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  1. VortechsAuto

    Basic machine control

    Unless the wiring was intentionally changed, it probably isn't wrong. What is more likely is that something broke or a wire came off/got disconnected. Having a wiring diagram will be very helpful.
  2. VortechsAuto

    Modbus device only works with one specific RS485 converter... Why??

    Thanks for the advice. I plan to stay away from BACnet in any fashion in the future! Not good for industrial automation.
  3. VortechsAuto

    Modbus device only works with one specific RS485 converter... Why??

    Good thinking jschulze. I noticed that the Microflex used the MAX13487 chip and the other device used either a regular MAX485 chip or "mystery" chip. I'm just not smart enough on a chip level to understand all of the stuff on the data sheet. I did read most of it though! The Microflex does...
  4. VortechsAuto

    Modbus device only works with one specific RS485 converter... Why??

    Thank you both for your thoughts and comments. The 284 is running off of 24vdc and is does not have anything connected to the ground terminal. All of the tests with a laptop were with the laptop running on battery. I don't think there was any issue with grounding. The test to the PLC was...
  5. VortechsAuto

    Modbus device only works with one specific RS485 converter... Why??

    Hello All! I am new to this forum but have been doing a lot of reading and there are some very smart people posting here. I figured I would throw this one out there to see what comes up. I have been in the industrial controls and automation industry for 20+ years and works with many different...
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