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INTRAC-305 ALARMS & ERRORS
© 2011 Advantech Wireless INTRAC-305 MANUAL - Issue 3.2 Page 51
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POWER FAILURE The INTRAC incorporates non-volatile memory and a battery
backed real time clock. The onset of a power failure is
detected and the current mode is stored before the processor
ceases to operate. When power is restored the INTRAC
performs an automatic recovery as below :-
If the unit was in Auto (Tracking) Mode at the time of the
power failure and no Primary Alarms have become active the
unit will resume tracking. The antenna will be moved (if
necessary) to the current satellite position based on the orbit
model and the real time clock.
If the unit was in Auto (Learning) Mode it will resume in that
mode. However whether it continues learning or re-starts to
learn depends on the ratio of the completed learning time to
the period without power. (i.e. how dependable the learnt
orbit will now be)
If the INTRAC was in any other Mode or if a Primary Alarm
had occurred the unit will power up in Standby Mode with a
power-up alarm.
ERRORS Errors are user errors and involve the entry of non valid data.
Where data is entered outside the allowable limits for that
data such as setting the beacon frequency outside the range
of the selected band. The entered data is changed to the limit
nearest to the entered value and marked with an asterisk (*).
On the bottom of the screen the message :-
“ENTRY ERROR!, limits forced =*”
is displayed.
The forced limit data may be accepted by re-pressing the
ENTER key or the correct value keyed in.
IESS-412 DATA Where IESS-412 data is entered with the incorrect 170hr
checksum the checksum is corrected by INTRAC in the same
manner as above. However it is up to the user to ascertain
that it was the checksum which was wrong and not that wrong
value data was entered.