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I would like to know if it's possible to compare 2 variables when they are 2 structures.
For exemple, I have a structure
TYPE ST_HmiToPlc :
STRUCT
B1 : bool;
B2 : bool;
A3 : array[1..9] of bool;
I4 : int;
END_STRUCT
END_TYPE
I declare 2 variables
Var1 : ST_HmiToPlc;
Var2 : ST_HmiToPlc;
And know I would like to know if values in VAR1 are différents than values in VAR2
I wrote
if VAR1<>VAR2 then TOTO:=TRUE; end_if
But it's not correct, I have the fault ERROR 4011: Type mismatch in parameter 1 of ''<>'' : Cannot convert 'ST_HmiToPlc' to 'ANY_NUM'
Do you have a solution ? I don't want to compare each value of the structure because I have near 200 values in my structure.
I know you can do this :
VAR1 := VAR2;
without fault, so I think it's possible to make some calcul on the VAR1
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you will have to use pointers in this case.
off course you can compare the internal of the structures like VAR1.A3[1] etc.
In the oscat.lib is a function to do this.
hello,
I would like to know if it's possible to compare 2 variables when they are 2 structures.
For exemple, I have a structure
TYPE ST_HmiToPlc :
STRUCT
B1 : bool;
B2 : bool;
A3 : array[1..9] of bool;
I4 : int;
END_STRUCT
END_TYPE
I declare 2 variables
Var1 : ST_HmiToPlc;
Var2 : ST_HmiToPlc;
And know I would like to know if values in VAR1 are différents than values in VAR2
I wrote
if VAR1<>VAR2 then TOTO:=TRUE; end_if
But it's not correct, I have the fault ERROR 4011: Type mismatch in parameter 1 of ''<>'' : Cannot convert 'ST_HmiToPlc' to 'ANY_NUM'
Do you have a solution ? I don't want to compare each value of the structure because I have near 200 values in my structure.
I know you can do this :
VAR1 := VAR2;
without fault, so I think it's possible to make some calcul on the VAR1
you will have to use pointers in this case.
off course you can compare the internal of the structures like VAR1.A3[1] etc.
In the oscat.lib is a function to do this.
however it is not 61131, but it works.
http://forum.codesys.com/viewtopic.php?f=11&t=5962
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Talk.ru: 1
Thanks for your help.
I found some information on oscat to solve my problem.