Handling the BE2 Alarm Code in an IMPULSE Series 5 VG+ Drive
Definitions
BE2 Alarm Code: An alarm code that indicates the drive is not developing motor torque to the value of C-860.
Auto Tune: A process that ensures the drive and motor are properly synchronized.
Holding Break: A device that holds the load when the drive is not in operation.
Motor Torque: The amount of torque that the motor develops.
1. Introduction
This SOP provides a step-by-step guide to handle the BE2 alarm code in the VG+ series 5 drive.
2. Procedure
2.1 Auto Tune
Ensure that the drive and motor have had a successful auto tune performed prior to troubleshooting the BE2 alarm. If not, perform an auto tune before proceeding with any other settings or operations of the VG+ Series 5 drive and motor.
2.2 Check Holding Brake
Inspect the holding brake or brakes on the hoist. If the brakes are not set or are worn to the point where the motor cannot be energized against the brake to achieve the brake release torque of C08-16 within the time window of C08-02, the drive will trip on a BE2 alarm.
2.3 Check Motor Connection
Ensure that the motor is directly connected to the drive. If T1, T2, T3 are not connected at all, there will be no current flow, the drive won’t register motor torque, and a BE2 alarm will be triggered.
2.4 Check for Previous Faults
If the drive has previously tripped out on the fault code LF output phase loss and that fault has been reset, a run command following the resetting of that fault will cause the drive to trip out on a BE2 alarm. This is because the drive is not able to deliver full motor torque within the one-second time period due to the lost phase.
2.5 Monitor Mode Parameters
Use the menu key to look at the monitor mode parameters, standard monitors, and motor torque. This can be done using the monitor mode displays while the drive is running. The key parameter to look at is U01-09, which is the motor torque.
2.6 BE2 Alarm
The BE2 alarm is based on the settings in the C08 parameters. The drive compares the amount of motor torque it expects to see during the time of C08-02 (IFB OK time) with the motor torque loaded into C08-16 (initial forward torque). If the VG+ Series 5 drive doesn’t see C08-16 motor torque, within the time window of C08-02, it will trip out on a BE2 alarm.
2.7 Resetting the Drive
The drive will automatically reset when the run command is released, after tripping on a BE2 alarm three times. After the fourth BE2 alarm, within a ten minute time period, the drive will discontinue operation, and will require a hard reset.
3. Conclusion
This SOP provides the basic information on the description of, programming and troubleshooting the BE2 alarm code. Always ensure a successful auto tune has been completed before examining causes of the BE2 alarm. Most often, a BE2 alarm indicates that the holding brake is not holding or the motor is not fully connected to the drive.
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15 сен 2024
