Experimental Physics and Industrial Control System
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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
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- Replies:
- Re: Variable SCAN Intervall and Roundoff function Andrew Johnson
- Re: Variable SCAN Intervall and Roundoff function Benjamin Franksen
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ANJ, 16 Aug 2016 |
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