2-23
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 CS1W-SCB21 type (Both of port 1 and 2 are RS-232C ports)
For CS1W-SCB41 type (Port 1 is RS-232C port and Port 2 is RS-422A/485 port.)
(Serial Communication Board for CS-Series CPU Units with RS-232C port, RS-422A 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 (port 2 of the CS1W-SCB41 type).
*1 The communication speed should be set to the same value as that of the NB Unit.
Settings for front-side switches (For RS-422A)
When connecting to a CS-Series Serial Communication Board
DM Fixed Allocation Area (CH)
Write Value Setting
Port 1 Port 2
DM32000 DM32010 8000 Use Host Link
DM32001 DM32011 0000~000A (*1) Communication speed
DM32003 DM32013 0000 Unit No. 00
Port1 RS-232C
Terminating resistance switch
Set to ON (right position).
Two-wire/four-wire switch
RS-422A: [4] (four-wire)(right position)
RS-485: [2] (two-wire)(left position)
Port2
RS-422A/485
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