Products > Test Equipment

Rigol DP832 - Firmware list and bugs

<< < (97/153) > >>

bson:
It's probably your level shifter ending up powering the 3.3V from the 5V.  Try unplugging the 3.3V supply wire from the PSU and see what happens.

firstcolle:
yep....
if i unplug the 3.3v all works the same way... if i take off the level shifter the PSU works as i expected..

thanks!!

McBryce:
Then you've somehow set your level shifters up the wrong way, they shouldn't be able to power the entire 3.3V circuitry, just shift the levels of the data signals.

Bryce.

firstcolle:
yes.. it's one cheap level shifter from ebay with an LDO on board. take it out and now all works as i expected..

many thanks

eelliott:

--- Quote from: vertual on December 16, 2016, 06:23:02 pm ---Same problem, when device controlled by matlab trough ethernet DP832A time to time self reboot. Fixed IP.
I have one 3 years ago, with firmware 1.09.00.01 it happens maybe one time per months.
Second tool new one with latest firmware, self reboot almost 1 time per 1-2 day.
My software just in the cycle one time per second fetch current and voltage from CH1 and CH2.

Even it one time happens on my eyes, CH1 and CH2 self OFF, over 0.5 seconds disappear image on the display, over 2-3 seconds tool again ready to work. But connection with computer terminated, program stopped, output is OFF. 1-2 days of work lost.
after self reboot possible immediately restart program and enable output, but need close port and open again.

Maybe somebody know how fix it, or how to see error log from device?

--- End quote ---

I've never experienced the issue with the Ethernet connection dropping but I haven't performed long-running tests.  My DP832 was purchased July 2014 and is presently 00.01.14.

However, regarding you question about retrieving the error log, you could try the :SYST:ERR? command.  To retrieve all errors you keep issuing the command until the DP8xx returns 0,"No error".

However, I'm not optimistic that you'll see a meaningful error message.  I connected to my DP832  concurrently over both Ethernet and USB.  I unplugged the Ethernet connection then used the USB connection to issue the :SYST:ERR? query and received 0,"No error" as the response.  In the case of hardware or firmware malfunction (as opposed to unplugging the Ethernet cable) or if there is some mystery event that no one has recognized yet you might get lucky and get a meaningful message.  (Connecting concurrently over both Ethernet and USB was simply a matter of using NI Max to open two concurrent Open VISA Test Panel sessions, one for Ethernet and one for USB.  Keysight's Connection Expert won't work easily for this purpose; it insisted on communicating via Ethernet even though it detected the USB connection. )

Another thought: is there any correlation between the Ethernet dropping and the DP8xx switching between CV and CC mode?  For example, was the display consistently showing CV throughout the test but when the Ethernet drops the display now shows CC?  (The CV vs CC status can also be determined and logged programmatically (:OUTP:CVCC? command), but if its changing state is the cause of the Ethernet problem then the query probably should be done over USB.)  My general thought here is there might be some event which is causing the problem;  CV vs CC is just one candidate.

Another thought is to use Wireshark to detect whether there are spurious commands or requests being sent to the DP8xx.  I'm not optimistic about this being a fruitful effort.

Edit 20170124: There are two ways to determine CV vs CC status of a channel.  My original post mentioned the Questionable Status Register (actually it's the Questionable Status Summary Register) but the easier way is the :OUTP:CVCC? command.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod