It really depends on your programming. In a case you set up the instrument first and then it repeat its measurement, at the same time you read back the data from its buffer to computer and the reading rate is a little faster than the instrument measurement rate this similar issue will appear.
If it is this case be sure the buffer has enough data before you want to read them back to PC each time/iteration.
As I remember the buffer in 34980A is in overwritten mode and may not be overflowed.
Best Regards,
Xiaoying
_____
From: Nick Payne [mailto:NickP@jaltek.com]
Sent: Monday, August 11, 2008 8:58 PM
To: PDL-LISTS,VRF (A-Lists,unix1)
Subject: [vrf] Timeout error driving 34980A
Hi,
I’m running a sequencer in a loop that is performing various measurements and switch operations but on the fifth iteration an error 811 is generated.
The functions called in the sequencer are common for each iteration so they have operated successfully for four times before the error is generated.
Is there a buffer within the instrument that has overflowed generating this error or does anyone have prior experience of this.
I have tried sending a *rst command at the start of each loop and an open all for each card and this has not worked.
Regards
Nick Payne
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If it is this case be sure the buffer has enough data before you want to read them back to PC each time/iteration.
As I remember the buffer in 34980A is in overwritten mode and may not be overflowed.
Best Regards,
Xiaoying
_____
From: Nick Payne [mailto:NickP@jaltek.com]
Sent: Monday, August 11, 2008 8:58 PM
To: PDL-LISTS,VRF (A-Lists,unix1)
Subject: [vrf] Timeout error driving 34980A
Hi,
I’m running a sequencer in a loop that is performing various measurements and switch operations but on the fifth iteration an error 811 is generated.
The functions called in the sequencer are common for each iteration so they have operated successfully for four times before the error is generated.
Is there a buffer within the instrument that has overflowed generating this error or does anyone have prior experience of this.
I have tried sending a *rst command at the start of each loop and an open all for each card and this has not worked.
Regards
Nick Payne
Disclaimer
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As Detlef writes you have to think of OPC - the 34980 will skip commands if they come too fast after each other. It is as if there is no buffer in the instrument.
BR
Steen Rudberg
_____
From: Baranski, Detlef [mailto:Detlef.Baranski@pilkington.de]
Sent: 11. august 2008 15:02
To: VRF
Subject: AW: [vrf] Timeout error driving 34980A
Does the 34980 support the opc? command ? Operation complete? That may help you in making sure that you are faster in your program than your equipment.
detlef
_____
Von: Nick Payne [mailto:NickP@jaltek.com]
Gesendet: Montag, 11. August 2008 14:58
An: VRF
Betreff: [vrf] Timeout error driving 34980A
Hi,
I’m running a sequencer in a loop that is performing various measurements and switch operations but on the fifth iteration an error 811 is generated.
The functions called in the sequencer are common for each iteration so they have operated successfully for four times before the error is generated.
Is there a buffer within the instrument that has overflowed generating this error or does anyone have prior experience of this.
I have tried sending a *rst command at the start of each loop and an open all for each card and this has not worked.
Regards
Nick Payne
Disclaimer
_____
This electronic transmission and any documents which may accompany it, contains information
from Jaltek Systems Ltd which is intended only for the use of the individual or entity to
which it is addressed, and which may contain information that is privileged, confidential,
and/or otherwise exempt from disclosure under applicable law. If the reader of this message
is not the intended recipient, any disclosure dissemination, distribution, copying or other use
of this communication or its substance is prohibited.
If you have received this communication in error, please contact the IT Administrator on the
following e-mail address administrator@jaltek.com
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