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Allocation DM area word
Port 1
m
m+1
m+2
m+3
Connecting to a CJ-series Serial Communications Unit
CJ-series Rack-mounted Type: CJ1W-SCU21/41-V1
Setting the Front Switches
Set the unit number for the Serial Communications Unit using the rotary switch on the front of
the Unit. Follow the procedure below use a flat-head screwdriver (−) to set the number and
sign in the setting display window.
Port 2 on the CJ1W-SCU41-V1 is an RS-232C port.
CJ1W-SCU21-V1
Setting CPU Unit Allocation DM Area Words
Settings can be directly written to the Allocation DM Area (System Setup Area) by using a
Programming Device, such as a Programming Console or the CX-Programmer. After the
settings are written, the settings will become valid by performing any of the following: turning
on the power supply again, restarting the Unit, restarting the communications port, or
executing a STUP instruction.
Writing
Value
Port 2
m+10
8000
m+11
0000
0007
m+12
0000
m+13
0000
• Unit Number Setting
Set a number from 0 to
F that does not overlap
another unit.
• Port 1
RS-232C
• Port 2
RS-232C
m = DM 30000 + 100 × unit number (word address)
Host link mode, 2 stop bits, even parity, data length
7 bits
Communications speed 9600 bps.
Communications speed 19200 bps.
Transmit delay time 0 ms.
No CTS control Unit No.0 for host link
CJ1W-SCU41-V1
12
Settings
• Unit Number Setting
Set a number from 0 to
F that does not overlap
another unit.
• Port 2
RS-232C
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