Advantech user manual INTRAC-305 Alarms & Errors, Power Failure, IESS-412 Data

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INTRAC-305	ALARMS & ERRORS
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.

© 2011 Advantech Wireless INTRAC-305 MANUAL - Issue 3.2 Page 51