Set Parameter" Reply - NEC MultiSync C431 User Manual

5.4 "Set parameter" reply

STX Result OP code
Hi Lo Hi
st nd rd
1 2 -3 4
The Monitor echoes back the parameter and status of the requested operation code.
st
1 byte) STX: Start of Message
ASCII STX (02h)
nd rd
2 -3 bytes) Result code
ASCII '0''0' (30h, 30h): No Error.
ASCII '0''1' (30h, 31h): Unsupported operation with this monitor or unsupported operation
under current condition.
th th
4 -5 bytes) OP code page: Echoes back the Operation code page for confirmation.
Reply data from the monitor is encoded to ASCII characters.
Ex.) OP code page 02h ->
Refer to Operation code table.
th th
6 -7 bytes) OP code: Echoes back the Operation code for confirmation.
Reply data from the monitor is encoded to ASCII characters.
Ex.) OP code 1Ah -> OP code (Hi) = ASCII '1' (31h)
Refer to Operation code table
th th
8 -9 bytes) Type: Operation type code
ASCII '0''0' (30h, 30h): Set parameter
ASCII '0''1' (30h, 31h): Momentary
Like Auto Setup function, that automatically changes the parameter.
th th
10 -13 bytes) Max. value: Maximum value that monitor can accept. (16bits)
Reply data from the monitor is encoded to ASCII characters.
Ex.) '0''1''2''3' means 0123h (291)
th th
14 -17 bytes) Requested setting Value: Echoes back the parameter for confirmation. (16bits)
Reply data from the monitor is encoded to ASCII characters.
Ex.) '0''1''2''3' means 0123h (291)
th
18 byte) ETX: End of Message
ASCII ETX (03h)
OP code
page
Lo Hi Lo Hi
th th th th
-5 6 -7
OP code page = ASCII '0' and '2' (30h and 32h)
OP code (Lo) = ASCII 'A' (41h)
(17/104)
Type Max value
Lo MSB
th th th th
8 -9 10 -13
Requested setting
Value
LSB MSB LSB
th th
14 -17
ETX
th
18