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jimdi4

PLC 5 Quirk

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We have several PLC5 530 processors. We can view the online file on a laptop running ver 7.30 Rslogix 5. We have another file open on the laptop, thats basically identical to the online file. Includes same processor name different checksum though becasuse we made a change....Now heres the quirk...If I stay online with the laptop and open up another session of RSlogix 5 and open up a new file and then select run mode with the offline file, the offline file will go onlne with both files....its very strange...there is not even a prompt to say that the offline file doen't match the online file and please select a file...both files show that there both in run!!!! Rockwells explanation is logical, and the behaivior they explain for file selection and checksum generation and determination appear to have always worked in the past (at least what I experienced seeing), but what blows away Rockwells expalnation are two things that happen... 1). We had the file located on our desktop not in the Project File Search Path as Rockwell noted to do , and we still were able to load the offline file. 2). We made a change to the offline file and left it open... which should have altrered the checksum value, so now we have a file with the same porcessor name but different checksum....(also note the file was not in the Project FIle Search Path but on the desktop)...as the Rockwell rules stated Anyone else experience the same?

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Try it...first load the PLC 5 with a file for simplicity call it file A.... Then go online... Open up another RSlogix 5 session then open up file B.... Then then attempt to go online with file B... It will go online with file B and the filename on-top toolbar will change to the File A name and both sessions will be in run mode and both will show file A at the top toolbar... this may have existed for a long time with RSlogix 5 but we discovered it here accidentally while someone was doing a program validation...and ther person thought they loaded the correct program but did not... Edited by jimdi4

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