[fintelia]

Thanks for all the replies!

We have the Jaguar powered through the power distribution board, which is connected to the battery and voltage is being measured using a multimeter. The Jaguar is being controlled using the BDC-COMM software. Another Black Jaguar (from the 2013 KOP) is attached in the same configuration and works properly.

When attached to a motor instead of the multimeter setting the voltage output to 0% (or 0 Volts) results in the motor being driven at full speed. This differs from the expected result of the motor not spinning at all.

Setting the voltage (using the BDC-COMM software) to a negative value decreases the voltage read by the multimeter. For instance setting the voltage to -5V results an output of around 7V, while setting the voltage to -12V results in an output of -0.3V. Increasing the target voltage above zero has no effect, as the output voltage remains at just over 12V.

Thanks for pointing out that the proper version of the Black Jaguar firmware is 107. We will certainly upgrade at our next meeting. Nonetheless, since our other Black Jaguars running the same version of the firmware are working fine, I suspect that this is not the (only?) issue. It sure would be an easy fix if this were the problem though!