Yaskawa drives
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May 14, 2024 5:17 am
A "bb" alarm in a Yaskawa drive signifies a Base Block condition. This indicates that the output power to the motor has been intentionally blocked. It's not necessarily a fault, but rather a state where the drive isn't supplying power.
Here's a breakdown of the "bb" alarm and how to address it:
Cause:
Several factors can trigger a "bb" alarm:
- External Baseblock Signal: An external control system might be deliberately stopping the drive through a designated input terminal.
- Missing Minimum Input: The drive might require a specific minimum input signal (like voltage) to enable operation, and it's currently not being met.
- Drive Configuration: Certain Yaskawa drive parameters might be set to prevent operation until specific conditions are satisfied.
Troubleshooting Steps:
- Consult the Manual: The first step is to refer to the Yaskawa manual for your specific drive model. It will provide detailed information on the "bb" alarm and its potential causes.
- Review Control System Logic: If you're using an external control system, verify that it's not intentionally sending a base block signal to the drive.
- Check Input Signals: Ensure that any required minimum input signals are present and within the expected range.
- Drive Parameters: Review the Yaskawa drive parameters to confirm they're set correctly and not preventing operation due to specific conditions.