Moxa MD-226X [46/56] Bri brightness minimum value

MD-224 Hardware Manual Display UART Commands

C-2

OSD Control Command

In this section, we describe the OSD control commands that can be used to configure the display. See the

following descriptions.

BRI (Brightness Minimum Value)

This command sets the brightness minimum value. The range is from 0x00 to 0x31 (0% - 100%). LEN=one

data byte.

Examples:

Command to set 30% brightness.

0x07 0xFF 0x42 0x52 0x49 0x01 0x1B 0x10 0xEF

BRL (Set LED Brightness of Touch Keypad)

This command sets the LED brightness value of the touch keypad. The range is from 0x00 to 0x31 (0% -

100%).The default brightness value of the touch keypad will be changed in the ratio of the panel backlight

brightness. You can send ?toquery the current value of the led brightness value. LEN=one data byte.

Examples:

Command to set 100% Brightness.

0x07 0xFF 0x42 0x52 0x4C 0x01 0x18 0x31 0xCE

BRM (Brightness Maximum Value)

This command sets the brightness maximum value. The range is from 0x00 to 0xFF (0% - 100%). LEN=one

data byte.

Examples:

Command to set 88% Brightness.

0x07 0xFF 0x42 0x52 0x4D 0x01 0x17 0xE0 0x1F

BRT (User Brightness Control)

This command sets the maximum brightness of the panel. The range is from 0x00 to 0xFF (0% - 100%). The

default value is 0xFF.

Note that whenever the MD-224 has been restarted, the BRT value will be reset to 100%. If the BRT value has

been changed (i.e., the BRT value does not equal 0xff), the ECDIS function will not be supported and the ECDIS

function keys will be disabled and turned off.

If the data and data checksum are incorrect, the reply data field is the current BRT value. LEN=one data byte.

Examples:

Command to set 40% Brightness.

0x07 0xFF 0x42 0x52 0x54 0x01 0x10 0x66 0x99

ACK set to 40% Brightness

0x06 0xFF 0x42 0x52 0x54 0x01 0x11 0x66 0x99

NAK default Brightness 100%

0x15 0xFF 0x42 0x52 0x54 0x01 0x02 0xFF 0x00