Experimental Physics and
Industrial Control System

Kevin Peterson via Tech-talk <tech-talk at aps.anl.gov> · Thu, 9 Jun 2022 12:21:07 -0500

I modified my python script to toggle the ao values between -0.5 and 5

and the A32 address is always -0.5:

VME Bus Error accessing A32: 0xbfe00000
machine check
Exception next instruction address: 0x032dc280
Machine Status Register: 0x0008b032
Condition Register: 0x40000844
Task: 0x3576c20 "CAC-event"

0x3576c20 (CAC-event): task 0x3576c20 has had a failure and has been

stopped.

0x3576c20 (CAC-event): The task has been terminated because it triggered

an exception that raised the signal 10.

I can't run the Wind River workbench yet; I'm still waiting on IT to

start the necessary license servers.

My VME has the VMETRO bus analyzer in it, but it has probably been a

decade since I watched someone (Ron Sluiter) use it effectively.

Kevin

On 6/9/22 11:05, Mark Rivers via Tech-talk wrote:

If the test program loops from -0.7 to -0.5 the VME bus error address is

0xbfe66664.  That is -0.6999988555908203 when interpreted as a double

with that address as the most significant 32 bits.  That is within the

now more restricted range of the output values.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System