Header Block Format (Fixed Length) - NEC MultiSync V423 Manual

4.1 Header block format (fixed length)

Reserved
SOH
'0'
st nd
1 2
st
1 byte) SOH: Start of Header
ASCII SOH (01h)
nd
2 byte) Reserved: Reserved for future extensions.
On this monitor, it must be ASCII '0'(30h).
rd
3 byte) Destination: Destination equipment ID. (Receiver)
Specify a commands receiver's address.
The controller sets the "MONITOR ID" or "GROUP ID" of the monitor controlled in here.
On the reply, the monitor sets '0' (30h), always.
"MONITOR ID", "GROUP ID" to "Destination Address" conversion table is as follows,
Monitor Destination
ID Address
1 41h('A')
2 42h('B')
3 43h('C')
4 44h('D')
5 45h('E')
6 46h('F')
7 47h('G')
8 48h('H')
9 49h('I')
10 4Ah('J')
11 4Bh('K')
12 4Ch('L')
13 4Dh('M')
14 4Eh('N')
15 4Fh('O')
16 50h('P')
17 51h('Q')
18 52h('R')
19 53h('S')
20 54h('T')
21 55h('U')
22 56h('V')
23 57h('W')
24 58h('X')
25 59h('Y')
ALL 2Ah('*')
Group Destination
ID Address
A 31h('1')
B 32h('2')
C 33h('3')
Ex.) If you want to control a monitor that has the "ID No." as '1', specify a destination address
Destination Source
rd th
3 4
Monitor Destination
ID Address
26 5Ah('Z')
27 5Bh
28 5Ch
29 5Dh
30 5Eh
31 5Fh
32 60h
33 61h
34 62h
35 63h
36 64h
37 65h
38 66h
39 67h
40 68h
41 69h
42 6Ah
43 6Bh
44 6Ch
45 6Dh
46 6Eh
47 6Fh
48 70h
49 71h
50 72h
Group Destination
ID Address
D 34h('4')
E 35h('5')
F 36h('6')
Header Message
Message Message
Type Length
th
5 6
Monitor Destination
ID Address
51 73h
52 74h
53 75h
54 76h
55 77h
56 78h
57 79h
58 7Ah
59 7Bh
60 7Ch
61 7Dh
62 7Eh
63 7Fh
64 80h
65 81h
66 82h
67 83h
68 84h
69 85h
70 86h
71 87h
72 88h
73 89h
74 8Ah
75 8Bh
Group Destination
ID Address
G 37h('7')
H 38h('8')
I 39h('9')
(7/72)
Check code Delimiter
th th
-7
Monitor
ID
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Group
ID
J
Destination
Address
8Ch
8Dh
8Eh
8Fh
90h
91h
92h
93h
94h
95h
96h
97h
98h
99h
9Ah
9Bh
9Ch
9Dh
9Eh
9Fh
A0h
A1h
A2h
A3h
A4h
Destination
Address
3Ah(':')