Electronics Forum | Thu Sep 26 13:55:54 EDT 2019 | ttheis
One of our GSM1 machines occasionally stops running in the middle of a program and I haven't been able to figure out what is causing it. When the issue occurs, the "BM" (bus master) light on the SYS68K card drops out (turns off, no activity) the boa
Electronics Forum | Fri May 06 17:03:03 EDT 2016 | ttheis
A similar issue happened with our second machine the other day. I noticed on both machines that the "BM" light on the sys68k cpu force board goes out when this happens. Does anyone have any insight on what this means?
Electronics Forum | Fri May 06 20:22:02 EDT 2016 | ttheis
I found this in the Force SYS68K CPU-30 manual: ------------ "BM" LED If the CPU board is the current VMEbus master, the green BM LED is lit. This provides the user with a convenient visual indication of the status of the VMEbus. ------------ So th
Electronics Forum | Fri Oct 11 09:49:07 EDT 2019 | ttheis
FYI I did try logicomm but the log files were empty. There must be something wrong with my connections from the force board to the EPC. I'll keep investigating. I also swapped the EPC to see if that makes any difference.
Electronics Forum | Tue Dec 22 15:10:57 EST 2020 | ilavu
Tom, There are two power supply in the machine. One on top of VME box and other behind power distribution panel. The voltage that you see and check at PDP is not from VME.
Electronics Forum | Wed Dec 23 00:06:15 EST 2020 | ttheis
I believe I found the power supply you refer to on the back side of the pdp mounting panel. I will have a look at it.
Electronics Forum | Wed Dec 23 12:53:59 EST 2020 | ttheis
Thanks for the detailed information. I have a spare dc/dc converter on order to try swapping them. Another note is all dc power is cut out by the pdp.ps1, not just 12vdc. 24vac power remains.
Electronics Forum | Wed Dec 23 19:50:28 EST 2020 | ttheis
Thanks; I have a spare power supply coming as well. I will start by swapping dc-dc converters first and if the problem persists swap the pdp power supply. I'll report back what I find.
Electronics Forum | Wed Apr 20 13:13:20 EDT 2016 | ttheis
Hi Guys, Yesterday one of our two gsm1 machines just stopped moving and let down the board mid-production. The epc computer continued to respond but no messages were displayed when palming up or down. I tried local IO and it said no IO was configure
Electronics Forum | Tue Dec 22 00:11:41 EST 2020 | ttheis
Well it seems you are onto something with the vme power supply. The issue has resurfaced and I did notice the LED's on the keyboard went out when the issue occurs. I looked at the power distribution board to the left of the vme and it shows the +12V
