Step 7 Function block
- Thread starter Ranjith
- Start date
DIX 8.0 is bit number 0 of byte 8. If you want to get the first "To_Step7" address then use DIB0.0 (byte). You may use DIB,DIX etc, but when you change the FB, e.g. add an input, the data block will be regenerated and the addresses may be changed.
Please use: "Fault reset" as text in your logics instead of DIX144.3.
Please use: "Fault reset" as text in your logics instead of DIX144.3.
L D[AR2P#0.0]
Lifetime Supporting Member
In cases like this, I create a temp structure and copy the byte from the array to the structure. I can then refer the individual structure elements by name and then the code will not need changing if the data areas are moved around by adding/deleting variables.
Code:
FUNCTION_BLOCK FB 1
TITLE =
VERSION : 0.1
VAR_INPUT
To_Step7 : ARRAY [1 .. 72 ] OF BYTE ;
END_VAR
VAR_OUTPUT
Connected : BOOL ;
Powered : BOOL ;
Ref_Done : BOOL ;
END_VAR
VAR_TEMP
ControlByte : STRUCT
Connected : BOOL ;
Powered : BOOL ;
Ref_Done : BOOL ;
END_STRUCT ;
END_VAR
BEGIN
NETWORK
TITLE =
L #To_Step7[1];
LAR1 P##ControlByte;
T B [AR1,P#0.0];
NETWORK
TITLE =
A #ControlByte.Connected;
= #Connected;
NETWORK
TITLE =
A #ControlByte.Powered;
= #Powered;
END_FUNCTION_BLOCKSimilar Topics
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