Experimental Physics and Industrial Control System
Subject: |
Granville-Phillips VG-307 vs GPIB |
From: |
[email protected] (Bill Brown) |
Date: |
Wed, 3 Aug 94 13:50:36 PDT |
Is there anyone on the list(s) who has any experience using the VG_307 with
the GPIB interface? I've been going 'round and 'round with these things for
several days.
They seems that the initially work ok but after a while
(a-few-minutes <= a-while <= a_few_hours)
they stop responding.
Cycling power on the controller brings it "back-to-life." Re-booting the
processor usually brings it "back-to-life."
We're using the N.I. GPIB-1014 vme interface, and the normal EPICS driver
& device support. We're looking at 3 parameters in each controller and are
doing record-processing every 5 seconds. There is only one vacuum gauge in
each unit, and I'm only trying to talk to one gauge at each address.
In my test setup there are no ion-gauges attached, but that doesn't seem to matter.
I've tried a lot of things - long GPIB cables, short GPIB cables, one instrument
on a "chain", two instruments on a "chain", different instruments, different
'1014, different processors, different vme bins, etc. with essentially the same
results. Eventually the instrument seems to drop into "sulk mode" and I start
seeing nothing but timeouts.
I'd be most grateful for any hints or bits (bytes? shorts? longs?) of wisdom.
Disclaimer: Any opinions are my own and have |
nothing to do with the official policy or the | -bill
management of L.B.L, who probably couldn't | [email protected]
care less about employees who play with trains. |
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