Panasonic PT-EZ770Z Service Manual page 25

SECTION 1 SERVICE INFORMATION
4. 1. 5. Cable specification
l When connected to a computer
4. 1. 6. Basic format
Transmission from the computer starts with STX, then the ID, command, parameter, and ETX are sent in this order.
Add parameters according to the details of control.
1. Basic control command (without parameter)
Start
(STX)
1 byte 4 byte
2. Basic control command (with parameters)
Start
(STX)
1 byte 4 byte
3. Basic control command (with sub command)
Start
(STX)
1 byte 4 byte
Sign Parameter
1 byte 5 byte
4. Operation
Specifies the method of processing the value specified by parameters.
Code Description
= Sets the value specified by the parameter
_(underbar) Adds the value specified by the parameter to the current value.
5. Sign
Specifies the method of processing the value specified by parameters.
Code Description
+ The value specified by the parameter is a positive value or 0 (zero).
– The value specified by the parameter is a negative value.
6. Parameters
Specify the setting or adjustment value by right justification (0 is not suppressed).
For example, when the setting value is "1", set it as "00001".
7. ID of the basic control command
This projector will respond to the computer only if the sent ID coincides with the projector ID.
8. Response (Callback) of the basic control command
In the period when the command can be accepted.
Differs according to each command.
In the period when commands cannot be accepted.
Hexadecimal 02h
Character
In case of the parameter error or REMOTE2 effective.
Hexadecimal 02h
Character
Projector
(<SERIAL IN> terminal)
Separator
ID
(semicolon)
1 byte
Separator
ID
(semicolon)
1 byte
Separator
ID
(semicolon)
1 byte
End
(ETX)
1 byte
45h 52h
E R
45h 52h
E R
1 NC NC 1
2 2
3 3
4 NC NC 4
Computer
5 5
(DTE specifications)
6 NC NC 6
7 7
8 8
NC NC
9 9
End
Command
(ETX)
3 byte 1 byte
Separator
Command
(colon)
3 byte 1 byte
Separator
Command
(colon)
3 byte 1 byte
34h 30h 31h
4 0 1
34h 30h 32h
4 0 2
INF-17
End
Parameter
(ETX)
Undefined length 1 byte
Parameter Operation
Undefined length 1 byte
03h
03h