Experimental Physics and
Industrial Control System

Michael Abbott <[email protected]> · Mon, 16 Mar 2009 06:48:01 +0000 (GMT)

On Mon, 16 Mar 2009, ÍôÆôÊ¤ wrote:
> I am using the hytec8401 and the correponding hy8401ip driver from 
> Diamond. The record can be follows:
> 
> record(ai,"AI")
> { 
>  field(DTYP,"Hy8401ip")
>  field(INP,"#20S0 @ MEAN=10)
> }
> 
> Sometimes i want to change the samples to average. But i do not know how 
> to change this field without reboot the ioc? AI.INP looks like can not 
> be change in running. By the way i use edm.

I'm afraid you're right.  There is no hook from record support to let the 
driver know that the INP field has changed, so it's only parsed during 
record initialisation.  It's not very clear to me how to fix this.

To the list in general:
    Is it possible for driver initialisation code to add callback requests 
for extra PVs, or is there some other way to discover when a field not 
directly supported by record support has changed?

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System