[Al Skierkiewicz]

Guys,
The reason we watch for frame shorts is simply two reasons. The first involves robot collisions where parts of one robot contact electrical parts of another robot. Should this occur with a robot that has a short to chassis parts, the possibility exists for 24 volts to be applied to electronic parts that are not protected on both robots. We want all robots to have an ability to play in every match. The second involves robot operation. Should a frame short exist that ties the Crio frame/power common to the output of a speed controller, the possibility exists for some of the motor return current to flow through the Crio power lead. When this occurs, the Crio sees less than 24 volts at the input.
As sven has reported, there was a problem with the DSC power at some point and it is known that the RSL light was extinguished during the failure in the last match. Putting that altogether can point to a variety of problems, including a mating issue between the DSC and digital I/O on the Crio. There is also the possibility that something was shorting the 5 volt power supply in the DSC preventing output on all PWM and digital outputs. It would be interesting to know whether there is a powered sensor/pot or servo on the arm. If it is powered from the DSC, I would look for exposed wiring on the power leads going to this sensor. The power supplies in the DSC do have short circuit protection. In most cases, the short needs to be removed and the power must be reset for the regulator to come back on line. If you are using a simple pot, some fail with a short if they have been damaged internally.
Mr. Lim, the CIM resistance that you measure in most cases is the meter lying to you. It could be due to your own body, or the way that the meter measures when looking at high Z loads or even the humidity in the air or motor case. It is only resistance in the 10K or less range that concerns us.