NEC X754HB, Manual

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20. Power Save Mode
20.1 Power Save Mode Read
This command is used in order to read the Power Save Mode.
1) The controller requests the monitor to read Power Save Mode
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'A'-'0'-'B'-0'-'0'-ETX BCC CR
Header
SOH (01h): Start of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID of 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'-'8'(30h,38h): Message length (8byte)
Message
STX (02h): Start of Message
'C'-'A'-'0'-'B' (43h, 41h, 30h, 42h): Power Save Mode command
'0'-'0' (30h, 30h): Read
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 Power Save Mode to the controller.
Header Message Check code Delimiter
SOH-'0'-'0'-Monitor ID-
'B'-'0'-'A'
STX-'C'-'B'-'0'-'B'-'0'-'0'-MODE-ETX BCC CR
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’, replying monitor’s ID is ‘1’.
'B' (42h): Message type is "Command reply".
'0'-'A'(30h,41h): Message length (10byte)
Message
STX (02h): Start of Message
'C'-'B'-'0'-'B' (43h, 42h, 30h, 42h): Power Save Mode Reply
'0'-'0' (30h, 30h): Read
MODE: POWER SAVE MODE
00h (30h, 30h): AUTO POWER SAVE
01h (30h, 31h): AUTO STANDBY
02h (30h, 32h): POWER SAVE OFF
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.3 “Check code” for a BCC calculation.