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<== Date ==> <== Thread ==>

Subject: RE: sscan records
From: "Mooney, Tim M." <[email protected]>
To: Christian Pauly <[email protected]>, EPICS Tech Talk <[email protected]>
Date: Wed, 2 Jul 2014 15:16:10 +0000
Hi Christian,

Here are the possible causes I can think of:

Does the scan progress even though it's not moving the positioners?  If so, the sscan record must be writing to something, because it's getting callbacks from that thing.

Are the two iocs on the same subnet?  If not, you should set the EPICS_CA_ADDR_LIST environment variable for the scanning ioc so it includes the IP address of the positioner ioc.

Are you running access control on the positioner ioc ?  If so, you should arrange for the scanning ioc to have read/write access.

Is there by chance another ioc hosting PVs with the same names as those the sscan record is writing to?  If so, the sscan record may have connected to the wrong PVs.

Can other records in the scanning ioc write to the positioners?  If so, there may have been a problem in the sscan module's build.

Has the sscan record ever successfully written to those PVs?  If so, it could be stuck waiting for a callback.  If you clear and retype the PV name that problem should go away.

If none of this helps, please send the output of
dbpr("name of sscan record","1")

Tim Mooney

________________________________________
From: [email protected] [[email protected]] on behalf of Christian Pauly [[email protected]]
Sent: Tuesday, July 01, 2014 6:56 PM
To: EPICS Tech Talk
Subject: sscan records

Dear folks,
i have two questions regarding sscan record, maybe someone can help:

1) Is there anythig wrong with running a sscan record on one ioc on one
computer, reading data values from a sensor connected to this ioc, but
using positioners controlled by a second ioc on a second pc via
channelaccess ?
Or the other way round: does the sscan recond has to run on the same ioc
as the positioner controls ?
Somehow my positioners (controlled by second ioc) dont move at all if i
start the scan. Manual control of the positioners via caput works fine.

2) I can not dont find good documentation on how to save scan data (from
a 2-dim scan) to a file. Can anyone give me a simple receipe on how to
do this ? Do i need an extra module for this ?

Thanks a lot for any help !

Chrstian


Replies:
Re: sscan records Christian Pauly
References:
sscan records Christian Pauly

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