EPICS Re: DRVL, DRVH, HOPR, LOPR

Experimental Physics and Industrial Control System

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

Subject:	Re: DRVL, DRVH, HOPR, LOPR
From:	"Kasemir, Kay" <[email protected]>
To:	"[email protected]" <[email protected]>
Date:	Wed, 1 Feb 2012 08:43:34 -0500

Hi:

On 2/1/12 08:25 , "Abadie Lana" <[email protected]> wrote:
>Questions: 
>1. how does one (especially the client) know that the limits are really
>set? And not default values.
>2. if it performs a check that HOPR!=LOPR then what if one defines an
>upper limit (but does not need a low one) and vice-versa.
There might not be a way to find out.

For alarm limits, you get NaN for those that are not defined.
In a future release of EPICS, that might be a way to communicate
undefined control ranges. At the same time, that might break
many existing clients.

-Kay

References:: DRVL, DRVH, HOPR, LOPR Abadie Lana

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