Functions
5.12 Safety-related applications
Frequency inverter
208 Operating Instructions, 08.10. 2008, t.b.d.
5.12.5.2 Function check of the acceptance test
Description
The function check must be carried out for each individual drive
(under the assumption that the machine permits this).
Conducting the test
First commissioning
Standard commissioning
Please enter a
check mark
Function check, "Safe Torque Off" (STO)
This check involves the following steps:
Table 5- 73 Function, "Safe Torque Off" (STO)
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)
• P9659 = time intervals for the forced checking procedure correctly set
2. Switch on the motor
3. Check whether the motor involved rotates
4. Select STO while the ON command is being issued
5. Check the following points:
• The motor coasts down to a standstill
• The motor is braked and held by the mechanical brake if a brake is being
used
• No safety fault
• r9772.0 = r9772.1 = 1 (STO selected and active), r9772.14 = 1, if safe
brake control is active
6. Deselect STO
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