Proface APL3000B - Node Box PC Uživatelský manuál Strana 38

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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
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 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
*2
6
Switches the
RX termination
resistance ON/
OFF
Inserts
termination
resistance of
220 between
RXA and
RXB.
No
termination
OFF ON ON/OFF
*2
ON/OFF
*2
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
*1
(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
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