Digital Electronics Corporation PL-3700T Series Manual de instalación - Página 7

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Serial Mode Select Switch
Switch
Description
No.
1
Internal setting
Changes COM1's
2
communication
method
Changes COM1's
3
communication
method
Changes SD (TXD)
4
data's output mode
Switches the SD
5
(TXD) termination
resistance ON/OFF
Switches the RD
6
(RXD) termination
resistance ON/OFF
Switches the
7
shorting of SDA and
RDA ON or OFF
Switches the
8
shorting of SDB and
RDB ON or OFF
RS (RTS) Automatic
9
control mode
(enabled only when
10
RS-485 mode)
*1 Be sure to keep the settings, "OFF".
*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.
*3 If you use the termination resistance, base your settings on the connection specifications.
ON
Reserved
RS-422/RS-485
RS-422/RS-485
SD (TXD) data
output is
controlled via the
RS (RTS) signal.
Inserts
termination
resistance of
220Ω between
SDA and SDB.
Inserts
termination
resistance of
220Ω between
RDA and RDB.
Shorts SDA and
RDA
(RS-485 mode)
Shorts SDB and
RDB
(RS-485 mode)
The data is
automatically
controlled via the
RS (RTS) signal.
7
OFF
Reserved
OFF
RS-232C
OFF
RS-232C
OFF
SD (TXD) data
output is NOT
controlled via the
OFF
RS (RTS) signal.
(normally output)
No termination
OFF
No termination
OFF
No shorting
OFF
(RS-422 mode)
No shorting
OFF
(RS-422 mode)
The data is not
OFF
automatically
controlled via the
OFF
RS (RTS) signal.
RS-232C RS-422 RS-485
*1
*1
OFF
ON
ON
ON/
OFF
ON
ON
OFF
OFF
OFF
OFF
*1
OFF
ON
ON
ON/
*2
OFF
ON/
OFF
*3
ON/
*3
OFF
ON
ON
ON/
*2
OFF
ON/
*2
OFF