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S5 to S7 CONVERTION

12/9/2010 6:00 PM	Rate (0)
fjmm Posts: 19 Rating: (1)	Dear Experts: I have more questions: In a FB4 is a SPA to FB 5 unconditional jump, (German nemonics) FB 5 NOMB.:SCAN-ALL A DB 101 : L DW 240 L KF +115 <=F SPB =M001 L KH 0041 T DW 241 T DW 243 L KF +1 T DW240 L KF +0 T DW 242 M001: NOP 0 : : :B DW 243 WHAT B NEMONICS MEANS?? WHICHIS THE S7 EQUIVALENT? :U M 0.0 = M 244.0 S M 131.0 : UN M 244.0 SPB =M002 L DW 240 T DW 250 M002:NOP 0 U M 131.0 UN M 244.1 L KT 005.2 SET 112 U T112 = M 244.1 UM 244.1 R M 131.0 : U M131.0 (please see below) SPB =M003 : L DW 242 L KF +1 +F T DW 242 L KF +8 >=F SPB =M004 ISU M131.0 the condition to jump? L DW 243 L KH 0100 : : ........CONTINUES Thank You FJ
fjmm Posts: 19 Rating: (1)
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12/10/2010 8:35 PM	Rate (0)
jklm Posts: 1742 Rating: (309)	Hello, 1) B DW243 U M0.0 means that you do not interrogate the flag M0.0 but the flag which number was loaded in DW243. (B = "Bearbeiten" means "do it with address specified in" DW243) The equivalent in step7 is indirect addressing. There are sevarl methods for indirect adressing in Step7. One possibility is like this: L P#5.1 T MD10 A M[MD10] ... This will interrogate the flag specified by MD10 (in this example M5.1) 2) U M 0.3 SPB = M003 means jump to label M003 if M0.3 is true, else do next statement 3) L DW 242 L KF +1 +F T DW 242 L KF +8 >=F SPB =M004 means that you increment DW242 by one, than you check if the result is greater or equal to 8, and if it is true, jump to lable M004, else do next statement
jklm Posts: 1742 Rating: (309)	Last edited by: jklm at: 12/10/2010 8:41 PM
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12/11/2010 7:02 AM	Rate (0)
fjmm Posts: 19 Rating: (1)	Hello jklm: ok, thank You Sir, the last part of point 3 was no clear to me. Best Regards FJ
fjmm Posts: 19 Rating: (1)
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12/11/2010 12:50 PM	Rate (0)
umencho Grandmaster-Expert Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	Hello, The logic 'jump" to M004 only if DW234 >=8. If not the logic continue in L DW 243 L KH 0100 : : ........CONTINUES And no M131.0 is not condition for jumping to M004 but for M003. All stars are for jklm . Best regards, Hristo Mihalev

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