Header Block Format (Fixed Length) - NEC MultiSync C431 User Manual

4.1 Header block format (fixed length)

SOH Reserved
'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,
Monito Destinatio
r n
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')
Destination Source
rd th
3 4
Monito Destinatio
r n Address
ID
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')
(8/104)
Header Message Check code
Message Message
Type Length
th th
5 6 -7
Monito Destinatio
r n Address
ID
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')
Delimiter
th
Monito Destinatio
r n Address
ID
76 8Ch
77 8Dh
78 8Eh
79 8Fh
80 90h
81 91h
82 92h
83 93h
84 94h
85 95h
86 96h
87 97h
88 98h
89 99h
90 9Ah
91 9Bh
92 9Ch
93 9Dh
94 9Eh
95 9Fh
96 A0h
97 A1h
98 A2h
99 A3h
100 A4h
Group Destination
ID Address
J 3Ah(':')