Message Block Format - NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS Manual

"Monitor ID" to "Destination Address" conversion table is as follows,
Monitor ID
1
2
3
4
5
6
7
8
9
10
11
12
13
ALL
Ex.) If you want to control a monitor that has the "ID No." as '1', specify a destination address
'A'(41h). If you want to control all of the monitors which are connected by a daisy chain, specify
a destination address ' '(2Ah).
th
4 byte) Source: Source equipment ID. (Sender)
Specify a sender address.
The controller must be '0' (30h).
th
5 byte) Message Type: (Case sensitive.)
Refer to section 4.2 "Message block format" for more details.
ASCII 'A' (41h): Command.
ASCII 'B' (42h): Command reply.
ASCII 'C' (43h): Get current parameter from a monitor.
ASCII 'D' (44h): "Get parameter" reply.
ASCII 'E' (45h): Set parameter.
ASCII 'F' (46h): "Set parameter" reply.
th th
6 -7 bytes) Message Length:
Specify the length of the message (that follows the header) from STX to ETX.
This length includes STX and ETX.
The byte data must be encoded to ASCII characters.
Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h).
The byte data 0Bh must be encoded to ASCII characters '0' and 'B' (30h and 42h).

4.2 Message block format

"Message block format" is allied to the "Message Type" in the "Header".
Refer to the section 6 "Message format" for more detail.
Destination Monitor ID
Address (ASCII)
'A'(41h)
14
'B'(42h)
15
'C'(43h)
16
'D'(44h)
17
'E'(45h)
18
'F'(46h)
19
'G'(47h)
20
'H'(48h)
21
'I'(49h)
22
'J'(4Ah)
23
'K'(4Bh)
24
'L'(4Ch)
25
'M'(4Dh)
26
'*'(2Ah)
Header
(3/40)
Destination
Address (ASCII)
'N'(4Eh)
'O'(4Fh)
'P'(50h)
'Q'(51h)
'R'(52h)
'S'(53h)
'T'(54h)
'U'(55h)
'V'(56h)
'W'(57h)
'X'(58h)
'Y'(59h)
'Z'(5Ah)
Message Check code Delimiter