Experimental Physics and
Industrial Control System

Gasper Jansa <[email protected]> · Mon, 16 Mar 2009 09:06:25 +0100

Hi

You can use extended device support to support changes to INP/OUT fields

in runtime.

See chapter 12.5 of Application developer's guide.

Regards
Gasper

Michael Abbott wrote:

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?