NEC X754HB, Руководство пользователя

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4.2 Message block format
“Message block format” is allied to the “Message Type” in the “Header”.
Refer to the section 4.1 “Header block format” for more detail.
1)Get current parameter
The controller sends this message when you want to get the status of the monitor.
For the status that you want to get, specify the “OP code page” and “OP code”,
refer to “Appendix A. Operation code table”.
“Message format” of the “Get current parameter” is as follows,
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Refer to section 5.1 “Get current parameter from a monitor.” for more details.
2)Get Parameter reply
The monitor will reply with the status of the requested item specified by the controller
in the “Get parameter message”.
“Message format” of the “Get parameter reply” is as follows,
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Refer to section 5.2 “Get parameter reply” for more details.
3)Set parameter
The controller sends this message to change a setting of the monitor.
Message format of the “Set parameter” is as follows,
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Refer to section 5.3 “Set parameter” for more details.
4)Set Parameter reply
The monitor replies with this message for a confirmation of the “Set parameter message”.
Message format of the “Set parameter reply” is as follows,
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Refer to section 5.4 “Set parameter reply” for more details.
5)Command
“Command message” format depends on each command.
Usually, this “command message” is used for some non-slider controls and some special operations,
Header Message Check code Delimiter
STX OP code
page
OP code ETX
Hi Lo Hi Lo
STX Result OP code
page
OP code Type Max value Current Value ETX
Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB
STX OP code
page
OP code Set Value ETX
Hi Lo Hi Lo MSB LSB
STX Result OP code
page
OP code Type Max value Requested setting
Value
ETX
Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB