NEC MultiSync V422 Control Manual page 8

'A'(41h). If you want to control all of the monitors which are connected by a daisy chain, specify
a destination address ' '(2Ah).
th
4 byte) Source: Source equipment ID. (Sender)
Specify a sender address.
The controller must be '0' (30h).
On the reply, the monitor sets the own MONITOR ID in here.
th
5 byte) Message Type: (Case sensitive.)
Refer to section 4.2 "Message block format" for more details.
ASCII 'A' (41h): Command.
ASCII 'B' (42h): Command reply.
ASCII 'C' (43h): Get current parameter from a monitor.
ASCII 'D' (44h): "Get parameter" reply.
ASCII 'E' (45h): Set parameter.
ASCII 'F' (46h): "Set parameter" reply.
th th
6 -7 bytes) Message Length:
Specify the length of the message (that follows the header) from STX to ETX.
This length includes STX and ETX.
The byte data must be encoded to ASCII characters.
Ex.) The byte data 3Ah must be encoded to ASCII characters '3' and 'A' (33h and 41h).
The byte data 0Bh must be encoded to ASCII characters '0' and 'B' (30h and 42h).
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