Installation manual

Page 22
SYSTEM ALARMS
An alarm event state will always generate a message for sending to an IBS or remote
alarm panel as well as actuating the NAV-7’s remote alarm relay contacts.
The front panel LED and the buzzer are programmable – see Setup mode:
System options. Consequently, these indicators may or may not activate to
indicate an alarm.
The NAV-7 may generate alarms with the following alarm numbers:
Alarm
number
Alarm text
001 NAVTEX: Navigational warning
002 NAVTEX: Meteorological warning
003 NAVTEX: Search and rescue information
004 NAVTEX: Receiver (x) malfunction
006 NAVTEX: General failure
052 NAVTEX: Antenna error
053 NAVTEX: Antenna overload
RECEIVER MONITORING
The NAV-7 continuously monitors the signals being received, and generates a
“Receiver (x) malfunction” alarm (ID code 004) should any receiver appear to be
operating incorrectly. The “x” in the alarm message is 1 for the 490 kHz receiver; 2 for
the 518 kHz receiver and 3 for the 4209.5 kHz receiver.
Serial interfaces
The NAV-7 has two IEC 61162-2 compatible serial interfaces which can be used to
connect the NAV-7 to other equipment such as an integrated bridge system or a PC
running charting software. The IEC 61162-2 serial interfaces also allow for the
connection of a serial printer. The integrated bridge system should be connected to
the IBS port of the NAV-7 (using the 15-way D-type socket at the rear).
Printer Operation (option)
When the ‘Printer mode’ setting on the Setup mode : Serial options page is
set to ‘On Receipt’, the NAV-7 outputs every message to the printer as it is received,
subject to the control of the message filters. In this mode, the NAV-7 operates in a
similar manner to a traditional ‘paper-based’ NAVTEX receiver.
However, in order to conserve paper, when the ‘Printer mode’ setting on the
Setup mode : Serial options page is set to ‘On Demand’, the NAV-7 will only
print messages when instructed to do so.
To print all messages as they are received:
Set the ‘Printer mode’ setting to ‘On receipt’