How to take single bit form input WORD by Structured Text

[Kaczi 0]

How to take single bit form input WORD by Structured Text? Can i write somethink like: inVar[i]   Edited 7 Dec 2015 by Kaczi

[innoaloe 59]

Yes you can. You need to declare the inVar as an Array of BOOL. That way you can access each bit independently using the syntax you write above, but the problem is you cannot access inVar as a Word   You can, however, do a bitwise AND to check the certain bit condition of a Word Variable. Say you declare inVar as a single WORD (not an Array), you can use this kind of script to check :   IF (InVar AND 1) > 0 THEN       (*Check whether Bit 00 of InVar is ON*)        (*Do something*) ELSIF (InVar AND 2) > 0 THEN (*Check whether Bit 01 of InVar is ON*)        (*Do other thing*) ELSE        (*Do other thing*) END_IF

[ndzied1 1]

Assuming InVar is your word, you should be able to use dot notation to get to any individual bit in the word. The 2nd bit is at InVar.2 10th bit is at  InVar.10 and so on....

[innoaloe 59]

Hello, unfortunately you cannot do that in CX-Programmer, either in Ladder Editor or Structured Text.

[panic mode 246]

in that case use AND operation with suitable bit mask... something like   bitTestValue = (inVar AND Mask)>0   where Mask is same size as inVar but it only has one bit set, for example: bit 0:   Mask= 1 bit 1:   Mask= 2 bit 2:   Mask= 4 bit 3:   Mask= 8 bit 4:   Mask= 16  etc