Sony VPL-PX20 / VPL-PX30 / VPL-VW10HT Service Manual ▷ View online
2
VPL-PX20/PX30
VPL-VW10HT
2. Communication Specifications
<RS-232C Communication Signal>
. Full duplex communication channels (Flow control not performed.)
. Start-stop synchronism system
. Baud rate: 38.4 kbps (bits per second)
. The bit configuration is defined as follows.
. Start-stop synchronism system
. Baud rate: 38.4 kbps (bits per second)
. The bit configuration is defined as follows.
1 START Bit
+ 8 DATA Bits + 1 PARITY Bit + 1 STOP Bit
EVEN Parity.....Total number of “1”s from D0 to D7 is an even number.
D4
D5
D6
D7
(MSB)
(LSB)
(EVEN)
BIT
PARITY STOP
BIT
START
D3
D2
D1
D0
3
VPL-PX20/PX30
VPL-VW10HT
3. Command Block Format
The code from B0 to B (n)
+ 2 as described below are transmitted.
1
B0
Start Code
2
SENDER (To) Index
9
Bm
+
1
Check SUM
0
Bm
+
2
End Code
B1
Peripheral Index
B2
B3
B4
B5
3
SENDER (From) Index
B6
Peripheral Index
B7
B8
B9
B10
6
7
Data Length
Total Data Length
B16
Data Length 2
(00 h)
Data Length 3
(00
_
7 Fh)
4
COMMAND
B11
Cmd1
B12
Cmd2
B13
Cmd3
B15
B16
8
Data
Bn
Data (n)
Bm
Data (n
+
1, 2, 3, 4...)
Bn = B16
+
1
Bm = B16
+
Total Data Length
5
Check Data Length
Data Length 1
(B16
+
2)
(02
_
81 h)
B14
Group Index
Device Index
Group Index
Device Index
4
VPL-PX20/PX30
VPL-VW10HT
4. Data of Code
1
1
1
1
1
Start Condition
2
2
2
2
2
INDEX Header
/
*--
RECEIVER INDEX
--
*/
/
*--
SENDER INDEX
--
*/
/
*--
Command
--
*/
Note: CMD1 and CMD2 are assigned with different commands for each unit. Consequently,
there is no compatibility of commands between units. For details of the commands, refer
to the respective list of commands for the units. Since there is no index function of this
unit, the receiver INDEX will be ignored even if the command is designated.
3
3
3
3
3
Sub Data Size
Note: Error when 82 to FF hex codes are included.
4
4
4
4
4
Data Size 2
Note: Error when 01 to FF hex codes are included.
B1
B2
B3
B4
B5
PERIPHERAL INDEX
GROUP INDEX UPPER BYTE
GROUP INDEX LOWER BYTE
DEVICE INDEX UPPER BYTE
DEVICE INDEX LOWER BYTE
01
00
01
00
01
01: Projector
Group Index = 0001 hex
Device Index = 0001 hex
B6
B7
B8
B9
B10
PERIPHERAL INDEX
GROUP INDEX UPPER BYTE
GROUP INDEX LOWER BYTE
DEVICE INDEX UPPER BYTE
DEVICE INDEX LOWER BYTE
03
00
01
00
01 - 63
01: Controller
Group Index = 0001 hex
Device Index = 0001 - 0063 hex
B15
Data Length 2
00 0:
Fixed
B14
Data Length 1
02 81
(B16
+
2) hex Data Size
Bn
B0
NAME
Start Code
DATE
(hex)
A5
NOTE
Indicates the first packet
Projector All
LCD Projector All
VPL-PX20, VPL-PX30, VPL-VW10HT only
B11
B12
B13
CMD1
CMD2
CMD3
00
80
90
Refer to attached
Refer to attached
5
VPL-PX20/PX30
VPL-VW10HT
5
5
5
5
5
Data Size 3
Note: Error when 80 to FF hex codes are included.
6
6
6
6
6
Data
Bn = B16
+ 1
Bm = B16
+ Total Data Length
7
7
7
7
7
Check SUM
XOR is the exclusive OR.
It is as follows when calculated by 1 bit.
Taking A XOR B = C;
Taking A XOR B = C;
A
B
C
0
0
0
1
0
1
0
1
1
1
1
0
<Example of Calculation>
When 0XA5 (165) and 0XA5 (165) are calculated by XOR;
A5
10100101
(165)
A5
10100101
(165)
Answer
00000000
(0)
When 0XA5 (165) and 0X5A (90) are calculated by XOR;
Answer
Answer
A5
10100101
(165)
5A
01011010
(90)
Answer
11111111
(255)
8
8
8
8
8
End Condition
B16
Data Length 3
00 7F
Size of
6
Bn - Bm Data
XX
No Data in some cases
Bm
+
1
Check Sum
XX
Check sum of Data from
2
to
6
(Calculate the XOR of the Data from
2
to
6
)
Bm
+
2
END Code
5A
Indicates the last packet
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