2-25
2 Installing the NB Unit and Connecting Peripheral Devices
NB-series Programmable Terminals Setup Manual(V107)
2-4 Serial Communication Connection
2
2-4-3 Settings for each Unit
For CJ1W-SCU21 type (Both of port 1 and 2 are RS-232C ports)
For CJ1W-SCU31 type (Both of port 1 and 2 are RS-422A/485 ports) (Unit version1.3)
For CJ1W-SCU41 type (Port 1 is RS-422A/485 port and Port 2 is RS-232C port.)
Settings for the DM Fixed Allocation Area of the CPU Unit
Write settings directly to the [DM Fixed Allocation Area] of the CPU Unit (System Settings Area) with a
peripheral tool (programming console or CX-Programmer). After finishing the write-in, the settings can
be activated through any of the methods of reconnecting the power supply, restarting the Unit,
reactivating the communication port, executing the STUP instruction.
The followings are the Channel Nos. and settings of the DM Fixed Allocation Area.
It is the same when using RS-232C, RS-422A.
m = DM30000 + 100 × Unit No. (CH)
*1 The communication speed should be set to the same value as that of the NB Unit.
Settings for the front-side Switches (Take CJ1W-SCU41 as an example)
When connecting to a CJ1-Series Serial Communication Unit
DM Fixed Allocation Area (CH)
Write Value Setting
Port 1 Port 2
m m+10 8000 Use Host Link
m+1 m+11 0000~000A (*1) Communication speed
m+3 m+13 0000 Unit No. 00
Display indicators
CJ1W-SCU41
Port 2
RS-232C
Port 1
RS-422A/485
Unit number setting switch
Set a value between 0 and F that is not the same as
these used by other Units in the system.
Two-wire/four-wire switch (WIRE)
RS-422A: [4](four-wire)(right position)
RS-485: [2](two-wire)(left position)
Terminating resistance switch (TERM)
WWW.NNC.IR
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