Re: Is there any chance that I can change SCAN parameter dynamically?

[Luedeke Andreas <andreas.luedeke@psi.ch>]

Zhichu Chen wrote:
> [...] So it will take 40*timescale to get all I want [...]
>
> I know I can set SCAN to a very big number but, when the time scale is 
> small, I think it's not efficient then. I'm just wondering whether I 
> could use another record to control it, or something alternative.
> [...]
Hi Chen,
the choices of SCAN are rather limited.
In your case I would suggest that your calculate the desired readout 
period from the timescale and use a counter to process your readout. E.g.:

   record(calcout,"la:s") {
       field(SCAN,"1 second")
       field(INPA,"la:s.VAL")
       field(INPB,"la:t.VAL")
       field(CALC,"A+1>=B?0:A+1")
       field(OOPT,"When Zero")
       field(OUT,"la:cnt.PROC")
   }
   record(longin,"la:t") {
       field(INP,"1")
       field(EGU,"s")
   }
   record(calc,"la:cnt") {
       field(INPA,"la:cnt")
       field(CALC,"A+1")
   }

Here the record la:cnt is processed every "la:t" seconds (for "la:t">0).

Cheers
Andreas