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

Subject: Native NI LabVIEW/EPICS integration
From: Luca Cavalli <[email protected]>
To: "[email protected]" <[email protected]>
Date: Thu, 10 Nov 2016 14:38:20 +0000
Dear all,

I have to control a NI PXI device.
The software is written in LabVIEW using native NI LabVIEW/EPICS
interface,unfortunately it seems to only support a subset of PV properties (no
EGU, limits etc.).

My idea is to write a tiny IOC that maps the "raw" LabView variable (e.g.
PV_NAME_RAW) to a complete EPICS PV (e.g. PV_NAME) with precision, EGU, alarms
and limits.

[My IOC] <--PV_NAME--> [LV Mapper IOC] <--PV_NAME_RAW--> [NI PXI]

The problem is that my PV must be both readable and writable at the same time.
I.e. when I write the PV_NAME variable I want also the PV_NAME_RAW variable to
be updated, and when LabVIEW modifies PV_NAME_RAW value I want PV_NAME to
reflect the change.
How can I define my db in LV Mapper IOC? I'm a bit lost, shall I use an input
record or output record?

So far I only achieved single direction control (either input or output, not
both at the same time).

Thanks for your help.

Luca


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Replies:
RE: Native NI LabVIEW/EPICS integration Mark Rivers

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