Chapter 3 Operating the ETC II
Controls and Indicators
12
ETC II Network Communicator
Chapter 3
Operating the ETC II
Controls and Indicators
PROG-RUN Switch
The ETC II has a PROG-RUN switch that puts the device into program mode
for local servicing and programming. The switch must be in the RUN position
for normal device operation.
Put the PROG-RUN switch in the PROG position for setting up your device
or upgrading device firmware via a Terminal program (see
Using
HyperTerminal
in Chapter 4 for instructions).
LED Indicators
Figure 3-1 Indicator LEDs
The ETC II has two yellow device status LEDs and eight green network
status LEDs that show the present device status and activity on
communication ports.
The flashing yellow CPU LED indicates the device status as follows:
The CPU LED flashing for one second with a one-second pause
indicates that the device is in the operational state and is functioning
normally. Depending on the position of the PROG-RUN switch, the
COM3 service port is available for communications via a Terminal
program or for master communications.
The CPU LED flashing briefly 2 times with a one-second pause
indicates that the device is in service mode and is not operational.
The CPU LED flashing briefly 3 times with a one-second pause
indicates that a critical error has occurred and the device is not
operational. Contact your local distributor for servicing.
The yellow BATTERY LOW LED lights up when the backup battery is near
the end of its operational life and should be replaced.
The network status LEDs indicate activity on communication ports as follow:
COM2 Cellular port optional plug-in module (future): the RX and TX
LEDs flash when the device communicate with the Cellular Modem
port.
COM3, COM4 and COM5 serial ports: the RX and TX LEDs flash
when the device receives or transmits data via a port.
Modes of Operation
Operational Mode
In the operational mode, the device services the Internet to serial gateway
connections from client applications, and the COM3 port operates in slave
mode allowing serial-to-serial network connections.
