Proface APL3000B - Node Box PC User Manual
Page 37
PS-3000B Series Hardware Manual
2-14
Switch
Number
Description
ON
OFF
RS-232C
RS-422
RS-485
1
Changes COM2’s
communication
method
RS-232C
RS-422 / RS-485 ON
OFF
*1
*1
Be sure to keep the settings, “OFF” for RS-422 or RS-485.
OFF
2
Changes COM2’s
communication
method
RS-422 / RS-485 RS-232C
OFF
ON
ON
3
Changes COM2’s
communication
method
RS-422 / RS-485 RS-232C
OFF
ON
ON
4
Changes TX data’s
output mode
TX data output is
controlled via the
RTS signal.
TX data output is
NOT controlled
via the RTS
signal. (normally
output)
OFF
ON/OFF
ON/OFF
5
Switches the TX
termination
resistance ON/OFF
Inserts
termination
resistance of
220
Ω between
TXA and TXB.
No termination
OFF
ON
ON/OFF
*2
*2
If you use the termination resistance, base your settings on the connection specifications.
6
Switches the RX
termination
resistance ON/OFF
Inserts
termination
resistance of
220
Ω between
RXA and RXB.
No termination
OFF
ON
ON/OFF
7
Switches the
shorting of TXA
and RXA ON/OFF
Shorts TXA and
RXA.
(RS-485 mode)
No shorting
(RS-422 mode)
OFF
OFF
ON
8
Switches the
shorting of TXB
and RXB ON/OFF
Shorts TXB and
RXB.
(RS-485 mode)
No shorting
(RS-422 mode)
OFF
OFF
ON
9
RTS Automatic
control mode
(enabled only when
RS-485 mode)
The data is
automatically
controlled via the
RTS signal.
The data is not
automatically
controlled via the
RTS signal.
OFF
OFF
ON/OFF
*3
*3
To control TX output driver via RTS automatically, set ON. Be sure to set SW No.4 OFF.
To control TX output driver via RTS signal, set OFF. Be sure to set SW No.4 ON.
10
OFF
OFF
ON/OFF
Table2) Serial Mode Select Switches