Asset Data Read And Write; Asset Data Read Request And Reply - NEC LCD4020-BK-AV - 40IN LCD 1200:1 1366X768 60HZ Dvi-d 8MS Manual

Refer to the section 4.5 "Check code" for a BCC calculation.
Delimiter
CR (0Dh): End of packet

8. Asset Data read and write

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
SOH-'0'-Monitor ID-'0'-'A'-'0'-'A'
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID from which you want to get data.
'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.
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.
SOH-'0'-'0'-Monitor ID-'B'-N-N
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
'B' (42h): Message type is "Command reply"
N-N: Message length
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.
STX-'C'-'0'-'0'-'B'-'0'-'0'-'2'-'0'-ETX
Ex.) If Monitor ID is '1', specify 'A'.
Maximum readout length is 32bytes at a time.
Header
Ex.) When this byte is set to 'A', the replying Monitor ID is '1'.
Ex.) The byte data 20h is encoded to ASCII characters '2' and '0' (32h and 30h).
Note.) This length includes STX and ETX.
Message
Message
STX-'C'-'1'-'0'-'B'-
Data(0)-Data(1)---Data(N)-ETX
(17/40)
Check code Delimiter
BCC CR
Check code Delimiter
BCC CR