14
Serial/Ethernet Communication (SCOM) Interface
IND100084-14
"BRT" - User 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 (255 in value) will indicate
maximum brightness. Intermediate values will control brightness over the range from minimum to maximum
luminance. LEN = one data byte.
After any power cycle the BRT will be set to 100%.
If the data checksum is valid and the brightness was set, the unit will reply to this command with an ACK attention
code. The DATA field in the reply shall indicate the resulting brightness control setting. If an invalid checksum was
received and the message was not Broadcast and RS-485, the unit will reply with an NAK attention code. The DATA
field in the reply will indicate the current brightness control setting.
Example:
If BRT is 100%, the user can adjust the brightness from 0-100%. If the BRT is set to 60%, the visual brightness is set
to 60%. The user can adjust the brightness from 0-100% within the 60% set by BRT. If the user sets the
potensiometer to half, the visual brightness will be 30% (half of 60%). If BRT is set back to 100%, the visual
brightness will be 50% (half of 100%).
Command to set 60% Brightness:
0x07
0xFF
0x42
0x52
0x54
0x01
0x10
0x99
0x66
Acknowledge was set to 60% Brightness:
0x06
0xFF
0x42
0x52
0x54
0x01
0x11
0x99
0x66
Negative Acknowledge 40% Brightness:
0x15
0xFF
0x42
0x52
0x54
0x01
0x02
0x66
0x99
"BRU" - Glass Display Control™ (GDC) Brilliance Button
This command shall be sent to the unit to command the user brightness control setting. The brightness value shall be
sent as 1 byte in the DATA field. A setting of 0x00 shall indicate off. A setting of 0xFF shall indicate maximum
brightness.
Example:
Command to set 60% Brightness:
0x07
0xFF
0x42
0x52
0x55
0x01
0x0F
0x99
0x66
