Moxa MD-119-X1 [40/44] Osd control command

MD-119 HW Manual Display UART Command

C-6

OSD Control Command

This section describes the OSD control commands that can be used to configure the display. See the following

tables.

BLI (Brightness Control)

This command is sent to the unit to command the backlight brightness control setting. The brightness value

shall be sent as one byte in the DATA field. A setting of 0x00 will indicate off. A setting of 0xFF will indicate

maximum brightness. Intermediate values will control brightness over the range from minimum to

maximum luminance.

LEN = one data byte.

Examples:

Command Brightness= 153

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

Acknowledge Brightness= 153

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

Negative Acknowledge Brightness= 102

0x15 0xFF 0x42 0x52 0x54 0x01 0x02 0x66 0x99

DST (Display State)

This command is sent to the unit to control the unit on/off or query the on/off state of the unit.

LEN = one data byte.

0x00

Turn the display off

0xFF

Turn the display on

0x3F

“?” - Query the state of the unit. The returned DATA field will indicate the state.

0x00 = Unit is off. 0xFF = Display is on.

If the data checksum is valid, the unit will reply to this command with an ACK attention code. The DATA field will

indicate the unit sate. If an invalid data checksum was received and the message was not broadcast and RS-485,

the unit will reply with a NAK attention code and the current state.

MAN (Manufacturer ID Code)

This command is sent to the unit to request Manufacturer ID. No data shall be sent with this command.

The unit will reply to this command with an ACK attention code. The DATA field identifies the manufacturer in a

text string.

Examples:

Query Manufacturer ID:

0x07 0xFF 0x4D 0x41 0x4E 0x00 0x1D

Acknowledge Manufacturer ID “MOXA”:

0x06 0xFF 0x4D 0x41 0x4E 0x0C 0x12 0x4D 0x4F 0x58 0x41

0x20 0x20 0x20 0x20 0x20 0x20 0x20 0x20 0xCA