Siemens SINAMICS G120 Operating Instructions Manual page 212

Functions
5.12 Safety functions
Function check, "Safely Limited Speed" (SLS)
This check involves the following steps:
Table 5- 99
No.
1.
2.
3.
4.
5.
6.
7.
8.
212
Function, "Safely Limited Speed" (SLS)
Description
Initial state
The inverter signals "ready for switching on" (P0010 = 0)
•
No safety faults and alarms
•
r9772.4 = r9772.5 = 0 (SLS deselected and inactive)
•
Switch on the motor. The motor speed must be higher than the parameterized
safely limited speed, if the machine permits this
Check whether the motor involved rotates
Select SLS while the ON command is being issued
Check the following points:
r9772.4 = 1 (SLS selected)
•
The motor response depends on the selected mode of the SLS function
•
– SLS mode 0
The drive speed decreases corresponding to the selected ramp time
and then the inverter is subsequently passivated
– SLS mode 1
The motor speed decelerates corresponding to the selected ramp
time. The motor then rotates with the parameterized safely limited
speed
– SLS mode 2
The inverter is immediately passivated, the motor coasts down
– SLS mode 3
The inverter is immediately passivated, the motor coasts down
r9772.5 = 1 (SLS active)
•
Deselect SLS
Check the following points:
No safety fault
•
r9772.4 = r9772.5 = 0 (SLS deselected and inactive)
•
Check whether the drive involved is running. If yes, check the following
points:
The cabling between the Control Unit and Power Module is correct
•
Correct assignment, drive No. - inverter - Power Module - motor
•
The hardware can function correctly
•
Correct wiring of the shutdown paths
•
Correct parameterization of the SLS function
•
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
Status