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2-2. Reply
Item Number
Item
ACK
NAK
3. RS-232C
3-1. Connection
Communication is enabled by the use of a D-Sub 9 Pin cross (reverse) cable.
The pin assignment of D-Sub 9 Pin and D-Sub 25 Pin is as follows.
D-Sub 9 Pin
D-Sub 25 Pin
Shell = FG
1
3
2
2
3
7
4
8
5
6
6
5
7
1
8
4
20
9
22
Pin numbers not indicated as D-Sub 25 Pin are not used.
Assured cable length: 15 m (However, assurance may not be applicable for some cables.)
The software for controlling the projector from a PC is intended for performing transmission and recep-
tion for only the TxD and RxD lines.
Therefore the handshake normally performed by RS-232C is not necessary.
3-2. Communication Specifi cations
. Full duplex communication channels (Flow control is not performed.)
. Start-stop synchronism system
. Baud rate: 38.4 kbps (bits per second)
. The bit confi guration is defi ned as follows.
1 START Bit + 8 DATA Bits + 1 PARITY Bit + 1 STOP Bit
START
D0
D1
BIT
(LSB)
EVEN Parity ...........Total number of "1"s from D0 to D7 is an even number. 8 0
...........Total number of "1"s from D0 to D7 is an odd number. 8 1
VPL-EW130
<Table 3>
Data
Upper byte
Complete
Select Error
FG
Grounding for safety protection or cable shield
TxD
Transmission data
RxD
Reception data
RTS
Transmission request
CTS
Transmission permission
DSR
Data set ready
SG
GND for signal
DCD
Data channel signal carrier detection
DTR
Data terminal ready
RI
Calling display (Presence/absence of calling signal)
D2
D3
D4
Data
Lower byte
00h
00h
01h
05h
Name
D5
D6
D7
PARITY STOP
(MSB)
(EVEN)
BIT
7
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