Siemens SINAMICS G120 Operating Instructions Manual page 319

Procedure
To perform an acceptance test of the STO function as part of the basic functions, proceed as
follows:
1.
2.
3.
4.
You have performed the acceptance test of the STO function.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
The inverter is ready
The inverter signals neither faults nor alarms of the safety functions (r0945[0...7],
•
r2122[0...7]).
STO is not active (r9773.1 = 0).
•
Switch on motor
2.1. Enter a speed setpoint ≠ 0.
2.2. Switch on the motor (ON command).
2.3. Check that the correct motor is running.
Select STO
3.1. Select STO while the motor is running
Test each configured activation, e.g. via digital inputs and PROFIsafe.
3.2. Check the following:
When controlled by PROFIsafe
The inverter signals the
•
following:
"STO selection via PROFIsafe"
(r9772.20 = 1)
If a mechanical brake is not available, the motor coasts down.
•
A mechanical brake brakes the motor and holds it to ensure that it remains
at a standstill.
The inverter signals neither faults nor alarms of the safety functions
•
(r0945[0...7], r2122[0...7]).
The inverter signals the following:
•
"STO is selected" (r9773.0 = 1).
"STO is active" (r9773.1 = 1).
Deselect STO
4.1. Deselect STO.
4.2. Check the following:
STO is not active (r9773.1 = 0).
•
The inverter signals neither faults nor alarms of the safety functions
•
(r0945[0...7], r2122[0...7]).
8.8 Safe Torque Off (STO) safety function
For control via terminal
The inverter signals the following:
•
"STO Selection via terminal"
(r9772.17 = 1)
Setting functions
Status
319