Functions
5.12 Safety-related applications
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
209
No. Description Status
7. Check the following points:
• No safety fault
• r9772.0 = r9772.1 = 0 (STO deselected and inactive), r9772.14 = 0
8. Check whether the motor involved is running. If yes, check the following
points:
• That the cabling between the Control Unit and Power Module is correct
• Correct assignment, drive No. - frequency inverter - Power Module - motor
• That the hardware is operating correctly
• That the shutdown paths are correctly wired
• Correct STO terminal assignment at the Control Unit
• Correct parameterization of the STO function
• Routine for the forced checking procedure of the shutdown paths
Function check, "Safe Stop 1" (SS1)
This check involves the following steps:
Table 5- 74 Function, "Safe Stop 1" (SS1)
No. Description Status
1. Initial state
• The frequency inverter signals "ready for switching on" (P0010 = 0)
• No safety faults and alarms
• r9772.0 = r9772.1 = 0 (STO deselected and inactive)
• r9772.2 = r9772.3 = 0 (SS1 deselected and inactive)
2. Switch on the motor
3. Check whether the motor involved rotates
4. Select SS1 while the ON command is being issued
5. Check the following points:
• The motor speed decelerates corresponding to the selected ramp time (if
required, use a stopwatch)
• The motor coasts down to a standstill after the parameterized minimum
speed has been fallen below
• The motor is braked and held by the mechanical brake if a brake is being
used
• No safety fault
• r9772.1 = 1 (STO active)
• r9772.2 = 1 (SS1 selected)
• r9772.14 = 1, if the monitoring function of the safety-relevant brake is
activated
6. Cancel SS1
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