NEC MultiSync V461, Руководство по связи

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4
）
Set Parameter reply
The monitor replies with this message for a confirmation of the
“
Set parameter message
”
.
Message format of the
“
Set parameter reply
”
is as follows,

Refer to section 5.4
“
Set parameter reply
”
for more details.
5
）
Command
“
Command message
”
format depends on each command.
Usually, this
“
command message
”
is used for some non-slider controls and some special operations,
such as
“
Save current settings
”
,
“
Get timing report
”
,
“
power control
”
,
“
Schedule
”
, etc. Refer to
section 5.5
“
Commands message
”
for more details.
6
）
Command reply
The monitor replies to a query from the controller.
“
Command reply message
”
format depends on each command.
Refer to section 5.5
“
Commands message
”
for more details.
4.5 Check code
Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH.
D
n+1
= D
1
XOR D
2
XOR D
3
XOR ,,, D
n
XOR: Exclusive OR
Following is an example of a Check code (BCC) calculation.
Result
OP code
page
OP code Type Max value
Requested setting
Value
ETX
STX
Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB
Header Message
Check code
Delimiter
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
SOH D
0
Reserved D
1
Destination D
2
Source D
3
Type D
4
Length(H) D
5
Length(L) D
6
STX D
7
Data D
8
| |
| |
ETX D
n
Check code D
n+1
P P P P P P P P
Header Message
SOH Reserved
Destination
Address
Source
Address
Message
type
Message length STX
OP code
page
OP code Set Value ETX
Check
code
(BCC)
Delimiter
01 30 41 30 45 30 41 02 30 30 31 30 30 30 36 34 03 77 0D
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
D
9
D
10
D
11
D
12
D
13
D
14
D
15
D
16
D
17
D
18