NEC X981UHD External Control Codes - Page 86
STX 02h: Start of Message
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+01:00 : 00h (30h, 30h) +00:30 : 01h (30h, 31h) -00:30 : 02h (30h, 32h) -01:00 : 03h (30h, 33h) 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 written in result. Header Message SOH-'0'-'0'-Monitor ID- STX-'C'-'B'-'0'-'1'-'0'-'1'-ST-ETX 'B'-'0'-'A' Check code Delimiter 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 (10bytes) Message STX (02h): Start of Message 'C'-'B'-'0'-'1' (43h, 42h, 30h, 31h): Daylight Saving Setting Command '0'-'1' (30h, 31h): Write ST: Error Status No Error : 00h (30h, 30h) Error : 01h (30h, 31h) 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 (86/130)