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Indirect addressing


Junji
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Could you give me an example how to use indirect addressing technique? Our customer wants to run a motor along commanded position data computed by C-PLC program on shared memory user buffer. I guess User servo can copy the data to commanded position register every servo cycle.
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You should not need to use indirect addressing since we have data predefined structures to access the user buffer. To access the user buffer from the Cplc or Capp follow the examples in this post http://forums.deltatau.com/showthread.php?tid=17&highlight=user+buffer the better example are towards the last listings. From the PPmac either in script programs or the terminal you can use the structure Sys.ddata[n]. To increment through it just use a local variable for the index. open plc 1 local myIndex; local myVar; myIndex = 0; while(myIndex < 10){ myVar = Sys.Ddata[myIndex]; myIndex++; } close For a few more details take a look at the attached traing excerpt.
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