DESIGNER’S HANDBOOK 4189350049C EN
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11.11.4.4
Relay controlled by internal flag:
If the predefined index/sub-index is an internal flag, the flag mask is used to determine which bits in the flag the
relay must react on. The flag mask value is multiplied with the flag value (using logic
“AND” function)
, and the
result controls the relay. This is also a function that must be preconfigured into the VS for a given virtual indicator,
and the detailed description will be in the library specification document.
11.11.5 Relay activation indication on a VI
The extended relay function in software platform 2 open also for indication of the relay status on the indicator
screen. It can for example be a text label that is presented when the relay is activated and another when it is
deactivated. For example, the text: Normal and Overload.
It can of cause also be a text that is only shown in case the relay is activated for ex. WIND WARNING !
The text line can for example be made as a text label that is controlled by the relay status flag function.
It can also be a graphical symbol that is shown in the VI indicator screen when the relay is activated,
for example, like this:
If you need a special warning or alarm function in your customized library, please take contact with the experts at
DEIF.
11.12 NMEA output using NX1 (or NX2)
Some data types, generated by the XDi via analogue or digital input, may be necessary for external systems, such
as Voyage Data Recorder (VDR) or the integrated navigation system. XDi is able to share such data on NMEA0183
with the same high digital data accuracy used in the XDi system. The XDi must have the NX1 NMEA output or NX2
NMEA in/out module installed, and the set up profile (VS) for the selected virtual indicator must be preconfigured to
support the NMEA output for the actual data type.
This function obviously requires a free slot for the NX module, but if data is shared to other XDi units using CAN
(for example XDi-net), then one of these other XDi units can be set up as an NMEA output source.
The NX1 module has one NMEA output port and the NX2 module has one standard NMEA output but the RS485
type output can also be configured as an output if it is not used as a NMEA input.
The NX module can be mounted in one of the two slots available on XDi 144/192 (only one slot on XDi 96). It is
possible to mount two NX modules on XDi144/192 at the same time and route data to each output individually. The
same data type can even be shared on both. This can be beneficial if the two systems need galvanic separation of
the outputs. (Note that normally, galvanic separation is obtained on the input side).
Example: in an RPM indicator system, the XDi with DX1 extension module is located in the engine control room
(ECR) and calculates the RPM value, based on the inductive pickup input signal. RPM data is shared on XDi-net
(CAN) with 2 XDi indicators on the bridge.
