NEC LCD4620-2-IT LCD4020/4620/5220/6520, M40/M46 external control commands - Page 29

70: Standby-power digital +3.3V abnormality 71: Standby-power +5V abnormality 72: Main-power panel +12V abnormality 73: Main-power +2.5V abnormality 74: Main-power +1.8V abnormality 75: Standby-power analog +3.3V abnormality 76: Main-power analog +3.3V abnormality 77: Main-power digital +3.3V abnormality 78: Power-good signal +4.2V abnormality 80: Cooling fan-1 abnormality 81: Cooling fan-2 abnormality 82: Cooling fan-3 abnormality 90: Inverter abnormality  The byte data 70 is encoded as ASCII characters '7' and '0' (37h and 30h). 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. Serial No. & Model Name Read 12.1 Serial No. Read This command is used in order to read a serial number. 1) The controller requests the monitor to read a serial number. Header Message Check code SOH-'0'-Monitor ID-'0'-'A'-'0'-'6' STX-'C'-'2'-'1'-'6'-ETX BCC Delimiter CR Header SOH (01h): Start Of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID which you want to get serial number. 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'-'6' (43h, 32h, 31h, 36h): Serial No. command 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 2) The monitor replies the serial No. data to the controller. Header SOH-'0'-'0'-Monitor ID-'B'-N-N Message STX-'C'-'3'-'1'-'6'Data(0)-Data(1)---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', the replying Monitor ID is '1'. 'B' (42h): Message type is "Command reply". N-N: Message length (29/40)