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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: LabView-EPICS Integration using SoftIoc |
| From: | "Arnold, Ned D. via Tech-talk" <tech-talk at aps.anl.gov> |
| To: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, "Mostafa, Jalal (IPE)" <jalal.mostafa at kit.edu> |
| Date: | Mon, 2 Nov 2020 14:27:31 +0000 |
|
Another issue to consider is the timestamps applied to the EPICS records ...
Ned
From: Tech-talk on behalf of Mostafa, Jalal (IPE) via Tech-talk Sent: Monday, November 2, 2020 07:44 AM To: tech-talk at aps.anl.gov Subject: LabView-EPICS Integration using SoftIoc Hi all!
We have many systems from NI that we would like to integrate with EPICS for the KATRIN experiment (katrin.kit.edu) The old control system was written in LabView but we would like to replace it with EPICS without rewriting the code again. Therefore, we are looking for a nice LabView-EPICS integration. We have seen two options for LabView: - CALAB which does not work with realtime devices - Official NI EPICS module. It is good but I can list several problems: huge loss of EPICS features (it is only an implementation of CA plus alarming, the other metadata and configuration fields are not available) - not very developer-friendly (adding/removing PVs relies on shared variables so it is time consuming) Another two solutions we thought of: 1. Using AsynDriver and communicate with the realtime device using a TCP protocol 2. Running an EPICS server on the realtime device using NI EPICS module then shadowing it with a SoftIoc using CA links. (a softIoc server running with input and output records to read and write to the original LabView EPICS server) I have several concerns here: - Am I missing any other way to integrate LabView with EPICS? I would like to hear from your experiences. - Although solution (1) is time consuming, I am in favor of it but let's check if we can do it more easily with solution (2). Anyway, can the experts comment on its feasibility? - Solution (2): What do you think about performance? Alarms? I/O Intr are not available on a softIoc, so the developer has to use periodic SCAN. How can I add custom SCAN periods? Thanks for your help. Best, Jalal |