NEC MultiSync C431 User Manual

Also see for MultiSync C431: User manual User manual Installation guide

Contents

NEC MultiSync C431 User Manual Manual pdf 69 page image

(69/104)14. Serial No. & Model Name Read14.1 Serial No. ReadThis command is used in order to read a serial number.1) The controller requests the monitor to read a serial number.Header Message CheckcodeDelimiterSOH-'0'-Monitor ID-'0'-'A'-'0'-'6'STX-'C'-'2'-'1'-'6'-ETX BCC CRHeaderSOH (01h): Start of Header'0' (30h): ReservedMonitor 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 lengthMessageSTX (02h): Start of Message'C'-'2'-'1'-'6' (43h, 32h, 31h, 36h): Serial No. commandETX (03h): End of MessageCheck codeBCC: Block Check CodeRefer to the section 4.3 “Check code” for a BCC calculation.DelimiterCR (0Dh): End of packet2) The monitor replies the serial No. data to the controller.Header Message Check code DelimiterSOH-'0'-'0'-Monitor ID-'B'-N-NSTX-'C'-'3'-'1'-'6'-Data(0)-Data(1)---Data(n)-ETXBCC CRHeaderSOH (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 lengthNote.) The maximum data length that can be returned from the monitor at a time is32bytes.Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h).MessageSTX (02h): Start of Message'C'-'3'-'1'-'6' (41h, 33h, 31h, 36h): Serial No. reply commandData(0)-Data(1)----Data(n):Serial Number The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h).Ex.) Foe example when receiveing Serial Number data 33h 31h 33h 32h 33h 33h 33h 34hStep1: Serial Number data is encoded as character string.Example:33h 31h 33h 32h 33h 33h 33h 34h -> '3','1','3','2','3','3','3','4'Step2: Decode pairs of ASCII characters to hexadecimal values.Example:'3','1','3','2','3','3','3','4' -> 31h 32h 33h 34hStep3: Byte data represents the ASCII string data.Example:31h 32h 33h 34h -> "1234"Result: Serial Number is "1234".