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Connecting to the Host’s RS-422A/485 Port Section 5-2
*3
CPU Units of CVM1/CV-series PLCs without the suffix -EV@ cannot be
connected.
The NT Link (1:1) method cannot be used using RS-485. To use the NT Link
(1:1) method, connect by RS-422A.
The 1:1 NT Link connection using RS-422A/485 is not possible with the
CPM1, CPM2A, or CPM2C.
Settings at the Host
The setting methods for each type of Unit are described in the following.
• Connecting to a CVM1/CV-series (-EV@) CPU Units
• CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1
• CVM1-CPU01-EV2/CVM1-CPU11-EV2/CVM1-CPU21-EV2
PLC Setup
When connecting to a CVM1/CV-series CPU Unit by the NT Link (1:1)
method, no particular settings are required at the PLC Setup.
Setting the Front Switches
• Connecting to a C-series C200HX/HG/HE(-Z)E
PLC Setup Area Settings
Write the PLC Setup area (data memory) settings directly from a Program-
ming Device (e.g. CX-Programmer) in accordance with the host model.
*1
RS-422A port of the Communications Board
*2
RS-422A port of the Serial Communications Board
For details on operations relating to the PLC Setup area, refer to the manual
for the PLC you are using.
Host Model Word # Setting Setting Contents
Port A of C200HX/HG/HE(-Z)E
*1
DM6555 4000 Use NT Link (1:1)
Port 2 of CQM1H
*2
DM6550 4000
• Host link communications method selection
(selector switch)
Set this to RS-422A.
• Terminator setting (DIP SW6)
Set this switch to ON.
(Set terminator ON.)
I/O port selector switch
RS-422A
RS-232C
• Communications type setting (DIP SW3)
Set this switch to ON.
(for communications by NT Link)