Sony FWD-S47H1 - Handbuch (Seite 18)

3-2
GXD-L52H1
3-3. Packet Structure
The packet structure of ID Talk is described below.
Packet structure
1. Header
The header is constituted by two bytes consisting of a version (8 bits) and category (8 bits).
Header structure
Version
Indicates the version number of an ID Talk protocol.
This version is fi xed to 02h (version 2).
Category
Contains the category number of display equipment to be controlled. A category number is confi rmed on
the display equipment side. A request is ignored when a different category number is contained.
Code Category
10h Information Display
2. Community
A request is executed when community coincides with the community set in display equipment. Commu-
nity consists of four (upper- or lower-case) alphanumeric characters. “SONY” is a factory-setting value.
The set character can be changed on the Web page.
Community packet
3. Command
The format of a request packet and response packet is described below.
Command packet
Community
(4)
Command
(4)
Data
(n)
Header
(2)
0
0
Version (8) Category (8)
1 (Bit position)
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
0
0
Community (32)
1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
2 3
7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
(Bit position)
0
0
Item No(16) Data Length(8)
Request/Response(8)
1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
2 3
7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
(Bit position)