Specifies the command request. Status requests
are also considered as commands.
Returns the result to the request sent from the host.
Indicates that the request was invalid or
could not be completed.
Indicates that the request was
Defines the format of the information included in the
Indicates a monitor command.
Indicates a monitor command for monitors with
Specifies the length (n) of the subsequent Data field (a
2-byte hexadecimal value).
The maximum value that can be specified is 499
Example of normal communication
Example of response
Example of error communication
If there is an error in the request, or if the request results
in an error, "NG" is returned as the response.
In this case, the Item no. field contains the item number
of the original request packet and the Error Code field
contains a 1-byte category and a 1-byte error code.
Refer to "SDCP error codes" (page 7) for the list of
categories and error codes.
Set Data (n byte)
Get Data (n byte)
Support for broadcast communication
The broadcast communication via UDP is supported for
controlling more than one monitor from a single
controller. In this configuration, monitors do not return
any response to commands.
SDCP error codes
The following table lists the SDCP error codes (not all
of the error codes are implemented.) For description of
the errors, refer to the subsequent paragraphs.
SDCP error codes
Check Sum Error
Other Communication Error 50h
This type of error indicates a communication error
between the controller and the main control
microcomputer of the display.
Check Sum Error: A check sum error occurred at the
main control microcomputer.
Other Communication Error: Another type of
communication error occurred.
Error Code (16)
Command Block Format