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  1. J

    Modbus Architecture Question

    Great information. I hadn't considered the point about a longer-term storage connection. I have had trouble distinguishing edge gateways from historians. Same functionality really. What would you consider an Edge gateway? John R
  2. J

    Modbus Architecture Question

    Use a protocol gateway to move Modbus data to a PLC. (Modbus RTU/TCP to EtherNet/IP or PROFINET) Use a local Historian to move time-series Modbus data to long-term storage. (FTP or direct injection to an SQL database) Use an Edge gateway to move Modbus data to enterprise or Cloud applications...
  3. J

    What are the challenges to Convert Conventional Automation to iOT? How do you tackle challenges?

    "Convert Conventional Automation" ???? That displays a deep misunderstanding of what industrial automation is about, how it came to be and what today's challenges are. It doesn't need converting. It needs better cybersecurity solutions, it needs more analytic solutions, it needs more...
  4. J

    CompuWeigh CD-4000 Bulk Scale Controller

    Did you ever get that resolved?
  5. J

    Late bloomer to MODBUS have lots of silly questions

    Modbus in particular has devices that are almost 40 years old. Those devices have who knows how many revisions. Finding documentation for a particular device can feel like Christmas. Finding doc for the version of the device you have is like they say on the TV commercial "PRICELESS". Best to...
  6. J

    PLC to PLC communication between two different machines by different manufacturers

    Is this CCLink protocol? I probably don't understand that application but in general I am always hesitant to use CCLink for anything. It is HUGE in Japan but hard to find here. I would worry here about maintainability. Finding someone that can diagnose problems with that system would be...
  7. J

    Late bloomer to MODBUS have lots of silly questions

    Patrick is correct on everything. My top three sources of Modbus RTU frustrations: 1. Wiring is probably the source of most Modbus RTU issues. Make sure you have the right cable, the terminations are absolutely perfect and you have the terminations correct. One inperfect termination could cost...
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