NEC RS-232C manual Asset Data read and write, Asset Data Read Request and reply

8. Asset Data read and write

MultiSync P402 /P462 /P552 /P702 /V422 /V462 /V551 /V651 /V322 /V652 /V552 /X461S /X551S /X401S /X463UN /X551UN /V463 /V423 have the area for to store user’s asset data of up to 64bytes.

8.1 Asset Data Read Request and reply

This command is used in order to read Asset Data.

1) The controller requests the monitor to reply with Asset data.

Header	Message	Check code	Delimiter
SOH-'0'-Monitor ID-'0'-'A'-'0'-'A'	STX-'C'-'0'-'0'-'B'-'0'-'0'-'2'-'0'-ETX	BCC	CR

Header

SOH (01h): Start Of Header

'0' (30h): Reserved

Monitor 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.

Message

STX (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 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 Asset data to the controller.

	Header		Message	Check code	Delimiter
	SOH-'0'-'0'-Monitor ID-'B'-N-N		STX-'C'-'1'-'0'-'B'-	BCC	CR
			Data(0)-Data(1)---Data(N)-ETX
	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
	Ex.) The byte data 20h is encoded to ASCII characters '2' and '0' (32h and 30h).
	Note.) This length includes STX and ETX.
Message
	STX (02h): Start of Message
	'C'-'1'-'0'-'B'	(43h, 31h, 30h, 42h): Asset read reply command

Data(0) – Data(N): Retuned Asset data

ETX (03h): End of Message

Check code

BCC: Block Check Code

Refer to the section 4.5 “Check code” for a BCC calculation.

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