Panasonic PT-VZ570 Service Manual page 20

SECTION 1 SERVICE INFORMATION
4. 1. 5. 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
9. Attention
- If a command is transmitted after the lamp starts illuminating, there may be a delay in response or the command may not be
executed. Try sending or receiving any command after 60 seconds.
- When transmitting multiple commands, be sure to wait until 0.5 seconds has elapsed after receiving the response from the
projector before sending the next command.
- It might take time by the time the response returns because the command is processed in the projector.
Set the time-out to 10 seconds or longer.
Separator
ID
(semicolon)
1 byte
Separator
ID
(semicolon)
1 byte
Separator
ID
(semicolon)
1 byte
End
(ETX)
1 byte
45h 52h
R
E
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
INF-14
End
Parameter
(ETX)
Undefined length 1 byte
Parameter Operation
Undefined length 1 byte
03h