21
Serial/Ethernet Communication (SCOM) Interface
IND100084-14
"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 is valid for the brilliance buttons if no external
potentiometer is connected. 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.
Example:
Command Set Local Control Disable (0x00):
0x07
0xFF
0x50
0x4F
0x54
0x01
0x05
0xFF
0x00
Acknowledge Local Control Disable (0xFF):
0x06
0xFF
0x50
0x4F
0x54
0x01
0x06
0xFF
0x00
"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 unit will reply to this command with an ACK attention code. The DATA field will be set to an ASCII text string to
indicate the specified Serial Number, e.g: "12345". Note that the length of Serial Number is not limited to 5 characters.
It will decrease or increase in length depending on actual Serial Number stored in the unit.
Example:
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
