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Design & Integration

SRPM, SRCM & MRMS Not Communicating

  1. Make sure (+) signal is correctly connected to (+) pin in all devices. Same for (-) signal and Ref (GND) signal. Our devices are 1.5 pairs, meaning that it is preferred all 3 wires are used (+, -, and GND). GND is the reference signal to the other two signals. The ground wire should be a conductor, not the shielding.

  2. Check that all baud rates are the same.

  3. Check MAC addresses. Every device should have a different address per branch, or segment or trunk of a network.

  4. Check device instances. Every device should have a different instance number across the entire network.


    *The Dip Switch #1 must be enabled to make Network setting changes like baud rates, MAC addresses, and Device Instances*


    **Anytime a change to Network settings is made, power must be cycled**


  5. Enable the pull up (Dip Switch #3) and pull down (Dip Switch #5) resistors on the MRMS. Be sure the device that is in the last position has the terminating resistor enabled (EOL) (Dip Switch #4 on the MRMS). Then power cycle the units.

SRPM, SRCM & MRMS Not Communicating