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extract bit status from word type

Created by: spf at: 4/14/2008 4:11 PM (2 Replies)

4/14/2008 4:11 PM	Rate (0)
spf Posts: 4 Rating: (0)	Hi, Someone knows how to extract the state of a bit from a byte type variable (declared like parameter of a block). Thanks,
spf Posts: 4 Rating: (0)
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4/14/2008 5:43 PM	Rate (1)
Denilson Pegaia Diamond Member Joined: 9/23/2005 Last visit: 12/26/2025 Posts: 4434 Rating: (1487)	Hi, I don't know a "magic" way to extract symbolically a bit of a byte. However I know alternatives: 1 - Do it by absolut adress: if a variable "aaa" has adress DIB0, you can acess its bits as A DIX0.x; Absolut adress is not effitientewith multi instance. In this case, copy the variable to a local variable before do the absolut access. 2 - Do it by manipulation of pointers: take the adress of the variable "aaa" and rebuilt the pointer to acess a bit. It is a lot of work... 3 - Work with masks and word logic. For example: L"aaa" L W#16#1 AW L 0 <>I = M 0.0
	Last edited by: Pegaia at: 4/14/2008 5:48 PM Denilson Pegaia Siemens Industry Sector Technical Support
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