NEC LCD Monitor Manual 

Also see for LCD Monitor: Control guide

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NEC LCD Monitor Manual  Manual pdf 46 page image

(46/137)8. Asset Data read and writeMultiSync P403/ P463 /P553 have the area for to store user’s asset data of up to 64bytes.8.1 Asset Data Read Request and replyThis command is used in order to read Asset Data.1) The controller requests the monitor to reply with Asset data.Header Message Check code DelimiterSOH-'0'-Monitor ID-'0'-'A'-'0'-'A'STX-'C'-'0'-'0'-'B'-'0'-'0'-'2'-'0'-ETXBCC CRHeaderSOH (01h): Start of Header'0' (30h): ReservedMonitor ID: Specify the Monitor ID from which you want to get data.Ex.) If Monitor ID is '1', specify 'A'.'0' (30h): Message sender is the controller.'A' (41h): Message type is "Command".'0'-'A' (30h, 41h): Message length is 10 bytes.MessageSTX (02h): Start of Message'C'-'0'-'0'-'B' (43h, 30h, 30h, 42h): Asset read request command.'0'-'0' (30h, 30h): Offset data from top of the Asset data.At first set 00h: Read data from the top of Asset data area.'2'-'0' (32h, 30h): Read out data length is 32bytes.Secondly set 20h: Read data from the 32bytes offset point in the Asset data area.Maximum readout length is 32bytes at a time.ETX (03h): End of MessageCheck codeBCC: Block Check CodeRefer to the section 4.5 “Check code” for a BCC calculation.DelimiterCR (0Dh): End of packet2) The monitor replies Asset data to the controller.Header Message Check code DelimiterSOH-'0'-'0'-Monitor ID-'B'-N-NSTX-'C'-'1'-'0'-'B'-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.) This length includes STX and ETX.MessageSTX (02h): Start of Message'C'-'1'-'0'-'B' (43h, 31h, 30h, 42h): Asset read reply commandData(0) – Data(N): Retuned Asset dataEx.) When Data(n) is 1234h, replying data is (31h 32h, 33h, 34h).ETX (03h): End of MessageCheck codeBCC: Block Check Code