NEC E437Q External Controls - Page 26

7. Power control procedure 7.1 Power status read 1) The controller requests the monitor to reply a current power status. Header SOH-'0'-Monitor ID'0'-'A'-'0'-'6' Message STX-'0'-'1'-'D'-'6'-ETX Check code BCC Delimiter CR Header SOH (01h): Start of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID from which you want to get status. Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'A' (41h): Message Type is "Command". '0'-'6' (30h, 36h): Message length is 6 bytes. Message STX (02h): Start of Message '0'-'1'-'D'-'6': Get power status command. 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 returns with the current power status. Header Message SOH-'0'-'0'-Monitor ID'B'-'1'-'2' STX-'0'-'2'-'0'-'0'-'D'-'6'-'0'-'0''0'-'0'-'0'-'4'-'0'-'0'-'0'-'1'-ETX Check code BCC Delimiter 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', the replying Monitor ID is '1'. 'B' (42h): Message Type is "Command reply". '1'-'2' (31h, 32h): Message length is 18 bytes. Message STX (02h):Start of Message '0'-'2' (30h, 32h): Reserved data '0'-'0' (30h, 30h): Result code 00: No Error. 01: Unsupported. 'D'-'6'(44h, 36h): Display power mode code '0'-'0' (30h, 30h): Parameter type code is "Set parameter". '0'-'0'-'0'-'4' (30h, 30h, 30h, 34h): Power mode is 4 types. '0'-'0'-'0'-'1' (30h, 30h, 30h, 31h): Current power mode 0001: ON 0002: No mean 0003: power save 0004: OFF (same as IR power off) ETX (03h): End of Message Check code BCC: Block Check Code (26/47)