Missing Motor on port 1

VEX IQ General Discussion IQ Technical Discussion
1

We have been having the same problem with one of our bots that shows up everyday. The error message says; Exception Report: Missing or Invalid Motor on port 1. We have replaced the motor, we have repeatedly downloaded the Vex IQ firmware, the RobotC for Vex IQ firmware, sometimes it works and sometimes we would do it enough that eventually work, now nothing! We swapped out motor and cables but nothing works. Please help

2

So let’s narrow this down a bit:
*) are you having troubles with any motor on port 1?
*) One particular motor on any port?
*) What does “Device Info” screen say about the port to which you connect the motor?

I have had issues with firmware update mismatch bricking a motor such that it would no longer answer to any communication (so that the port appears empty), but in my case, the bootloader part of the motor firmware was still OK and I was able to revive such a motor by forcing it into the boot loader.
See Careful firmware updates - IQ Technical Discussion - VEX Forum

3

We switched motors to ports and it still says the problem is on port 1. So I conclude that it is not the motor. The device info screen says there is nothing connected to port 1, but there is

4

Hi steelr86,

We’re sorry that you have encountered this issue. Our tech support folks can help provide additional assistance to resolve this issue. VEX Tech Support can be contacted by emailing [email protected] or by calling +1-903-453-0802.

Regards,

  • Art