We want to put 3 gyros on this years robot, but the Gyro Open VI only says we can use 2. Is there a rule that we cant, or the code cant handle it or, is it just being weird.
There are only two hardware accumulators that perform the integration of the gyro rate to give position built into the fpga. If you want to just get the rate from the gyros, you can use analog vi. If you want angle from more then two gyros, you can write your own integration.
What do you want 3 gyros for?
If we added a second analog module in our crio would that enable us to use more then 2 gyros?
Unfortunately, no. The accumulators are only active on the first analog module.