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General => Technical support => Topic started by: kenobe on September 16, 2008, 07:00:26 AM

Title: user defined function
Post by: kenobe on September 16, 2008, 07:00:26 AM

Hello
may I know how to do the following in one user defined function
a) read analog input 1 and store in variable A
b) add 2.5 to variable A
c)  if a>5 then turn on output 1, else turn off output2

thanks

Title: Re:user defined function
Post by: support on September 16, 2008, 09:17:25 PM

Since T100MD does not support floating point, assuming you don't use more than 1 decimal place, then use a fixed point of 1 = 0.1

A = ADC(1)*10   ' every unit represent 0.1
A = A + 25          ' Add 2.5 to A
IF A > 5 THEN
   SETIO OUT1
ELSE
   CLRIO OUT2  ' do you actually mean to turn OFF OUT1 and not OUT2?
ENDIF

Not too difficult isn't it? Note that the output 1 and 2 should be defined as OUT1 and OUT2 in their label name table.

Title: Re:user defined function
Post by: kenobe on September 16, 2008, 10:34:45 PM

Thank you very much for your fast response.
but I have one question.

should the statement be

IF  a>50 ? instead of if A>5

Thanks

Title: Re:user defined function
Post by: support on September 17, 2008, 12:18:24 AM

Yeah you are right  :)