Experimental Physics and Industrial Control System
On Mon, Nov 20 2017, Wang Xiaoqiang <[email protected]> wrote:
> The UDF (UnDeFined) alarm and INVALID severity is to indicate the values
> are default values, have not got updated by the driver. This is the same
> behavior as the EPICS database gets initialized on start-up.
>
> Calling setParamStatus to clear the alarm status is all correct. It is
> then necessary to call driver.updatePVs() to inform ca clients with a
> DBE_ALARM event update. Otherwise this update event will be delayed
> until the next driver.updatePVs() call. And in PCASpy 0.6+, every caput
> triggers a call to driver.updatePVs(). That explains seeing all four
> updates together, in which channel A gives a value update and B,C,D give
> an alarm update.
>
> To conclude, it is an incompatible change introduced in PCASpy 0.6. I
> created an issue to track this.
> https://github.com/paulscherrerinstitute/pcaspy/issues/48
>
> In any case, it is best to explicitly call driver.updatePVs() after
> calling setParam, setParamStatus, setParamEnums, setParamInfo. I will
> add this the docs.
Thanks, Xiaoqiang. This is all very useful info, and adding it to the
documentation would be great. I'll add updatePVs() to my code where
needed.
jamie.
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- issue with either camonitor or pcaspy in 3.15? Jameson Graef Rollins
- Re: issue with either camonitor or pcaspy in 3.15? Wang Xiaoqiang
- Re: issue with either camonitor or pcaspy in 3.15? Jameson Graef Rollins
- Re: issue with either camonitor or pcaspy in 3.15? Wang Xiaoqiang
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