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engineer118

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  1. Unfortunately transferring the PLC motherboard doesn't help the case of being able to view the program/future proof the application without doing a full redesign and rebuild. How is it possible the PLC has retained it's program if the battery hasn't been changed since 2008 and we have had multiple annual shutdowns where the PLC would have lost power? Which is why I don't see how the program hasn't been burned during the initial download. There was a 7 digit password noted on some of the drawings found with the PLC, is there somewhere I can put this into Visilogic to see if it's stopping me from uploading?
  2. Is there a way to do this through visilogic? Unfortunately the HMI screen is completely black so there is no possibility of navigating to INFO mode from the HMI (Information Mode (unitronicsplc.com))
  3. I have a V570 with a broken HMI (black screen) but we have proved the PLC is still operational by testing the trips it commands. Unfortunately the program is >10 years old and no records were kept. The original supplier also does not have records. I have successfully connected to the controller via USB To serial cable. Unfortunately attempting an upload was met with Warning 224 “the project cannot be uploaded because: - the option burn upload project was not selected when the project was downloaded, or - due to incomplete data in the PLC”. There is also “error - no valid upload data has been found in the PLC”. I am sure the project must have been burned into memory as we have never replaced any PLC batteries and we have an annual shutdown which would drop power to this PLC. Is there any way to get around this warning/error and get the program off the PLC? I found a password written on a drawing inside the cabinet - just wondering where I could try put this in if it is what is stopping the upload from working?
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