Experimental Physics and
Industrial Control System

"Wang, Andrew via Tech-talk" <tech-talk at aps.anl.gov> · Tue, 21 Dec 2021 02:33:51 +0000

Hi Lewis,

Sorry if I wasn't clear. Basically if I run both caput commands with no wait period in between, will I expect to see 100 in A and 200 in B when I run caget.

A and B are separate records. There is no forward linking between them. They are the only records in the database file and are both passive.

-----Original Message-----
From: J. Lewis Muir <jlmuir at imca-cat.org> 
Sent: Monday, December 20, 2021 6:31 PM
To: Wang, Andrew <wang126 at llnl.gov>
Cc: EPICS tech-talk <tech-talk at aps.anl.gov>
Subject: Re: Reliability of caput

On 12/21, Wang, Andrew via Tech-talk wrote:
> Quick question.
> 
> Suppose I have two analog input records called "A" and "B" on which I would like to do caput. If I have a bash script containing the following code:
> 
> caput A 100
> caput B 200
> 
> Will that give sufficient time for caput to respond?

Respond to what?  What do you mean by "respond"?

> Or should there ideally be a "delay" between each caput. The reason why I ask is because within the sequencer, we do something similar, but with pvPut, and sometimes we see that "B" does not get updated with a new value.

How are A and B related?

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System