User Manual

7
 Serial Mode Select Switch
Switch
No.
Description ON OFF RS-232C RS-422 RS-485
1 Internal setting Reserved Reserved OFF
*1
*1 Be sure to keep the settings OFF.
OFF
*1
OFF
*1
2
Changes COM1’s
communicat ion
method
RS-422/RS-485 RS-232C
OFF ON ON
3
Changes COM1’s
communicat ion
method
RS-422/RS-485 RS-232C
OFF ON ON
4
Changes SD (TXD)
data’s output mode
SD (TXD) data
output is
controlled via the
RS (RTS) signal.
SD (TXD) data
output is NOT
controlled via the
RS (R TS) signal.
(normally output)
OFF
ON/
OFF
ON/
OFF
*2
*2 Set switches number 9 and 10 to ON when the SD (TXD) output driver is automatically controlled
with RS (RTS). Set switch number 4 to OFF.
Set switches number 9 and 10 to OFF when the SD (TXD) output driver is controlled with the RS
(RTS) signal. Set switch number 4 to ON.
5
Switches the SD
(TXD) termi nation
resista n ce ON/OFF
Inserts
termination
resistance of
220
Ω between
SDA and SDB .
No termination
OFF ON
ON/
OFF
*3
*3 If you use the termination resistance, base your settings on the connection specifications.
6
Switches the RD
(RXD) termination
resista n ce ON/OFF
Inserts
termination
resistance of
220
Ω between
RDA and RDB .
No termination
OFF ON
ON/
OFF
*3
7
Switches the
shorting of SDA and
RDA ON or OFF
Shorts SDA and
RDA
(RS-485 mod e)
No shorting
(RS-422 mode)
OFF OF F ON
8
Switches the
shorting of SDB and
RDB ON or OFF
Shorts SDB and
RDB
(RS-485 mod e)
No shorting
(RS-422 mode)
OFF OF F ON
9
RS (RTS) Automatic
control mode
(enabled only when
RS-485 mode)
The data is
automatically
controlled via the
RS (RTS) signal.
The data is not
automatically
controlled via the
RS (RTS) signal.
OFF OFF
ON/
OFF
*2
10 OFF OFF
ON/
OFF
*2