Hatteland Display 19 inch - JH 19T14 MMC - Manual (Page 13)

13
Serial Communication (SCOM) Interface
Communication Interface
IND100084-12
"DL?" - Query available ECDIS packages
This command is ask the unit to return there are how many packets in ECDIS table available for download. Each
calibration mode is separate. If we at ‘Calibration VGA’ mode, we will get the available packets number at VGA table,
and also on ‘Calibration DVI’. But there is no available packet at ‘No Calibration’.
Packets = Size of Table / 32 bytes per packet
Example:
Command to read package #3:
0x07 0xFF 0x44 0x4C 0x3F 0x00 0x2A
Acknowledge: DL? 3 available packets:
0x06 0xFF 0x44 0x4C 0x3F 0x01 0x2A 0x03 0xFC
“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. NOTE: This command is available from version SW100066-1G09 and upwards.
0x00 Turn the unit off
0xFF Turn the unit on
0x3F
“?” - Query the state of the unit. The returned DATA field will indicate the state.
0x00 = Unit is off. 0xFF = Unit 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.
Example:
Query Display State:
0x07 0xFF 0x44 0x53 0x54 0x01 0x0D 0x3F 0xC0
Acknowledge Display state, unit is on:
0x06 0xFF 0x44 0x53 0x54 0x01 0x0E 0xFF 0x00
Acknowledge Display state, unit is off:
0x06 0xFF 0x44 0x53 0x54 0x01 0x0E 0x00 0xFF