NEC GT2000 - Manual (Page 26)

E-26
PC Control
Interface
An RS-232C cable enables you to use your PC as a controller for your projector.
* RS-232C (Straight cable)
* Baud rate: ................................ 9600 bps
* Data length: ............................. 8 bits
* Parity: ...................................... Odd parity
* Stop bit: ................................... 1 bit
* Communications procedure: ... Full duplex
Signal Name
Signal Ground
Receive Data
Transmit Data
Clear To Send
Request To Send
-
Not Connected
Function
Ground
Data reception
Data transmission
Reception interrupt
Transmission interrupt
Used iside the projector (Should always be left open)
Not used
Pin No.
9, 15
6
7
12
8
1, 2
3-5, 10, 11, 13, 14
I/O
-
I
O
I
O
-
-
5 1 2 3 4
10 6 7 8 9
15 11 12 13 14
* Command specification code: This code specifies whether the
command is a single control command or a multiple control
command.
A single control command (C0H) is valid for only the projector
specified by the unit address.
A multiple control command (C1H) is valid for all projectors
which receive the command, regardless of the unit address. Note
that only projectors in agreement with the unit address will
return an ACK.
* Unit address: This code specifies the ID of the projector (0-64).
You can select the [Settings Menu]->[Projector ID] under the
main menu and specify the ID of projector.
For a single projector, the ID should be set at 0.
8 bits 8 bits 8 bits 8 bits 8 bits • • • • • • • • •
CKS Command
specification code
Unit
address
Function
number
Data
length
Data
* Function number: The function's identification code.
* Data length: This specifies the number of bytes of data (not
including CKS).
* Data: The parameters attached to the function.
* CKS (check sum): The lower-order 8 bits of the calculation
results from the first byte (i.e., the command specification code)
to the byte in front of CKS.
REMOTE 2/PC Connector
Control Data Format
EMOTE 1
B 1 AUDIO
REMOTE 2/PC
EXT-CTL REMOTE
OUTPUT
REMOTE
INPUT NO R
To RS232C
RS232C straight cable
Signal source