Omron Programmable Terminals NT631C - Manual (Page 113)

96
Connecting to the Host’s RS-422A/485 Port Section 5-2
*1
This CPU Unit is for a Duplex-CPU Unit System. The CS1W-SCB41(-V1)
Serial Communications Board cannot be used.
*2
Use a CPM2C-CN111 or CS1W-CN114/118 Connecting Cable, CPM1-
CIF01 RS-232C Adapter, or CPM1-CIF11 RS-422A Adapter to connect.
*3
CPU Units of CVM1/CV-series PLCs without the suffix -EV @ cannot be
connected.
The host link method cannot be used when an NT631/NT631C is connected
using RS-485. To use the host link method, connect by RS-422A.
Settings at the Host
When using the RS-422A host link method, the settings shown below must be
made at the host (depending on the Unit, some of these settings may not be
necessary, or settings not shown here may be necessary).
*1
Set the host link communications speed at 9600 bps or 19200 bps with the
Comm. Speed memory switch at the NT631/NT631C. For details, refer to 6-
7-2 Setting the Host Link Method (page 155).
*2
The 1-to-N setting enables BCC (Block Check Character). It is not actually
possible to connect more than one NT631/NT631C in a single host link.
The setting methods for each type of Unit are described in the following.
CV Series
(*3)
CV500-CPU01-EV1 CV500-CPU01-EV1 CV500-LK201 CV500
CV1000-CPU01-EV1 CV1000-CPU01-EV1 CV1000
CV2000-CPU01-EV1 CV2000-CPU01-EV1 CV2000
CVM1
Series
(*3)
CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2
CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2
CV500-LK201 CVM1
SRM1 SRM1-C02-V1+CPM1-CIF11 SRM1
PLC
Series
CPU Unit with built-in Host
Link
CPU Units Connectable with
Host Link Units or
Expansion Communications
Board/Units
Host Link Unit or
Communications Board/
Unit
Connectable
to
Item Setting at Host
I/O port RS-422A
Communications speed
Set the same speed as for the NT631/NT631C.
(*1)
Transfer code ASCII, 7 data bits, 2 stop bits
Parity Even
1-to-1/1-to-N
1-to-N
(*2)
Instruction level Level 1, 2, 3
Unit # 00