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Unread 18-03-2008, 14:51
Ian G Ian G is offline
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Robot Controller Diagnostic Mode

Randomly, when we shut down the main power on our robot, the Robot Controller enters some form of diagnostic mode(the lights flash in sequence: down up blink). We asked an IFI guy about it, and he said that it normally happens if there is noise on the tether or program ports... Which we didn't have anything plugged into. It never hurt us in competitions, but it was weird. Anyone else have a similar issue?

Last edited by Ian G : 18-03-2008 at 14:52. Reason: A sentance made less sense than it does now.
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Unread 18-03-2008, 14:52
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Re: Robot Controller Diagnostic Mode

Its not a bug.. just hold the program button down, it will enter diagnostic mode
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Unread 18-03-2008, 14:55
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Re: Robot Controller Diagnostic Mode

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Originally Posted by bear24rw View Post
Its not a bug.. just hold the program button down, it will enter diagnostic mode
I understand it isn't a bug, I was just wondering why it would enter diagnostic mode on power down some of the time. Doing the same sequence of actions and then powering down would sometimes start diagnostic mode, and sometimes it wouldn't.
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Unread 18-03-2008, 15:25
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Re: Robot Controller Diagnostic Mode

Can't say I've ever heard of it happening on power down before... Strange.

Do you have an onboard program button pusher (a cable from the Digital outs to the program header)?

Maybe the output is changing state when the robot goes onto the backup battery, and thusly pushing the button
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Unread 18-03-2008, 15:34
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Re: Robot Controller Diagnostic Mode

I see that regularly under several different circumstances, I'm just in the habit of hitting reset when I see it.
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Unread 18-03-2008, 15:41
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Re: Robot Controller Diagnostic Mode

Is any metal contacting the exernal program/reset header?
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Unread 18-03-2008, 15:58
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Re: Robot Controller Diagnostic Mode

If you have an onboard backup battery charger without a series diode on its input, it's possible that the RC is getting confused by odd voltages on its main power input.
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Unread 18-03-2008, 16:10
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Re: Robot Controller Diagnostic Mode

Quote:
Originally Posted by 1075guy View Post
Do you have an onboard program button pusher (a cable from the Digital outs to the program header)?
Quote:
Originally Posted by The Lucas View Post
Is any metal contacting the exernal program/reset header?
We had nothing plugged into the header, nor was any debris in contact with it.

Quote:
Originally Posted by Alan Anderson View Post
If you have an onboard backup battery charger without a series diode on its input, it's possible that the RC is getting confused by odd voltages on its main power input.
We didn't have a backup battery charger, but perhaps the backup battery is low, or loose. I am fairly certain that it was recently charged and I tightly plugged in, but if it happens at championships, that will be the first thing I check.

Thanks for your suggestions.

Last edited by Ian G : 18-03-2008 at 16:14.
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Unread 18-03-2008, 16:14
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Re: Robot Controller Diagnostic Mode

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Originally Posted by EHaskins View Post
I see that regularly under several different circumstances, I'm just in the habit of hitting reset when I see it.
Yeah, that is our current solution too. A safety judge near the field got really mad at the drive team because they thought we didn't turn our robot off. So I would like to find something a little more preferment though,, and I have never been a fan of treating symptoms.
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Unread 18-03-2008, 16:37
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Re: Robot Controller Diagnostic Mode

Quote:
Originally Posted by Ian G View Post
A safety judge near the field got really mad at the drive team because they thought we didn't turn our robot off.
Last year, the RC was typically still running off the backup battery when our robot returned to the pit after each match. Apparently being in communication with the field electronics sets the power-down timeout to something rather longer than the normal five seconds.

I don't remember that being the case this year, but it might just have been the drive team resetting the RC to shut it off after the main breaker was opened.
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Unread 18-03-2008, 16:41
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Re: Robot Controller Diagnostic Mode

Quote:
Originally Posted by Alan Anderson View Post
Apparently being in communication with the field electronics sets the power-down timeout to something rather longer than the normal five seconds.
Four minutes, to be exact.
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Unread 18-03-2008, 18:07
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Re: Robot Controller Diagnostic Mode

That's what happens to our robot whenever we turn our robot on. It would enter "programming" mode, which inorder to stop it, we have to reset our robot. The IFI guy was really kind of stumped as to why it happened. So, no, your not the only one that of which it is happening to. Please help!
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