Re: SNL assign to field of PV

["Madden, Timothy J. via Tech-talk" <tech-talk at aps.anl.gov>]

Thanks Mark and John!

Tim M

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From: Mark Rivers <rivers at cars.uchicago.edu>
Sent: Tuesday, April 1, 2025 5:43 PM
To: Madden, Timothy J. <tmadden at anl.gov>; tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: RE: SNL assign to field of PV

 

Hi Tim, Strictly speaking PVs don’t have fields, records have fields. PVs are basically record fields. So any place where you assign a PV to an SNL variable you can use an field name like .HIHI. Here is an example where the .PROC field

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Hi Tim,

 

Strictly speaking PVs don’t have fields, records have fields.  PVs are basically record fields.  So any place where you assign a PV to an SNL variable you can use an field name like .HIHI.

 

Here is an example where the .PROC field is used. https://github.com/epics-modules/ip/blob/1b39fea28d483e6ea008afafd96b0f471f169b42/ipApp/src/Keithley2kDMM_mf40.st#L142

 

Here is an example where the .RVAL field is used: https://github.com/epics-modules/ip/blob/1b39fea28d483e6ea008afafd96b0f471f169b42/ipApp/src/Oxford_CS800.st#L146

 

Mark

 

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Madden, Timothy J. via Tech-talk
Sent: Tuesday, April 1, 2025 5:00 PM
To: tech-talk at aps.anl.gov
Subject: SNL assign to field of PV

 

Tech Talk:

 

Is there a way to set or get specific fields of a PV from a SNL program? Example, say we want to pvPut

the HIHI field of a PV.  I see ways to get/put VAL by assign and pvGet()/pvPut(). But I don't see a way to get other fields of the PV.

 

Tim Madden

APS