Sony VPL-BW5 - Manual (Page 8)

4
VPL-BW5
2-4. Connection
<RS-232C 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.
Pins 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 there is no handshake normally performed by RS-232C.
2-5. Communication Procedure
2-5-1. Outline of Communication
All communication between CONTROLLER (PC, etc.) and DEVICE (PROJECTOR) is performed by the
command block format. Communication is started by the issue of a command at CONTROLLER and
ended when the return Data is sent to CONTROLLER after DEVICE receives the command.
CONTROLLER is prohibited from sending several commands at one time. This means that after CON-
TROLLER sends one command, it cannot send other commands until DEVICE returns the return Data.
DEVICE sends the return Data after processing the command. The time from when CONTROLLER
sends the command until the return Data is returned differs according to the contents of the command.
n
When Sircs Direct Command is sent, return Data may not be returned in some cases.
D-Sub 9 Pin
Shell = FG
3
2
7
8
6
5
1
4
9
D-Sub 25 Pin
1
2
3
4
5
6
7
8
20
22
Name
FG
TxD
RxD
RTS
CTS
DSR
SG
DCD
DTR
RI
Grounding for safety protection or cable shield
Transmission data
Reception data
Transmission request
Transmission permission
Data set ready
GND for signal
Data channel signal carrier detection
Data terminal ready
Calling display (Presence/absence of calling signal)