Maretron Alarm Module ALM100 - Manual (Page 10)

ALM100 User's Manual
Page A6 Appendix A – NMEA 2000 Interfacing Revision 1.1
2.5.1 Instance
NMEA 2000
®
provides for a unique annunciator instance for each alarm device on a vessel.
This field allows a display device such as Maretron N2KView or a DSM250 to select different
annunciators for sounding alarms for different alert types. For instance, an alert specific to
engine operation may only sound in the engine room, pilot house, and crew quarters, while a
general alarm would sound throughout the ship. This value should be programmed in each
ALM100 so that each ALM100 is associated with a unique instance number. The default
instance number is 0, which is used to indicate the first ALM100 that is hooked to the network.
Subsequent ALM100s connected to the network would be numbered 1, 2, and so on.
2.5.2 Label
The ALM100 may be programmed with a text label that will be displayed in monitoring software
and displays that recognize device labels, such as the Maretron N2KView Vessel Monitoring
System and the Maretron DSM250 display. The label will let you assign an easy-to-remember
text label (example: “Alarm in Pilothouse”) to make it easy for you to identify the device as you
are configuring the monitoring software or display, as well as when alerts are generated.
2.5.3 Test Annunciator
Devices capable of configuring the ALM100 also have the ability to cause the ALM100 to
generate an alarm indication, flashing the red alarm LED and sounding the annunciator. You
may use this function to determine whether the ALM100 is properly connected and configured.
When you select this option, the red alarm LED and annunciator will be activated for a short
period of time.
2.5.4 Advanced Configuration…
Certain parameters do not normally need to be set in order for normal operation, but are
included in an advanced configuration section for use in special situations.
2.5.4.1 Device Instance
NMEA 2000
®
provides for a unique device instance for each alarm device on a vessel. This
value should be programmed in each ALM100 so that each ALM100 is associated with a
unique device instance number. The default instance number is 0, which is used to indicate the
first ALM100 that is hooked to the network. Subsequent ALM100s connected to the network
would be numbered 1, 2, and so on.
2.5.4.2 NMEA 2000
®
PGN Enable/Disable
The ALM100 is capable of transmitting NMEA 2000
®
messages (or PGNs) associated with
monitored switch circuits. You may individually enable or disable each of these messages. You
may also change the rate of transmission of each of these messages if desired.
2.5.4.3 Restore Factory Defaults
Selecting this configuration option causes all stored parameters in the ALM100 to be reset to
the values they contained when the unit was manufactured.