HDC2450 - runs motor in one direction but not other

In open loop does the same thing occur? Does the feedback device show it is working with the controller?

If in open loop you have the same problem, then it sounds like something happened causing the channel to get damaged. In terms of your wiring, does it include protection from motor regen as described in both the datasheet and user manual?

Are you powered up via power supply or battery? If a power supply, is it a linear or switching supply? Switching supplies are known to give voltage spikes causing damage to the output stage.

dev.roboteq.com/dev1/index.php/docman/mo...om-regeneration/file

Was the power ever removed while the motor was in operation?

Sounds like a possible motor regen damage (back EMF). Without a real idea of what happened leading up to the failure, it is hard to say.

The only thing that is not mentioned in the datasheet or the manual is that if the precharge resistor is not present in your wiring, then the diode has to connect directly to vmot, otherwise it is completely cut off in the event the contactor switch is cut.

Was the motor in operation at time of failure? Was the battery low at any point of time?

The resistor is going to dissipate the current, but what you are trying block is the voltage spikes.

If the controller was bought in the last 90 days, it is covered under warranty. If not, then we do offer a flat rate repair fee.

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