User's Manual

CHAPTER 2
LED Indicators
15
If this is a new installation, you need to install the RTUs in the field
and configure them in addVANTAGE. Refer to the addVANTAGE
software and respective RTU user manuals for additional details.
LED Indicators
The A840 Telemetry Gateway has five LED indicators on its panel.
The indicators have a different significance based on whether the
device is operating in the usual Linux mode or in hermit mode (for
upgrading software and in other unusual circumstances).
“Advanced Functions” on page 17 provides more details about
the operating modes.
Linux Mode
LAN and ACT
These two LEDs are active only if you have a network cable
attached to the gateway and the network section is enabled. In
addition, the mains (110/220 volt) must be present, that is, the
gateway must not run on its internal batteries. The LAN LED is lit
while the ethernet line is operational, and the ACT LED shows
activity on the ethernet line.
Note: Although most of the network functionality is already built
into your gateway, it is not enabled by default. You must
contact Adcon or your distributor if you want to enable net-
working in your gateway.
USR and RUN
The USR LED lights when communication takes place over the RS-
485 line, that is, to or from the A440 Wireless Modem unit. The
RUN LED is currently not used in Linux mode.