Sony FWD-S47H1 - Handbuch (Seite 19)

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GXD-L52H1
4. Request
The format when sending a request from a host to display equipment is described below.
Community
This is the same alphanumeric character as the community set in display equipment that sends a request.
Request
This is a request for display equipment.
Item No.
This is the item number to be treated for request.
Data Length
This is the length of data incident to a request. The maximum length is 128 bytes. The length of data is
“0” when no data exists.
Data
This is data incident to a request.
5. Response
The format when display equipment returns a response to the request from a host is described below.
Community
This contains the same alphanumeric character as a request. For a short header and short community, this
is embedded with 00h.
Response
This contains the result of a request.
Item No.
This is the item number to be treated for response.
Data Length
This is the length of data incident to a response. The maximum length is 128 bytes. The length of data is
“0” when no data exists.
Data
This is data incident to a response.
3-4. Requests and Responses
Requests and responses are described below.
1. Requests
Requests are only a GET request that gets the display information or state and a SET request that changes
the setting of display equipment.
Request Contents
SET (00h) Writes data in the register of display equipment.
GET (01h) Gets the installation information, equipment state, or setting values.
SET command:
Communication with the main microcomputer of display equipment can be done via a network by using
the protocol dedicated to this unit as well as an ID Talk protocol. Use a SET command in this case. (Also,
use a SET command when receiving information from the display equipment.)