3/14/2011 12:02 PM | |
Joined: 9/23/2005 Last visit: 10/18/2024 Posts: 4350 Rating: (1448)
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Hi, What you mean with "Open DB"? |
Denilson Pegaia |
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3/14/2011 10:42 PM | |
Joined: 5/4/2009 Last visit: 5/28/2024 Posts: 914 Rating: (40) |
I think he means a "shared" or global data block. Please see attached. Have luck. Tomy. |
Aim Higher |
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3/15/2011 3:26 AM | |
Joined: 10/7/2005 Last visit: 10/20/2024 Posts: 3024 Rating: (1054) |
Hello layudhi TIA Portal V10.5 supports only the so called "fully qualified" DB variable access mechanims which means the DB and variable number"belong together" in one instruction(e.g. %DB1.DBW2"). What you are after is the so called "partial" DB access which allows seperate opening of a DB (e.g. "OPN DB1")followed by access to its variables without the DB number in front of them (e.g. "DBW2"). Step 7 supports the "partial" DB accessmechanims (and has to be able to as its a requirements for indirect addressing and also for backword compatibility reasons with Step 5). TIA Portal V10.5 (and as such 1200 CPU's) does NOT support this, the soon to be released TIA Portal V11 will/should again support it though (possibly only for programming of S7-300 and 400's though). I hope this helps |
Cheers |
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