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1. Serial communications Basics
returned data = Data[0]....Data[3]
value = Data[0]*256
3
+ Data[1]*256
2
+ Data[2]*256 + Data[3].
1.3 Communication settings
Baud rate
Defines the speed of the data transfer. The baud rate can be set using the menu structure.
Consult the Owner’s manual of the projector on how to change the baud rate setting.
Data Bits
Eight data bits are used for each character of the data transfer.
Parity
There is no parity bit used to perform error checking.
Stop Bits
One stop bit is used to define the end of a character.
1.4 Hardware
Overview
• Female D9–pin connector labelled “RS232 IN” used to connect the projecto
r with the computer.
Pin out of the D9 connector:
Pin Name Full Name
1
CD Carrier Detect
2 RxD Received Data
3 TxD Transmitted Data
4 DTR Data Terminal Ready
5
GND Signal Ground
6
DSR Data Set Ready
7
RTS Request To Send
8
CTS Clear To Send
9 RI Ring Indicator
• Standard serial Cable
- order number R9827560 (cable length = 15m )
- order number R9827570 (cable length = 30m )
R5976884 RLM SERIES 04/04/2006
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