700-G6-DB- Man Rev. 1 dft5 11 Feb 2021
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The failsafe can be re-enabled by using the ASCII clear failsafe command (Section 6.5.1) or following
the next steps:
•
Press the
FAILSAFE
button and hold for 2 seconds, if:
o
If the LED
FAULT
blinks one time, the failsafe is cleared
o
If the LED
FAULT
blinks two times, the failsafe has been tripped; a failure occurred.
•
To restart, press the
FAILSAFE
button for 10 seconds.
NOTE:
The
FAILSAFE
will not be reset by power cycling the transmitter using the reset
function (Section 4.2.3).
4.2.3
RESET FUNCTION
The RESET function is used to restart the transmitter. This function will start the transmitter the
same way as an initial power up or power reset. To do this, perform the following steps:
•
Press the RESET button for at least 1 second.
Note that the failsafe will not be restarted if has been previously tripped. In case this happens,
follow the function procedures. After the RESET, the GPS may take up to 20 minutes to recognize the
antenna, finish the synchronization and obtain a position and time reference.
4.2.4
GPS SYNCHRONIZATION
After power is first applied to the transmitter and the initialization sequence is completed, the LED
GPS will illuminate indicating that the transmitter is acquiring a GPS fix and is trying to synchronize
its clock to UTC time. This can take as long as twenty minutes as a complete list of satellites needs to
be checked to ensure location and time synchronization. Once the transmitter is synchronized, it will
be able to transmit on the specified time schedule.
After initial time synchronization, the transmitter will attempt a single resynchronization to UTC time
every 24 hours to correct any potential time drifts in the clock. The transmitter is capable of
operating for 28 days without a time resynchronization. After 28 days, if a time resynchronization is
not achieved, the transmitter will disable transmissions. However, it will continue to attempt time
resynchronization and, if successful, will re-enable transmissions.
NOTE:
If the transmitter cannot synchronize to UTC time during the first 20 minutes,
the transmitter will switch off the GPS module for one minute and then will restart
the synchronization cycle. This process continues until the transmitter successfully
synchronizes to UTC time.
