User`s guide

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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 flash red and green for ~4 seconds.
Verify the top and middle lights are green and the middle light flashes 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
it is 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 finding the COM reset and jumper. To do a factory reset, apply
the jumper. Power on the gateway. Deliberately remove and replace the jumper
twice. All indicator lights will flash 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
[e-mail]
.
For additional technical support and troubleshooting tips please visit our
support library online at http://www.monnit.com/support/.
If you are unable to
solve your issue using our online support, email Monnit support at
[e-mail]
with your contact information and a description of the
problem, and a support representative will respond within one business day.
For error reporting, please email a full description of the error to
[e-mail]
.