NEC UN552S External Controls - Page 102

20. Input Name 20.1 Input Name Read This command is used in order to read the setting of Input Name. 1) The controller requests the monitor to reply Input Name setting. Header SOH-'0'-Monitor ID- '0'-'A'-'0'-'8' Message STX-'C'-'A'-'0'-'4'-'0'-'0'-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 (8bytes) Message STX (02h): Start of Message 'C'-'A'-'0'-'4' (43h, 41h, 30h, 34h): Input Name 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 Input Name to the controller. Header Message SOH-'0'-'0'-Monitor ID'B'-LN(H)-LN(L) STX-'C'-'B'-'0'-'4'-'0'-'0'Data(0)-Data(1)-Data(2)- --- -Data(n)-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', replying monitor's ID is '1'. 'B' (42h): Message type is "Command reply". LN(H)-LN(L): Message length (byte length), from STX to ETX Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h). Message STX (02h): Start of Message 'C'-'B'-'0'-'4' (43h, 42h, 30h, 34h): Input Name command reply '0'-'0' (30h, 30h): Read Data(n) : Input name *n = Max 14  The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h). Ex.) For example when receiving Data(n) of 35h 36h 34h 37h 34h 31h Step1: Input Name data is encoded as character code. Example: 35h 36h 34h 37h 34h 31h -> '5'-'6'-'4'-'7'-'4'-'1' Step2: Decode pairs of ASCII characters to hexadecimal values. Example: '5'-'6'-'4'-'7'-'4'-'1' -> 56h 47h 41h (102/145)