Hatteland Display 26 inch - HD 26T21 MMC (Widescreen) - Manual (Page 17)

17
Serial/Ethernet Communication (SCOM) Interface
IND100084-14
"ETC" - Elapsed Time Counter Query
The unit features an elapsed time counter which counts the total number of hours that the unit has been operated.
No data shall be sent with this command. The unit will reply to this command with an ACK attention code. The DATA
field will be set to a 3 byte string, where the most significant byte is transmitted first.
The ETC has a limit on maximum 99999 hours (defined into 5 bytes, numbers 0 to 9 each), equivalent to 11 years. If
this number is reached, the ETC will stop counting, and the ETC command will always reply with maximum number of
hours (99999).
Example:
Command to Query ETC:
0x07 0xFF 0x45 0x54 0x43 0x00 0x1D
Acknowledge "0" + "0" + "0" + "5" + "8" = (combined "00058" or 58 hours):
0x06 0xFF 0x45 0x54 0x43 0x05 0x19 0x30 0x30 0x30 0x35 0x38 0x02
The ETC value has been hardcoded to 5 bytes, prefixed with "0".
"FHA" - Feature Header (Potentiometer)
Enable/Disable Feature Header. Not supported on STD units. This command controls the ADC for reading an external
potentiometer. When only ADC is set, the brilliance buttons in front will be deactivated. When set to ADC and touch
key, both brilliance buttons and potentiometer will work. The potentiometer will overwrite the brilliance buttons, and
the buttons are for adjusting from 0 to set value on potentiometer.
0x00 for only touch key (default)
0x99 for only ADC key (VR key)
0xFF for ADC and touch key
Example:
Command to use only touch key:
0x07 0xFF 0x46 0x48 0x41 0x01 0x29 0x00 0xFF