Safety Functions Of The Frequency Converter - Danfoss VLT MCB 150 Operating Instructions Manual

Service and Repair

7.4.3 Safety Functions of the Frequency Converter

Commissioning test report
After making e.g. LCP copy of safe parameters a commissioning test is required. Use this short version of the commissioning
test report to follow and approve the test sequence.
Safety functions
Safe Torque Off (STO)
Table 7.3 Commissioning Test Report, Safe Torque Off
MG34W302
Operating Instructions
Test procedure
1. Safe Torque Off function must be disabled
- via DI1.
- via DI2.
- Check the Safe Torque Off circuit connections against the
circuit diagram.
2. No safety faults and alarms.
3. Run the frequency converter.
4. Ensure that the correct frequency converter is running.
5. Select Safe Torque Off while the frequency converter is running.
6. Check the following
- The frequency converter coasts to zero speed.
- The motor is braked and stopped by the mechanical brake
(if available and configured).
-
Warning/Alarm 68 is displayed.
7. Deselect Safe Torque Off.
8. Check the following
- Depending on the configuration, Safety Func. Pending is
displayed.
- Safe Torque Off deselected and inactive.
9. Restart the frequency converter and check that the motor runs
normally.
10. Ensure that the Safe Torque Off function is safe and accepted to
operate.
11. Document and sign the commissioning test report.
Danfoss A/S © Rev. 2014-02-11 All rights reserved.
Approved ☑
7 7
53