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TOPIC: Bus Voltage Fault

Bus Voltage Fault 5 years 5 months ago #853

  • junaid
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I am using SM34165D. It was running fine but suddenly its LED got Red.I have checked the status word and the following faults were there

BUS Voltage Failure
Motor is OFF

I was operating it at 28V and 3A.

Please guide me what are the possible causes of the fault and what is the remedy?
Last Edit: 5 years 5 months ago by junaid.
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Re: Bus Voltage Fault 5 years 5 months ago #858

  • csearcy
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The BUS Voltage Failure indicated that power was lost to Pins A1 and A2.
This may be caused by the wiring of the Power Supplies... and pin14 and pin15 on the 15 pin DSub connector.
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Bus Voltage Fault 1 week 4 days ago #2340

  • DaveRodda
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Overvoltage on DC bus is usually related to deceleration issues or "on the fly" starting which may be happening if you have a "blink" in the supply line.
Whatever the reason for the "blink" it may be that you need to check out settings for how a power failure/power resume is handled.
If it is trying to restart on the fly and parameters associated with that task are not set correctly, the still spinning load will generate power and dump it into the drive the drive needs to correctly determine current motor speed and adjust it's output accordingly when it does come back on line - this is what is causing the overvoltage on the bus. You get similar problem if you set deceleration time too short.
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