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P2-550 memory goes crazy when stop mode transfer or PLC switch to stop

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  • P2-550 memory goes crazy when stop mode transfer or PLC switch to stop

    I might have downloaded a wrong hardware configuration, but I fixed the hardware configuration then I even did the CPU remove project, i still get crazy values for my tags - I then set all the initial values in my projects but not working. The project works fine until the CPU starts after a stop - all the tags' value become wired numbers, I have to use data view to set those tags online and they work.

    Any ideas?


  • #2
    Did you try deleting the entire project (CPU > Remove CPU project) from the PLC, then re-uploading the project from Productivity Suite?

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    • #3
      Thank you, Brandon. Yes, I did. I tried several times re-download the whole program to PLC, but it did the same thing - I start to wonder if Productivity has a dedicated retentive memory and it is corrupted or the system retentive memory loader has a pointer bug.

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      • #4
        Interesting. I've never run into anything like that and I've purposely uploaded incorrect hardware configs.

        What version of software are you using? You may be able to force a firmware update? Alternately, pulling power AND the backup battery will clear the memory.

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        • #5
          Post a pic of Tools.Options. Project Transfer tab setup

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          • #6
            Here you are the setup.
            Attached Files

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            • #7
              I will try to check the battery.

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              • #8
                I have had this happen several times lately. I had to cycle power and reload the file.

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                • #9
                  Taken battery off did work for a few minute but failed again after switch it off then back on. Attached are the values from the data view. I replaced with a new CPU and the new CPU works. Something wrong with the old CPU, but Gadget says he sees the same problem - i hope it is not a bug.

                  Thanks for all the helps. I will just dump the old CPU and work with the new one.
                  Attached Files

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                  • #10
                    Can you try a firmware and MAYBE a software rev change. I had a P3-550 that thought that a constant value of 1 equaled 1,036,831,949
                    That post was made when I had issues posting images.

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