User`s guide

Troubleshooting
If you cannot talk to the Serial MODBUS Gateway, please
double check the following:
Verify the voltage on the red wire interfaced to our unit is
4.5V – 36.0 VDC. When powering the device you should see
the startup indicator lights ash red and green for ~4 seconds.
Verify the top and middle lights are green and the middle light
ashes when communicating with the MODBUS master. If
the middle light is not green, please refer to Section 2 Serial
MODBUS Gateway – Indicator Lights.
Verify your communication select jumper matches what you
are using, whether its RS-485 or RS-232C.
Verify the data lines, matching the colors of our wires to their
respective lines. See the image on page 3 to verify.
Verify your baud rate and operating mode.
If you have made changes to the baud rate, operating mode,
or other and have lost communication, perform a factory reset,
by opening up the Serial MODBUS gateway and nding the
COM reset and jumper. To do a factory reset, apply the jump-
er. Power on the gateway. Deliberately remove and replace
the jumper twice. All indicator lights will ash red quickly (5x /
sec) when the device has been successfully reset. Unpower the
gateway and remove the jumper. After powering the gateway
again, it will now operate with the factory default settings.
If there is an internal memory failure, all indicator lights will
stay red after startup. If this occurs, contact Monnit customer
support at 801-561-5555 or email at [e-mail].
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