Proface APL3000B - Node Box PC User Manual
Page 38
Chapter 2 Specifications
2-17
Serial Mode Select SW
The factory setting is RS-232C. Only Switch No.1 is set to ON.
Switch
No.
Description
ON
OFF
RS-232C
RS-422
RS-485
(Data is not
automatically
controlled via
the RTS
signal.)
*1
*1 This setting determines whether or not the TXD output driver is automatically controlled via the RTS
signal.
RS-485
(Data is
automatically
controlled via
the RTS
signal.)
1
Changes
COM1’s
communication
method
RS-232C
RS-422/
RS-485
ON
OFF
OFF
OFF
2
Changes
COM1’s
communication
method
RS-422/
RS-485
RS-232C
OFF
ON
ON
ON
3
Changes
COM1’s
communication
method
RS-422/
RS-485
RS-232C
OFF
ON
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.
ON/OFF
6
Switches the
RX termination
resistance ON/
OFF
Inserts
termination
resistance of
220
Ω between
RXA and
RXB.
No
termination
OFF
ON
ON/OFF
ON/OFF
7
Switches the
shorting of TXA
and RXA ON or
OFF
Shorts TXA
and RXA (RS-
485 mode)
No shorting
(RS-422
mode)
OFF
OFF
ON
ON
8
Switches the
shorting of TXB
and RXB ON or
OFF
Shorts TXB
and RXB (RS-
485 mode)
No shorting
(RS-422
mode)
OFF
OFF
ON
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
OFF
ON
10
OFF
OFF
OFF
ON
Table 2) Serial Mode Select SW