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Chapter Four
DIAGNOSTICS
4.1 Diagnostics Chart
LED Indicator
Condition
Meaning
OK GREEN
Normal
Operation
OK
RED
Supply voltage too low.
Radio RX
GREEN flash
Radio receiving data
Radio RX
RED flash
Weak radio signal
Radio TX
Flash
Radio Transmitting
Radio LINK
On
On when a radio communications link is estab-
lished
Radio LINK
Off
Communications failure or radio link not estab-
lished
Radio LINK
GREEN flash
RED flash
Serial Port Receiving
CTS low
LAN
ON
Link Established on Ethernet port
LAN
Flash
Activity on Ethernet port.
Serial
GREEN flash
RS-232 Serial Port Activity
Serial
RED flash
RS-485 Serial Port Activity
DIO
On
Digital Output ON
or
Input is grounded.
DIO
Off
Digital Output OFF
and
Input is open circuit.
The green Active LED on the front panel indicates correct operation of the unit. This
LED turns red on failure as described above. When the Active LED turns red shutdown
state is indicated.
On processor failure, or on failure during startup diagnostics, the unit
shuts down, and remains in shutdown until the fault is rectified.