NEC LCD4620-2-IT LCD4020/4620/5220/6520, M40/M46 external control commands - Page 30

Note.) The maximum data length that can be returned from the monitor at a time is 32bytes. Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h). Message STX (02h): Start of Message 'C'-'3'-'1'-'6' (41h, 33h, 31h, 36h): Serial No. reply command Data(0)-Data(1)----Data(n):Serial Number  These data are encoded to ASCII characters strings. ETX (03h): End of Message Check code BCC: Block Check Code Refer to the section 4.5 "Check code" for a BCC calculation. Delimiter CR (0Dh): End of packet 12.2 Model Name Read This command is used in order to read the Model Name. 1) The controller requests the monitor to read Model Name. Header Message SOH-'0'-Monitor ID-'0'-'A'-'0'-'6' STX-'C'-'2'-'1'-'7'-ETX Check code Delimiter BCC CR Header SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to get Model Name. 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 Message STX (02h): Start of Message 'C'-'2'-'1'-'7' (43h, 32h, ETX (03h): End of Message 31h, 37h): Model Name command Check code BCC: Block Check Code Refer to the section 4.5 "Check code" for a BCC calculation. Delimiter CR (0Dh): End of packet 2) The monitor replies the model name data to the controller. Header Message SOH-'0'-'0'-Monitor ID-'B'-N-N STX-'C'-'3'-'1'-'7'-Data(0) -Data(1)---- -Data(n)-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". N-N: Message length Note.) The maximum data length that can be returned from the monitor at a time is 32bytes. Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h). Message STX (02h): Start of Message 'C'-'3'-'1'-'7' (43h, 33h, 31h, 37h): Model Name reply Command Data(0) -Data(1)----Data(n):Model name  These data are encoded to ASCII characters strings. (30/40)