Siemens SINAMICS G120 Operating Instructions Manual page 395

Function test "Safe Torque Off" (STO)
This test comprises the following steps:
Table A-8
No.
1.
2.
3.
4.
5.
6.
7.
8.
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
"Safe Torque Off" function (STO)
Description
Initial state
Drive in the "ready" state (P0010 = 0)
•
No safety faults and alarms
•
r9772.0 = r9772.1 = 0 (STO de-selected and inactive)
•
P9659 = time intervals for the forced checking procedure correctly set
•
Operate the drive
Check that the expected drive operates
Select STO while issuing the command to operate
Check the following:
The drive coasts-down
•
The drive is braked by the mechanical brake and held if a brake is being
•
used
No safety faults
•
r9772.0 = r9772.1 = 1 (STO selected and active), r9772.14 = 1 if Safe
•
Brake Control is enabled
De-select STO
Check the following:
No safety faults
•
r9772.0 = r9772.1 = 0 (STO de-selected and inactive) , r9772.14 = 0
•
Check that the expected drive operates if so the following is tested:
That the wiring between the control unit and power module is correct
•
Correct assignment, drive No. – inverter power module – motor
•
That the hardware is correctly functioning
•
That the shutdown paths have been correctly wired
•
Correct assignment of the STO terminals on the control unit
•
Correct parameterization of the STO function
•
Routine for the forced checking procedure of the shutdown paths
•
Appendix
A.5 Acceptance Log
Status
A-11