Magnetek IMPULSE VG+ Series 3, Инструкция по эксплуатации, Страница: 164 / 183

IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
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3. If the encoder appears to have no mechanical problems, the encoder cable should be checked for
damage and replaced if a problem is found.
4.1 Each of the encoder wires should be checked for continuity.
4.2 The wires should be checked for shorts between any two wires.
4.3 The wires should be checked for shorts to the shield or ground.
4.4 Visually inspect the cable for damage that may be causing intermittent problems.
4. If none of the above steps has identified a valid problem(s), only then should the BE3 detection
parameters be adjusted.
NOTE: It is desirable to have as fast a fault reaction time as possible without causing
nuisance trips.
5. Ensure that C8-04 is equal to the brake’s mechanical delay time.
6. Increase the value of C8-06 to no more than 1 second.
7. Decrease the value of C8-07 to no less than 10.
Fault Code: BE6–Brake Proving Alarm
Definition
The BE6 alarm indicates that the drive has commanded the brake to set but it has detected more than
the expected encoder feedback. A BE6 alarm will occur if the number of pulses received during the
BE6 detection time (C8-12) is greater than the expected number of pulses (C8-13).
NOTE: This fault typically indicates a failed brake. Power should NOT be removed while this
fault is active and the load should be moved to a safe location and lowered before
proceeding with any corrective action.
Corrective Action
1. Check the brake for proper operation and adjustment. If the brake does not set, is improperly
adjusted or is excessively worn, it may not be able to hold the load. This will allow the encoder
pulses received during the detection time to exceed the set point.
2. Check the encoder cable for damage and proper grounding. Replace it if a problem is found.
3.1 Each of the encoder signals should be checked for excessive noise.
3.2 The shielded encoder cable should be properly grounded.
3.3 Visually inspect the cable for damage that may be causing intermittent problems.
3. Check the alignment of the encoder pulse wheel with the sensor head, or the encoder shaft
coupling (Depending on the type of encoder used). If the pulse wheel is misaligned or the shaft
coupling is loose the drive may get erratic pulse signals possibly causing a BE6 fault. Repairs to
the encoder wheel or shaft coupling should be made immediately before again attempting to
operate the hoist.
4. If none of the above steps has identified a valid problem(s), only then should the BE6 detection
parameters be adjusted.
NOTE: It is desirable to have as fast a fault reaction time as possible without causing
nuisance trips.
5. Ensure that C8-11 is equal to the brake’s mechanical delay time.