Chief Delphi - Relay Signal not working

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Relay Signal not working

We are having problems with our relays. We used to having our relays working, but they have all suddenly stopped working, on both different robots.

The spike is getting power, as there is the LED indicator is orange. The brand new VEX Pro spike is connected to our compressor, with the PWM Cable running to Relay 3 on the digital sidecar. We have the ribbon cable running form the digital sidecar to the module in slot 2 on the cRio, with the terminal screws in. The code on for the spike is as follows. The code below is only for the spike and the joystick.

Code:

class RobotDemo : public IterativeRobot

{

Relay *manualCompressor;

Joystick *primaryController; 

public: 

RobotDemo(){

manualCompressor = new Relay(3);

primaryController = new Joystick(1);

}

void RobotDemo::TeleOpPeriodic(){ 

if(primaryController->GetRawButton(6)){ 

manualCompressor->Set(Relay::kForward);

}

else if(primaryController->GetRawButton(5)){ 

manualCompressor->Set(Relay::kReverse);

}

else{ 

manualCompressor->Set(Relay::kOff);

}

}

Every subsystem that runs off of a victor on our robot (i.e. our drivetrain) work just fine. I even put an indication on the Smart Dashboard that told me when the button assigned to the spike was pressed. I put that code inside the if statement for the spike, so I know that the if statement is executing.

We have no idea what is wrong with our relays, and would really appreciate some help and ideas.

Thanks,

Re: Relay Signal not working

Is some other part of your code trying to control Relay 3 at the same time?

Re: Relay Signal not working

I'd say that it's probably some slip of the mind of your electrical guy (I have many.) Just make sure that 1. Your cable is connected to relay three counting up from 1 (parallax makes it hard to be sure) 2. Your signal is in the correct direction (check with a voltmeter) 3. Your cable has continuity for each of the respective pins (check with an ohmmeter or with a known good PWM cable) 4. Your cable is wired correctly, make sure the connector isn't flipped (simple mistake but easy fix.)
Good luck

Re: Relay Signal not working

Quote:

Is some other part of your code trying to control Relay 3 at the same time?

No, nothing else on our robot is trying to control relay 3 at the same time.

Quote:

Everything you have mentioned has already been tested. We've tried adjusting pretty much everything electrically.

Re: Relay Signal not working

What lights are lit on the Digital Sidecar when you're trying to set the relay Forward? When you're trying to set the relay Reverse?

What is the big orange Robot Signal Light doing throughout the process?