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48
Connecting to the RS-232C Port at the Host
Section 2-6
Setting the Front Switches
Connecting to a CS/CJ-
series Serial
Communications Unit
CS/CJ-series Rack-mounted Unit: CS1W-SCU21CJ-series: CJ1W-SCU41
(Port 2 is an RS-232C Port.)
Setting the Front Switches
Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
so that the values or symbols in the setting value window agree with the fol-
lowing.
Allocation DM Area Settings for CPU Unit
Settings are written from the Programming Device (a Programming Console
or CX-Programmer) directly into the allocated DM Area (PLC Setup) of the
CPU Unit. After the settings are written, they become effective by turning the
power ON, restarting the Unit, restarting the communications port, or execu-
tion of the STUP instruction.
RS-232C
Communications port 1
(RS-232C)
Communications port 2
(RS-232C/RS-422A)
I/O port selector switch
RS-422A
•
Unit # (SW3, SW4)
•
Communications condition setting (Pin 1)
Set this pin to OFF.
- Baud rate: 9,600 bps
- Parity: Even
- Xon/Xoff control: Not executed
- Communications method: Full duplex
- Stop bits: 2 stop bits
- Data length: 7 bits
•
I/O port selection (selector switch)
Set this to RS-232C.
•
CTS selection (Pins 2 and 3)
Set pin 2 or 3 to ON. (Set this always to 0V.)
When using communications port 2, set
these switches to 0.
To use communications port 1, turn ON pin 2.
To use communications port 2, turn ON pin 3.
Communications are executed in accordance with
the CPU Bus Unit system settings made at the PLC.
The initial values for the system settings are as
C
SCU21
RUN
ERC
SD1
RD1
RDY
ERH
SD2
RD2
No.
FE
10
CS1W-SCU21
CJ1W-SCU41
Set the unit number to 0 through F so
that it will not duplicate the numbers
used in other Units.
Set the unit number to 0 through F so that
it will not duplicate the numbers used in
other Units.
UNIT
No.
FE
D
C
B
A
9
8
7
6
5
4
32
10
UNIT
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...