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eez-open / modular-psu-firmware

Firmware for EEZ Bench Box 3 (BB3)
https://www.envox.eu/eez-bb3/
GNU General Public License v3.0
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DCP405: triggers unwanted Standby #298

Open fusedFET opened 2 years ago

fusedFET commented 2 years ago

When disabling a channel, the BB3 sometimes goes into standby. Firmware: 1.7.3 HW: DCP405 R2B11

There is a large part of random to reproduce it, but I now have encountered it multiple times.

https://user-images.githubusercontent.com/8060929/144853461-93c4f194-fdb3-40eb-8456-0bc901d8086f.mp4

prasimix commented 2 years ago

Please let us know if anything is recorded in to event log (use icon in left down corner).

fusedFET commented 2 years ago

Here is the event log when having the issue: image

Also, this might be related or interesting: image

prasimix commented 2 years ago

Ok, so you probably have this option enabled: image

fusedFET commented 2 years ago

Correct, I have this setting enabled. Disabling the setting does no longer put the system in standby. It does now write a "Channel is tripped!" message.

prasimix commented 2 years ago

That's fine, that is the trip which bring them into standby mode due to that option activated. So it seems that some overshoot is present on the output enabled. Is it possible that you have load connected with longer cables on that channel?

fusedFET commented 2 years ago

I do have some longer cables, about 40 cm. Maybe in order to clarify the issue, it would be practical to have a message on screen when going into standby for this reason: "OVP Triggered Standby..." ?

prasimix commented 2 years ago

I do have some longer cables, about 40 cm. Maybe in order to clarify the issue, it would be practical to have a message on screen when going into standby for this reason: "OVP Triggered Standby..." ?

Yes, that makes sense, otherwise it can look confusing (and scary) if the user forgets that he chose the option to go to standby because of the trip.