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ICC
7.
LED Indicators
The gateway contains several different LED indicators, each of which conveys
important information about the status of the unit and connected networks. These
LEDs and their functions are summarized here.
7.1
Gateway Status
The gateway has one dichromatic LED to indicate the status of the device. On
startup, the LED blinks a startup sequence: Green, Red, Green, Red. Always
confirm this sequence upon powering the gateway to ensure the device is
functioning properly.
Solid green ............ The status LED lights solid green when the gateway has
power and is functioning normally.
Flashing green ....... The status LED flashes green when the gateway is
connected to a PC via a USB cable.
Flashing red ........... If a fatal error occurs, the status LED will flash a red error
code. The number of sequential blinks (followed by 2
seconds of OFF time) indicates the error code.
7.2
RS-485 Network Status
The gateway has one red and one green LED for each of the two RS-485 ports
to indicate the status of that RS-485 network.
Green (TX) LED .... Lights when the gateway is transmitting data on the RS-485
port.
Red (RX) LED ....... Lights when the gateway is receiving data on the RS-485
port. Note that this does not indicate the validity of the data
with respect to a particular protocol: only that data exists and
is being detected. Also note that if a 2-wire RS-485 network
is in use, that the corresponding RX LED will light in
conjunction with the TX LED (as transmitting devices on 2-
wire RS-485 networks also receive their own transmissions).
