NEC RS-232C User Manual
Page 5
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Message format of the
“Set parameter” is as follows,
Refer to section 5.3
“Set parameter” for more details.
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
OP code
page
OP code
Set Value
STX
Hi
Lo
Hi
Lo
MSB
LSB
ETX
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