Accepting some difference in EQ operator

2021-10-20T14:09:25.782000Z

fixed it

Accepting some difference in EQ operator

2021-10-20T06:21:17.758000Z

Thank you so much tvm, this was exactly what i was looking for!

I did not find one among my library's so i built one and it works great.

If someone that is (even) newer to codesys than me and tries so build this there is a small typo in the program above, there are two i_Lower where one of them should be i_Upper but with that change it works great.

Many thanks!

Martin

Accepting some difference in EQ operator

2021-10-19T12:32:27.549000Z

Depending on what environment you're using, you might be able to find a LIM function in one of the libraries (NOTE: not the same as the LIMIT operator). If not, it's easy to make one:

FUNCTION LIM : BOOL
VAR_INPUT
    i_Test:     REAL;   //value to test
    i_Diff:     REAL;   //differential
END_VAR
LIM:= (i_Test >= (i_Test - i_Diff)) AND (i_Test <= (i_Test - i_Diff));  



//in your program
Start_Clapping:= LIM(Incoming_Real, 0.8);

Accepting some difference in EQ operator

2021-10-19T10:54:14.813000Z

Right now i have solved with

VAR
Incoming_REAL:Real; //This variable increases every cycle and depends on how log the Incoming_Real has been active and can therefore differ from run to run.

Add_On:Real:=10.5;
Gate_Bool:Bool;
Start_Clapping:Bool;
Upper_limit:REAL :=1;
Lower_limit:REAL :=2;
High:REAL;
LOW:REAL;
END_VAR

(with R_trig before both high and low)
HIGH:=Incoming_REAL + upper_limit + Add_on;
LOW:=Incoming_REAL + upper_Limit + Add_on;

and then made a GT on the lower limit and LT on the upper limit. This works but its everything but well written code.

Any other ideas for a better/easier code?

Accepting some difference in EQ operator

2021-10-19T09:33:06.412000Z

Hi!

I´m looking for a function/way to get the = function (or similar) to accept numbers that are not exactly alike.

For example,
VAR
Incoming_REAL:Real; //This variable increases every cycle and depends on how log the Incoming_Real has been active and can therefore differ from run to run.

Add_On:Real:=10.5;
Gate_Bool:Bool;
Start_Clapping:Bool;
END_VAR

If Gate_Bool=true
then
Add_on:=Incoming_REAL + Add_on // This increases the Add_On variable with the number from Incoming_Real.
End_IF

If Add_On=Incoming_REAL
then
Start_Clapping:=True;

So i would like the Add_on=Incoming_Real to be a bit accepting and
having something like

Start_Clapping:= Add_on=Incoming_Real (+ 0-8 or - 0.8)

This code is just to explain, it probably holds some errors but hopefully you will understand what i´m looking for.

IS there a way to do something like

Add_on>= 0.8 or <= 0.8 from Incoming_REAL

Best,

Martin

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