3/20/2009 12:23 PM | |
Posts: 557 Rating: (64) |
Dear Sydney, when we use L DW#16#8000001 LAR1 A [AR1,P#0.0] PLC show system fault, programming error. I think this code is only pointing P#0.0 IF YOU PUT ACCU1 L DW#16#80000000 LAR1 P 0.0 L DW#16#80000001 LAR1 P 0.1 I have develop some code by using Input & output sigmal, it seemok. find the attached online code.& you can also check on simatic manager & tell me your Observation.if you have a different Observation about indirect addressing.......... ..regards Attachmentprogram code.zip (277 Downloads) |
3/22/2009 6:01 AM | |
Posts: 557 Rating: (64) |
hi Phantom excellent answer.......... i have small confusion.... example OB1...........Suppose scan time 50ms so each & every 50 ms process image input & output will update............ now if i have network 1...........100.......full from logic...........then what is a difference between to 2 cases which are i am discribing below......... case 1.... OB1:. network 1 L 100 T PQW 512-----------Udate to module ???????? - - - - network 45 L 200 T PQW 512--------------again Udate to module ???????? case 2.... OB1:. network 1 L 100 T QW 512--------------wait till ot complet the scan....... - --------------------n/w1 to n/w44 value will be 100 after that - - network 45 L 200 T QW 512------------new value update & after complete the scan 200 will transfer to module......... is it a PLC uderstanding,please put your expert comment. regards |
3/22/2009 9:00 AM | |
Posts: 2661 Rating: (279) |
Hi Eastern, In case 1 the PQW512 will be updated twice, once in network 1 and again in network 45. And in case 2 the PQW 512 will be 200, it will never see 100. QW 512 will be 100 between network 1 and 45 but the ouput modules will only have the last value 200. Regards |
Follow us on