converter Allen-BradleySLC500 to SimaticS7

[Guest dudek]

I'm writing converter Allen-BradleySLC500 to SimaticS7 and I got problem with ladders like XIO B9:3/1 XIO B9:5/1 BST XIC I:3.0/1 NXB BND OTE B3:18/14     ¦N¦ ¦N¦   ¦ ¦    / \  -¦O+-¦O+-+-¦ ¦-+--+ +-   ¦T¦ ¦T¦ ¦ ¦ ¦ ¦  \ /           ¦     ¦           +-----+ My converter translate this ladder to network: AN       DB9.DBX3.1;   //B9:3/1   AN       DB9.DBX5.1;   //B9:5/1 A(         A       I30.1;   //I:3.0/1   O           )         =       DB3.DBX18.14;   //B3:18/14 This network don't work exactly like AB ladder, probably like this:   ¦N¦ ¦N¦   ¦ ¦    / \  -¦O+-¦O+-+-¦ ¦----+ +-   ¦T¦ ¦T¦ ¦ ¦ ¦    \ /           ¦                 +----   Any ideas how to convert this ladder without many changes in network? ps. If you are interested help in development of project, please send interesting, working Allen-Bradley projects for test aims. My email dudek474@poczta.onet.pl. Regards, Jacek.

[jacekd]

I'd try some thing like this: A( O( A I30.1 ) O( SET <-- "empty" branch ) ) Maybe it's not the most efficient method but it should work. Regards, Jacek

[Guest Guest]

Many PLCs (but not S7 300 and 400) have a Flag bit that is allways on. Also S7-200 has. I would place a symbolic "O ALWAYS_ON" here. Then, if you can give a symbom list to your converter, you can ALLWAYS_ON resolve to some physical address choosen by the user. In case of S7-300/400, you place some extra code, either in the 1st Network or into OB100 that says: SET = ALLWAYS_ON In case of S7-200 you just predefine ALLWAYS_ON SM0.0 in a predefined symbol file for conversion target S7-200. So you end up with a symbol file and an "extra code file" for a target. These files then could be included in projekt symbol file and project code file. Thus, the converter deal with other things too, like clocks or conversion from AB B, N and F files to Siemens DBs or V memory and could extended to other targets as well.