Power Control - NEC MultiSync C431 User Manual

7.2 Power control

1) The controller requests the monitor to control monitor power.
Header
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'C'
Header
SOH (01h): Start of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID which you want to change a setting.
Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller.
'A' (41h): Message type is "Command".
'0'-'C (30h, 43h): Message length is 12 bytes.
Message
STX (02h): Start of Message
'C'-'2'-'0'-'3'-'D'-'6' (43h, 32h, 30h, 33h, 44h, 36h): power control command
'0'-'0'-'0'-'1' (30h, 30h, 30h, 31h): Power mode
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.3 "Check code" for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies a data for confirmation.
Header
SOH-'0'-'0'-Monitor ID-
'B'-'0'-'E'
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.
'B' (42h): Message type is "Command reply".
'N'-'N': Message length
Note.) The maximum data length that can be written to the monitor at a time is
32bytes.
Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h).
Message
STX (02h): Start of Message
'0'-'0' (30h, 30h): Result code. No error.
'C'-'2','0'-'3'-'D'-'6' (43h, 32h, 30h, 33h, 44h, 36h): power control reply command

The monitor replies same as power control command to the controller.
'0'-'0'-'0'-'1' (30h, 30h, 30h, 31h): Power mode
ETX (03h): End of Message
Message
STX-'C'-'2'-'0'-'3'-'D'-'6'-
'0'-'0'-'0'-'1'-ETX
0001: ON
0002, 0003: Do not set.
0004: OFF (same as the power off by IR)
STX-'0'-'0'-'C'-'2'-'0'-'3'-'D'-'6'-
'0'-'0'-'0'-'1'-ETX
0001: ON
0002, 0003: Do not set.
0004: OFF (same as the power off by IR)
(39/104)
Check
code
BCC
Message
Delimiter
CR
Check
Delimiter
code
BCC CR