NEC RS-232C manual Header block format fixed length, All

4.1 Header block format (fixed length)

Header

Message

Check code

Delimiter

SOH	Reserved	Destination	Source	Message	Message
	'0'			Type	Length
1st	2nd	3rd	4th	5th	6th -7th

1stbyte) SOH: Start of Header

ASCII SOH (01h)

2ndbyte) Reserved: Reserved for future extensions. On this monitor, it must be ASCII '0'(30h).

3rdbyte) 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	Monitor	Destination	Monitor	Destination	Monitor	Destination
ID	Address	ID	Address	ID	Address	ID	Address
1	41h(‘A’)	26	5Ah(‘Z’)	51	73h	76	8Ch
2	42h(‘B’)	27	5Bh	52	74h	77	8Dh
3	43h(‘C’)	28	5Ch	53	75h	78	8Eh
4	44h(‘D’)	29	5Dh	54	76h	79	8Fh
5	45h(‘E’)	30	5Eh	55	77h	80	90h
6	46h(‘F’)	31	5Fh	56	78h	81	91h
7	47h(‘G’)	32	60h	57	79h	82	92h
8	48h(‘H’)	33	61h	58	7Ah	83	93h
9	49h(‘I’)	34	62h	59	7Bh	84	94h
10	4Ah(‘J’)	35	63h	60	7Ch	85	95h
11	4Bh(‘K’)	36	64h	61	7Dh	86	96h
12	4Ch(‘L’)	37	65h	62	7Eh	87	97h
13	4Dh(‘M’)	38	66h	63	7Fh	88	98h
14	4Eh(‘N’)	39	67h	64	80h	89	99h
15	4Fh(‘O’)	40	68h	65	81h	90	9Ah
16	50h(‘P’)	41	69h	66	82h	91	9Bh
17	51h(‘Q’)	42	6Ah	67	83h	92	9Ch
18	52h(‘R’)	43	6Bh	68	84h	93	9Dh
19	53h(‘S’)	44	6Ch	69	85h	94	9Eh
20	54h(‘T’)	45	6Dh	70	86h	95	9Fh
21	55h(‘U’)	46	6Eh	71	87h	96	A0h
22	56h(‘V’)	47	6Fh	72	88h	97	A1h
23	57h(‘W’)	48	70h	73	89h	98	A2h
24	58h(‘X’)	49	71h	74	8Ah	99	A3h
25	59h(‘Y’)	50	72h	75	8Bh	100	A4h
ALL	2Ah(‘*’)

Group	Destination
ID	Address

A31h(‘1’)

B32h(‘2’)

C33h(‘3’)

Group	Destination
ID	Address

D34h(‘4’)

E35h(‘5’)

F36h(‘6’)

Group	Destination
ID	Address

G37h(‘7’)

H38h(‘8’)

I39h(‘9’)

Group	Destination
ID	Address
J	3Ah(‘:’)

Ex.) If you want to control a monitor that has the "ID No." as '1', specify a destination address

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