Omron Programmable Terminals NT631 Setup Manual page 113

Connecting to the Host's RS-422A/485 Port
PLC CPU Unit with built-in Host
Series Link
CV500-CPU01-EV1
CV Series
(*3)
CV1000-CPU01-EV1
CV2000-CPU01-EV1
CVM1 CVM1-CPU01-EV2
(*3)
Series
CVM1-CPU11-EV2
CVM1-CPU21-EV2
SRM1 SRM1-C02-V1+CPM1-CIF11
96
CPU Units Connectable with
Host Link Units or
Expansion Communications
Board/Units
CV500-CPU01-EV1
CV1000-CPU01-EV1
CV2000-CPU01-EV1
CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2
*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).
Item
I/O port
Communications speed
Transfer code
Parity
1-to-1/1-to-N
Instruction level
Unit #
*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.
Host Link Unit or
Communications Board/
Unit
CV500-LK201
CV500-LK201
Setting at Host
RS-422A
Set the same speed as for the NT631/NT631C.
ASCII, 7 data bits, 2 stop bits
Even
(*2)
1-to-N
Level 1, 2, 3
00
Section 5-2
Connectable
to
CV500
CV1000
CV2000
CVM1
SRM1
(*1)