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

Subject: dbGetLink question
From: Mark Rivers <rivers@cars.uchicago.edu>
To: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 1 Dec 2017 14:47:22 +0000
Folks,


I have a question about how dbGetLink works.  I have read the Application Developer's Guide (3.15.5) but it is not clear.  Specifically I want to understand how it works under the following conditions:


- Link is an output link

- Link process type is CA

- The output PV resides in another IOC.


Does dbGetLink actually read the value from the other IOC?  It seems like that would be a slow operation, and so would require the record to be asynchronous?  Or does the database put a camonitor on that external record so the link value can be obtained without an actual caget operation?  If so, I cannot find this mentioned in the Application Developer's Guide.  It only describes channel access monitors being set up for input links, not output links.


Thanks,

Mark


Replies:
Re: dbGetLink question Andrew Johnson

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