MD-119 HW Manual
Display UART Command
C-7
POT (Potentiometer Control)
The unit may allow the backlight to be controlled by the local control (potentiometer/keypad) mounted on the
front of the unit, by the remote control or by the combination of the two. This command provides means to
enable/disable the local control. LEN = one data byte.
0x00
Disables the local control. Backlight controlled only by the remote control.
0xFF
Enables the local control. Backlight is controlled by both the remote control and the local control.
(Default)
Note: In this setting, with the BRT command at 100%, the local control will have full dimming range.
This is the initial setting when a unit is powered 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 resulting control setting. 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 control setting.
SNB (Serial Number Query)
This query is sent to the unit in order to identify the unit serial number. No data shall be sent with this query.
The display will reply to this command with an ACK attention code. The DATA field will be set to an
text string to indicate the specified Serial Number, e.g: “12345”.
Examples:
Command Display Serial Number
0x07
0xFF
0x53
0x4E
0x42
0x00
0x16
Acknowledge Type/Model Number “12345”:
0x06
0xFF
0x53
0x4E
0x42
0x05
0x12
0x31
0x32
0x33
0x34
0x35
0x00
TYP (Type/Model/Number Query)
This query is sent to the display in order to identify the unit type by its model number / part number. No data
shall be sent with this query.
The display will reply to this command with an ACK attention code. The DATA field will be set to an
text string to indicate the specified Type/Model Number, e.g: “MD-119-TN”.
Examples:
Command Type/Model Number
0x07
0xFF
0x54
0x59
0x50
0x00
0xFC
Acknowledge Type/Model Number “MD-119-TN”:
0x06
0xFF
0x54
0x59
0x50
0x0C
0xF1
0x4D
0x44
0x2D
0x31
0x31
0x39
0x2D
0x54
0x4E
0x20
0x20
0x20
0x77