5 rs-232c cable connection, 6 mode setting, Rs-232c cable connection – Toshiba SX 2000 User Manual
Page 40: Mode setting
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1.3 Computer link mode
1.3.5
RS-232C cable connection
Cable connection examples show as below.
• Use shielded twisted-pair cable for data communication suited to RS-232C
standard. The cable shield should be connected to single -point ground.
Master
computer
RXD
TXD
DTR
SG
DSR
RTS
CTS
Shielded twisted-pair cable
15 m max.
S2T
(RS-232C)
1
SG
2
RXD
3
TXD
4
5
SG
6
5 Vdc
7
RTS
8
CTS
9
5 Vdc
S2T, D-Sub 9-pin female connector is provided. Use D-Sub 9-pin male connector
as cable side.
RTS signal (pin 7) of the S2T is ON while power on.
CTS signal (pin 8) of the S2T has no mean on Communication control.
1.3.6
Mode setting
The operation mode of the S2T’s link port is selected by the special resister provided
on the S2T CPU module.
The operation mode is internally set at the timing of power-up. Setting changes while
power on is not effective.
To select the computer link mode, the special resister SW069 set to "0". (SW069=0)
At the factory, the computer link mode is selected.
S2T
resister
Name
Function
SW069
link port operation mode
0: computer link mode
2: Free ASCII mode
6F8C0926
23