NEC RS-232C 用户手册

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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 6

“Message 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,



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,



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,



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,



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,

such as

“Save current settings”, “Get timing report”, “power control”, “Schedule”, etc. Refer to

Header

Message

Check code

Delimiter

OP code page

OP code

STX

ETX

Result

OP code

page

OP code

Type

Max value

Current Value

STX

MSB

LSB

MSB

LSB

ETX

OP code

page

OP code

Set Value

STX

MSB

LSB

ETX

Result

OP code

page

OP code

Type

Max value

Requested setting

Value

ETX

STX

MSB

LSB

MSB

LSB