Japan Radio Co. JLR-8400, Инструкция по эксплуатации

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4.15.2 Selecting a dimmer unit
Specify whether an external dimmer unit (NCM-227) or a dimmer key is used for controlling the
dimmer unit of this display unit.
When an external dimmer unit is used, the contact point input must be set to “DIMMER”. For the
setting method, see "4.15.5 Setting Contact Input”.
When sharing a dimmer unit, set the same dimmer unit for the display units that share the dimmer
unit.
Unless the same dimmer unit is set, linking cannot be performed.
To calibrate the external dimmer unit, refer to "7.1 Calibration of External Dimmer Unit "in service
manual.
1. Refer to "4.15.1 Changing to a maintenance mode" and display a maintenance menu.
2. Select “DIMMER” by using .
3. Select a dimmer unit by using and press .
4.15.3 Dimmer linked control and data sharing with RS-485
By connecting display units with RS-485 network, dimmer control can be linked and data can be
shared.
To connect display units with RS-485 network, the display units must be identified by setting RS-485ID
in each display unit.
Up to 10 display units can be connected.
The same baud rate must be set for all the display units. Normally, the baud rate is set to 115200bps.
It is possible to select key control or control by an external dimmer unit for dimmer control. Display
units that are linked can be selected by classifying display units under dimmer control into groups.
However, the same control method such as key control or control using an external dimmer unit must
be applied among the display units that are linked. Up to 10 groups are allowed.
Data can be shared by outputting a NMEA sentence to the RS-485 network.
By sharing data, the same data can be displayed.
A typical connection example for implementing dimmer control and data sharing with RS-485 is shown
below. Refer to the setting reference section for the setting method.
The connection conditions of the connection example are as follows.
Display unit
1
Display unit
2
Display unit
3
Display unit
4
Setting
reference
section
RS-485ID 1 2 3 4 4.15.3.1
Dimmer control unit External
dimmer unit External
dimmer unit Dimmer key Dimmer key 4.15.2
Dimmer group 1 1 2 2 4.15.3.3
Input data GPS - - - LAT/LON 4.15.4.2
RS-485 LAT/LON LAT/LON LAT/LON - -
Output
data RS-485 - - - LAT/LON 4.15.3.4
Baud rate [bps] 115200 115200 115200 115200 4.15.3.4
Screen display LAT/LON LAT/LON LAT/LON LAT/LON 4.9.4
Display type MID MID MID GPS -
In this example, dimmer control of ID1 and that of ID2 are linked by the external dimmer unit and
dimmer control of ID3 and ID4 are not linked.
Dimmer control of ID3 and that of ID4 are linked by key operation and dimmer control of ID1 and that
of ID2 are not linked.
Procedure