NEC UN552S External Controls - Page 126

24. Security Enable 24.1 Security Enable Read This command is used in order to read the Security Enable. 1) The controller requests the monitor to read Security Enable Header SOH-'0'-Monitor ID- '0'-'A'-'0'-'8' Message STX-'C'-'A'-'0'-'C'-'0'-'2'-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 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'-'C' (43h, 41h, 30h, 43h): Security password Command '0'-'2' (30h, 32h): Enable 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 Security Enable to the controller. Header SOH-'0'-'0'-Monitor ID- 'B'-'0'-'A' Message STX-'C'-'B'-'0'-'C'-'0'-'2'-EN-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', 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'-'C'-'0'-'2' (43h, 42h, 30h, 41h, 30h, 32h): Get Security Enable Disable Reply EN: Status 00h: Disable 01h: Enable 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 (126/145)