Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Tue, 18 Nov 2014 00:56:53 +0000

Hi Zen,

When you say "we can't acquire images" what do you mean?

- Does the frame counter in the main display increment?

- Have you enabled ArrayCallbacks in the main display?

- If so, then if you enable a statistics plugin is it getting callbacks?

- If so, are the statistics non-zero?

- If your problem is just not seeing images in a client like ImageJ, have you set EPICS_CA_MAX_ARRAY_BYTES correctly?

The obvious question is what might have changed a week or so ago?  Has the areaDetector software been rebuilt?  Have there been OS upgrades?

Mark

-----Original Message-----
From: Zenon Szalata [mailto:[email protected]] 
Sent: Monday, November 17, 2014 5:30 PM
To: Mark Rivers; [email protected]
Subject: Andor - Area Detector

Hi Mark,
Something inexplicable is going on with our two Andor DO420A-BN-995 
cameras.  All was working well until a week ago or so.  Since change 
took place,  The Area Detector based IOC starts up without errors, 
connects to the camera, the EDM screen shows correct values obtained 
from the camera, and we can't acquire images.  I have setup one of these 
cameras in my office, I give it an external trigger, no image, changing 
the trigger mode to internal results in the same, no image data.  We are 
using Andor SDK V2.94, Epics R3.14.12.2, asyn R4.20, ...
I have attached a console output file, which includes trace data.
I have build a few of the examples in the SDK package.  One of these is 
image test program.  It generates a reasonable image file.
We also built a copy of this IOC with Epics R3.14.12.4, asyn 4.23, CALC 
3.0, busy 1.6, sscan 2.9, mca 7.4, and area detector 1.9.1. This build 
behaves identically as the older version.
Can you suggest how to proceed understanding and fixing this problem?
Thank you in advance,
Zen

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System