NEC UN552S External Controls - Page 81

12.2 Weekend Write This command is used in order to write the setting of Weekend. 1) The controller requests the monitor to write the setting of Weekend. Header SOH-'0'-Monitor ID- '0'-'A'-'0'-'A' Message STX-'C'-'A'-'1'-'A'-'0'-'1'- WEEK-ETX Check code BCC Delimiter CR Header SOH (01h): Start of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID of which you want to change the setting. Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'A' (41h): Message type is "Command". '0'-'A'(31h, 41h): Message length Message STX (02h): Start of Message 'C'-'A'-'1'-'A' (43h, 41h, 31h, 41h): Weekend command '0'-'1' (30h, 30h): write request WEEK: Weekend '0'-'0'(30h, 30h): None bit assignment of a day of the week. bit0: Monday bit1: Tuesday bit2: Wednesday bit3: Thursday bit4: Friday bit5: Saturday bit6: Sunday Example: Weekend setting is "Saturday" and "Sunday". '2'-'0' OR '4'-'0' = '6'-'0' 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 Message SOH-'0'-'0'-Monitor ID- STX-'C'-'B'-'1'-'A'-'0'-'1'-ST- 'B'-'0'-'C' WEEK-ETX 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', the replying Monitor ID is '1'. 'B' (42h): Message type is "Command reply". '0'-'C'(30h, 43h): Message length Message STX (02h): Start of Message 'C'-'B'-'1'-'A' (43h, 33h, 31h, 41h): Weekend reply command '0'-'1' (30h, 30h): write request ST: Status '0'-'0'(30h, 30h): No error (81/145)