Safe Torque Off (Sto) For Sinamics Hla - Siemens SINAMICS S120 Function Manual

Description of Safety Integrated functions
4.1 Safety Integrated basic functions
4.1.1.1

Safe Torque Off (STO) for SINAMICS HLA

For the HLA module, safe torque off (STO) corresponds to shutting off a safety-relevant
shutoff valve.
Special features of STO for HLA
● The shutoff valve controls the infeed to the hydraulic circuit. The shutoff valve is
controlled via an F-DO of SINAMICS HLA.
● For Safety Integrated Functions, it is absolutely necessary that a shutoff valve is
connected with the associated feedback signals.
● You configure the feedback signal contacts of the shutoff valve using parameter p9626.
● You can take into account the response times of the feedback signals using parameter
p9625.
● The shutoff valve is safely closed by selecting STO. If the shutoff valve signals a safe
state via the feedback signal(s), the "STO active/Power removed" state is displayed, and
is output at the configured safety-related output (PROFIsafe feedback signal telegram, F-
DO on TM54F).
Figure 4-1
● F-DO is dynamized each time that STO is selected/deselected: "Diag DO+" and "Diag
DO-" are checked when switching F-DO+ and F-DO-.
● This makes it unnecessary to select forced checking procedure (test stop) explicitly.
● If an error occurs in the forced checking procedure (test stop), the converter will issue
fault F01632 or F30632.
74
Interconnecting the shutoff valve (for an axis)
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated