CapinWinky
Member
I have a hanging load on a Kinetix 5500 and we are experiencing crashes if we lose 3-phase power during operation. The 24VDC power is still live, so the PLC and safety circuit are still up when this happens. Our Bus voltage is normally 680VDC from our 480VAC input.
The drive is recognizing the drop in DC Bus voltage and produces a message that it is lowering the torque limit. That is insane to me; why would it take it upon itself to lower my torque instead of just faulting out. The "Action to take upon exception condition" for Bus Undervoltage Factory and User limits is "StopDrive". I don't see any UnderVoltage Limit parameter anywhere in the Axis parameters, so I don't know what those limits are.
I need this thing to turn on the brakes if it loses 3-phase, not go limp-wristed and crash my ****. What's the best way to go about this in a bulletproof way? Do I need to monitor the voltage myself with a GSV and throw a MAF or is there some setting I'm not seeing that will make the drive do this on its own?
EDIT: The reason this thing regularly loses 3-phase power is out of my control and customer required. It is just a thing I have to expect to occur regularly and deal with.
The drive is recognizing the drop in DC Bus voltage and produces a message that it is lowering the torque limit. That is insane to me; why would it take it upon itself to lower my torque instead of just faulting out. The "Action to take upon exception condition" for Bus Undervoltage Factory and User limits is "StopDrive". I don't see any UnderVoltage Limit parameter anywhere in the Axis parameters, so I don't know what those limits are.
I need this thing to turn on the brakes if it loses 3-phase, not go limp-wristed and crash my ****. What's the best way to go about this in a bulletproof way? Do I need to monitor the voltage myself with a GSV and throw a MAF or is there some setting I'm not seeing that will make the drive do this on its own?
EDIT: The reason this thing regularly loses 3-phase power is out of my control and customer required. It is just a thing I have to expect to occur regularly and deal with.
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