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Using DB's in PCs7

Created by: MemoGG at: 2/16/2010 2:04 AM (3 Replies)

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2/16/2010 2:04 AM	Rate (0)
MemoGG Advanced Member Joined: 2/20/2009 Last visit: 7/6/2022 Posts: 53 Rating: (0)	Hi Everybody, I need to define a word in a DB and set its bits from CFC's,and after filling those bits I need to use the whole word as a paramter inside a function, that is I need to use the word as a whole and individually bit by bit. How do you reccomend to define it inside the DB (word, bool, struct?) to do the job? Please, tell me also how to address it in the CFC block calls (interconnection to address, for instance). One more thing, I have been testing the application using physical (or numeric) addresses, like db1.dbw8, for example, but that seems to me a rather primitive way, since the application depends on a fixed address inside the DB and if later is changed, it won't be a good thing... Any ideas? Thanks in advance

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2/16/2010 5:56 AM	Rate (0)
daga Gold Member Joined: 3/18/2009 Last visit: 2/8/2022 Posts: 306 Rating: (93)	Are you always doing a "boolean" write and a "word" read? If so, why don't you just use the "BO_W" convert function and avoid using DB altogether.

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2/16/2010 3:03 PM	Rate (0)
CBo Gold Member Joined: 4/5/2006 Last visit: 3/18/2023 Posts: 917 Rating: (63)	Hi MemoGG, it possible to do using CFC block like "DW_BO", "BO_W" and so on (word/bit conversion) for example: -using W_BO it possible read a word from DB and use information like bits -using BO_W it possible write bits on the input parameter block and connecta DBx.DWy on the output parameter block By symbolic name for DB are you using, it possible use instead DBx.DWx syntax To connect symbolic name in CFC just right click on the CFC parameter you want connect, select interconnection and browse on the DB/DW you want P.S.: no array can be connected andstructure neither (only structure level 1 - main structure automatically generate when create DB) hope can help regards
	Last edited by: CBo at: 2/16/2010 3:04 PM
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2/18/2010 12:51 AM	Rate (0)
MemoGG Advanced Member Joined: 2/20/2009 Last visit: 7/6/2022 Posts: 53 Rating: (0)	Thanks, I've tried those functions and they fit perfect in my application to pack and unpack bits in a word. Best Regards

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