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#16
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Re: Losing power through DS.
No RSL blnk and half the PWMS are out? What are you using to connect the DSC to your cRIO? If you're using a ribbon cable, that sounds like about half the ribbon cable isn't crimped properly. Try a different, known good ribbon cable and/or check your current ribbon for continuity. A good ribbon cable should have continuity pin-for-pin from the male to the female side.
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#17
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Re: Losing power through DS.
We do have all three signal lights, Bat, 5V, 6V, and we are using the flat cable. We DO have the rounded cable and at today's meeting I plan on switching the flat cable to the rounded variant.
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#18
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Re: Losing power through DS.
If I recall correctly, there were different weird issues with some of the round cables. I believe they centered around using the accelerometer with I2C, so that may not be a concern for you.
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#19
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Re: Losing power through DS.
I heard that also, and I don't think we'll be using an accelerometer. However, a gyro, is still up in the air. We replaced the flat cable with the round cable, and used a brand new DS. All lights were good, and the RSL flashed/stayed constant when it was supposed to. We have yet to test the PWM channels, but I have high hopes that they will work.
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#20
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Re: Losing power through DS.
Quote:
This happened to us when the cable wasn't fully seated. One end was up only about a sixteenth of an inch, not really enough to see easily, but some PWMs stopped working. I worked with another team who had a nick in their ribbon cable and the connection would cut out randomly. That one might sneek by a continuity check so do a visual inspection under a magnifier if you have one. Look for sharp creases as well as breaks in the insulation. Good luck! |
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#21
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Re: Losing power through DS.
You may think you wired it into the 12v terminal, but if you passed inspection, it most certainly was not. That is a very specific thing that is checked for during the power-up phase of inspection. It also is very likely to be noticed by the field personnel if not working properly.
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#22
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Re: Losing power through DS.
In rare cases I have seen a DSC with all three lights on but dim. There was no connection to 12 volts on the PD. All three lights have to be on and bright.
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#23
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Re: Losing power through DS.
Quote:
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