Periodic connection loss to D-link

[Chris_Ely]

Originally Posted by JacobD

I had the same problem, just try using a fully charged battery. I'm not sure if it is a problem with the Control System or if it's a safety of some sort.

When the battery voltage drops too low, the boost power supplies for the control system can no longer supply the proper voltage. To preserve battery voltage, the RoboRIO uses a staged brownout scheme that shuts down motors and other outputs. You can learn more about this here.

As a general rule, when the battery voltage drops near or below 12V when the robot is idle, you should change the battery.

[JacobD]

Originally Posted by Chris_Ely

When the battery voltage drops too low, the boost power supplies for the control system can no longer supply the proper voltage. To preserve battery voltage, the RoboRIO uses a staged brownout scheme that shuts down motors and other outputs. You can learn more about this here.

As a general rule, when the battery voltage drops near or below 12V when the robot is idle, you should change the battery.

The funny thing is that my robot would do this at 12.5v idle. But thanks for the information. I'll look for the light indicators next time it happens. That's assuming it my robot isn't on the field during competition.

[Chris_Ely]

Originally Posted by JacobD

The funny thing is that my robot would do this at 12.5v idle

It would lose connection at 12.5V, or with a nominal battery voltage of 12.5V it would lose connection under load? If the latter, your battery might not be able to hold a charge very will anymore. Is this an old battery?

[JacobD]

Originally Posted by Chris_Ely

It would lose connection at 12.5V, or with a nominal battery voltage of 12.5V it would lose connection under load? If the latter, your battery might not be able to hold a charge very will anymore. Is this an old battery?

It has happened with 3 new batteries. So, I can say that the battery is not the problem. Don't stress over it. We can still drive for a solid 30 minutes without having any issues.

[Chris_Ely]

Originally Posted by JacobD

It has happened with 3 new batteries. So, I can say that the battery is not the problem. Don't stress over it. We can still drive for a solid 30 minutes without having any issues.

If you are driving 30 minutes on the same battery, you are most likely draining it down to the point where you can damage it. My team has lost several otherwise good batteries because of this.