Operating instructions

Functions
5.12 Safety functions
CU240S and CU240E Control Units, FW 3.2
212 Operating Instructions, 03/2009, A5E02440075B AA
Function check, "Safely Limited Speed" (SLS)
This check involves the following steps:
Table 5- 99 Function, "Safely Limited Speed" (SLS)
No. Description Status
1. 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)
2. Switch on the motor. The motor speed must be higher than the parameterized
safely limited speed, if the machine permits this
3. Check whether the motor involved rotates
4. Select SLS while the ON command is being issued
5. 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)
6. Deselect SLS
7. Check the following points:
• No safety fault
• r9772.4 = r9772.5 = 0 (SLS deselected and inactive)
8. 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