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<== Date ==> <== Thread ==>
Subject: Variable SCAN Intervall and Roundoff function
From: [email protected]
To: [email protected]
Date: Tue, 16 Aug 2016 15:32:24 +0200
Hi,
i have two question für a simple controlapplication.

1.) I have a calcout-record which can increase or decrease a value
Now I am want to implement a simple variable SCAN-intervall to increase every 60 seconds or every hour . But I don't know which is the best way to do this and how to implement this in my application. There is a solution with the OROC-field but I don't know how to implement.

This is my main-calc-record:
record(calcout, "UPDOWN_" ) {
  field(CALC, "A:= ((D=0)?(A=0?0:(A-B))):((C<(A-B))?(A-B):((A+B)>C?C:(A+B)));A")
  field(INPA, "UPDOWN_.VAL PP")
  field(INPB, "SlewRate.VAL")                       
  field(INPC, "SETVOLTAGE_ PP")
  field(INPD, POWER")                    
  field(OUT, "DAC_.A PP")                          # write value out
  field(OOPT, "On Change")
  field(DOPT, "Use CALC")
  field(SCAN, ".1 second")
}

# set command.bit
record(calcout, "DAC_" ) {
  field(INPA, "UPDOWN_ NPP NMS" )
  field(CALC, "(A | 1024)")
  field(PREC, "2")
  field(OUT, "XXX PP NMS")
}

2.) I use a voltage divider with a poti in rheostat-mode (1024 steps). Because it's non-linear I have to calculate the respective bits for a value. My record works finde:

record(calc, "LINEAR_" ) {
  field(INPA, "LINEAR_ NPP NMS" )
  field(CALC, "CALCULATION")
  field(PREC, "2")
}

How can I round off the value? Let's say my calculated value is 375,6 (steps). How can I round the result off to 375 and not 376? I want to round off all result:
Example: 512,8 = 512 (noit 513)

Best regards,
Raul
Replies:
Re: Variable SCAN Intervall and Roundoff function Andrew Johnson
Re: Variable SCAN Intervall and Roundoff function Benjamin Franksen
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