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conversion of LIR 1??

8/26/2009 11:39 AM	Rate (0)
Aymen Posts: 10 Rating: (0)	Dear all i want to convert this pieace of S5 instruction to S7 which contain LIR1 : FB234 nom :DASA Design EQNR E BY L =EQNR B MW 196 A DB 0 L DW 9 TAK < F BEB L DW8 : F T MD 250 L DW6 +F LIR1 ......... As I Know to convert LIR1 i must have value of accumulateur1 which is the conserned adress so LIR1 is replaced by the value of this adress. but using only the programm and i know that the plc is related to an old op 3XX ,how can i resolve this problem?? (i think that i have to know the realtime value of (mw196,dw9,dw8,dw6) which is only possible if i am near the PLC????) for more details i attached the plc program. thnaks and best regards. Attachment BEJA42ST.zip (408 Downloads)
Aymen Posts: 10 Rating: (0)
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8/26/2009 2:28 PM	Rate (0)
gcor Advanced Member Joined: 7/17/2008 Last visit: 10/25/2013 Posts: 34 Rating: (2)	Hi Aymen, In S5 you have ACC1 left word, ACC1 right word, because you use 16bit operators. From you code, imagine that you have the value KH 666 in accumulator prior to LIR1 LIR 1 write contents of the memory cell having the address KH 666are loaded in to ACC1 (right word) If you want to load the value 16#1111 only in the right word of S7 accu, you can T MD 100 //backup accu in aux flag L 16#1111 // load value T MW 102 // write the right word of the backup L MD 100 //restorind modified backup Hope this helps Regards

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