Table of Contents
Advertisement
LED
Radio
Fault
Flash
Patterns
#
Flash
Reason
1
S-L-L-L
Internal radio fault
2
S-S-L-L
Power
detected when radio should be off
3
S-L-S-L
Full power not attained
4
S-S-S-L
Full Dower not sustained after transmission
k
haA
]tion
.c\
5
I S-L-L-S
I
VSWR .". . .
CRC
S-S-L-S
RAM/EEPROM
corrup
S=Short flash (150mS); L=Long flash (600rr,~,
#= Fault code number. See "S;' command in"the TESTING
THE 7720V2 section
for additional
status information.
Low Battery Detection & Restoral
(The following features are supported in software versions 2.16 and higher)
Low
Battery
Detection
Entering
the
Battery
Charging
Mode.
Condition
of
Radio
while
in Charging
Mode
Messages
sent
upon
Exiting
Charging
Mode
The radio tests the condition of the baflery during every transmission.
If the battery
voltage is low during four consecutive transmissions, yet transmission power is not
impaired, a low battery warning message will be transmitted. As long as the transmission
power has not been significantly derated, the radio will resume normal operation.
The low battery warning will be restored orIly after the radio has found the battery to be
good during four consecutive transmission
and
a minimum of four hours have elapsed
since the radio first detected the battery in the restoral state.
Battery Charging Mode is entered upon either of two conditions:
1. On Power Up, the radio tests the battery to determine whether a transmission can
be supported. If the battery fails this initial test, the radio enters Battery Charging
Mode.
NOTE:
Due to this feature the
battery
must
be plugged
in before
applying
charging
voltage
during
initial
power
up
to the 7720V2 to prevent it
from entering charging mode.
2.
During radio transmission, the battery is tested by the 7720V2.
If the battery is
unable to support a transmission the radio enters Battery Charging mode.
Upon entering the battery charging mode, the fault relay is tripped, indicating that the
radio is inactive. During the Battery Charging Mode, the Red LED will
flash once
per second,
the Green and Yellow LED's remain off.
In Charging Mode, the radio is in an idle state for
a minimum of
fifteen minutes. At the
end of a fifteen minute cycle time, the radio performs a series of tests on the battery. If
all these tests pass, the radio will resume normal operation. If any of these tests fail, the
radio will remain idle while it repeats the tests every fifteen minutes until passing.
While in charging mode, the radio will continue to monitor the serial port. The radio will
respond only to a reset command from the 7720P (Shift -X). Any other command will
result in a display of "BAT CHG" on the 7720P.
Upon exiting the charging mode, the radio will reset the fault relay (if it was latched).
If the radio entered charging mode on power up or during the power on reset
transmission cycle, the normal power on reset message will be transmitted when
charging mode is exited.
If the radio entered charging mode during normal operation, a message indicating a
restore of the battery as well as a "restore" of the power on reset (message type 6 with a
3 in both the power on reset position and the battery status position) till be transmitted.
This is a unique message which will only be sent on exiting the charging mode (e.g.,
5353555 6)
The status of the zones is cleared upon entering the charging mode and is not
monitored while in charging mode. Therefore, the only alarm information on any of the
zones will be that which is currently on the zone inputs at the time of exiting charging
mode (no stale/pending alarms will be sent).
If a zone is currently in alarm, that alarm will be sent after half of the power on reset
sequence is transmitted.
-
-4-
Advertisement
Table of Contents
