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A Selectron CPU831 TCMS/PLC on a workbench, being probed and programmed.

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https://object.ceph-waw3.hswaw.net/mastodon-prod/media_attachments/files/111/528/164/371/123/713/original/4753298f022e1259.png

Notices where this attachment appears

  1. q3k :blobcatcoffee: (q3k@social.hackerspace.pl)'s status on Wednesday, 06-Dec-2023 02:47:24 JST q3k :blobcatcoffee: q3k :blobcatcoffee:
    in reply to

    We found that the PLC code actually contained logic that would lock up the train with bogus error codes after some date, or if the train wasn't running for a given time. One version of the controller actually contained GPS coordinates to contain the behaviour to third party workshops.

    It was also possible to unlock the trains by pressing a key combination in the cabin controls. None of this was documented.

    2/4

    In conversation about a year ago from social.hackerspace.pl permalink
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