switch on".
4. Cancel the "switching on inhibited" and switch the drive back on.
– 1/0 edge at input signal "ON/OFF1" (cancel "switching on inhibited")
– 0/1 edge at input signal "ON/OFF1" (switch on drive)
Status for "Safe Torque Off"
The status of the function STO is displayed via r9772, r9872, r9773, and r9774. Alternatively,
you can display the status of the function via the configurable message N01620
(configuration via p2118 and p2119).
Response time for the "Safe Torque Off" function
For the response times when the function is selected/deselected via input terminals, see the
table in Section "Response times (Page 355)".
Internal armature short-circuit with the "Safe Torque Off" function
The function "internal armature short-circuit" can be configured together with the "STO"
function.
The "STO" safety function has the higher priority when simultaneously selected. If the "STO"
function is initiated, then an activated "internal armature short-circuit" is disabled.
Function diagrams (see SINAMICS S120/S150 List Manual)
• 2810
• 2811
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p9601
• r9720
• r9722
• r9772
• r9773
• r9774
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
SI Basic Functions - STO (Safe Torque Off), SS1 (Safe Stop 1)
SI Basic Functions - STO (Safe Torque Off), safe pulse suppression
SI enable functions integrated in the drive (Control Unit)
CO/BO: SI Motion drive-integrated control signals
CO/BO: SI Motion drive-integrated status signals (Control Unit)
CO/BO: SI Status (Control Unit)
CO/BO: SI Status (Control Unit + Motor Module)
CO/BO: SI Status (group STO)
Description of Safety Integrated functions
4.1 Safety Integrated basic functions
73