S P E C F I L E
Portable LCD Projector
PT-LB75
Serial connector
The serial connector complies with
Pin assignments and signal names
69
1 5
No. Signal name | Description | No. Signal name | Signal name | ||
1 | – | NC | 6 | – | NC |
2 | TXD | Send data | 7 | CTS | Connected internally |
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3 | RXD | Receive data | 8 | RTS | Connected internally |
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4 | – | Connected internally | 9 | – | NC |
5 | GND | Ground |
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*Effective when connected to a PC having proper functions.
Communication conditions (factory setting)
Signal level | ||
Synchronization method | ||
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Baud rate | 9,600 bps | |
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Parity | None | |
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Character length | 8 | bits |
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Stop bit | 1 | bit |
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X parameter | None | |
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S parameter | None | |
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Basic format
Transmission from the computer begins with STX, then the ID, command, parameter, and ETX are sent in this order. Add parameters according to the details of control.
STX
C1 C2 C3
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P1 P2 P3 P4
ETX
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Start |
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| Colon | Parameter | End | ||||||
(1 byte) | Command (1 byte) | (1 byte) | |||||||||
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(Control and/or query commands)
CAUTION
It may not be possible to send or receive commands for about 10 to 60 seconds when the lamp is first turned on. If this occurs, wait for 60 seconds, then try sending or receiving again. When sending multiple commands, be sure to wait for at least 0.5 second after receiving a response from the projector before sending the next command. Additional time is sometimes required for response due to processing inside the projector. Set the
NOTE:
If a wrong command is received, the projector will send an ER401 command to the computer.
When sending commands without parameters, a colon (:) is not necessary.
Cable specifications
Projector | PC (DTE) |
1 | NC | NC | 1 |
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2 |
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3 |
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4 | NC | NC | 4 |
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5 |
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6 | DSR | NC | 6 |
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7 |
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8 |
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9 | NC | NC | 9 |
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As of October 2008 |
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