Operation
RFI-9256 Radio Modem User Manual
Page 40 of 109
Mode
Network Link on Master
Online (both Master and Slave)
Point-to-
point
LED is On whenever a point-to-point
connection is established with a
slave, and is turned Off when the
point-to-point connection is closed.
In turning Off it waits for 3 x
network link timeout (ms).
While there is no point-to-point link established, the
LED is Off. Once the point-to-point link is
established the LED is set On (green).
If connection is severed, both units will flash the
Online light red every time a packet is dropped due
to running out of retries. This will happen once per
online request poll (defaults to 3 seconds). Once the
network link light is turned red, the online light will
be turned Off.
Point-to-
multipoint
Broadcast
Turns green whenever data is
received. Turns Off again after no
data has been received for 3 x
network link timeout (ms).
Turns green whenever data is received. Turns Off
after a short period with no data.
Hayes
Dial-up
LED is On whenever a dial-up
connection is established with the
slave, is turned Off when the dial-up
connection is closed. In turning Off it
waits for 3 x network link timeout
(ms).
While there is no dial-up connection, the LED is
Off. Once the dial-up connection is established, the
LED is set On (green).
If connection is severed, the dialler (source of the
connection) will flash the Online light red every
time a packet is dropped due to running out of
retries. This will happen (in the absence of data)
once per online request poll. Once the network link
LED is turned red, the online light will turn black.
The receiver (destination) will turn its online light
Off immediately upon losing the first online request
from the dialler.
SCADA
protocol
networks
Turns green whenever data is
received. Turns Off again after no
data has been received for 3 x
network link timeout (ms).
Turns green whenever data is received. Turns Off
after a short period with no data.
Table 11: Network link and online functionality in different protocol modes
Network link always functions the same way on the slave unit, regardless of protocol mode. On a slave
network link comes on whenever the slave has successfully locked with a master radio and is hopping with
it. It will be turned off after the time specified 2 x network link timeout (ms) passes without the slave
receiving its master's transmission.
When a serial port output (DCD or CTS) has been configured to follow online or follow network link, the
output will be high so long as online or network link is red or green. Once online or network link goes black
the serial port output will go low.
