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Connecting to the Host’s RS-422A/485 Port Section 5-2
The NT link (1:1) method cannot be used using RS-485. To use the NT link
(1:1) method, connect by RS-422A.
NT link connection using RS-422A/485 is not possible with CPM1.
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 the 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 or CQM1H
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.
Setting the DIP Switches on a C200HX/HG/HE(-Z)E Communications
Board
Set the switches on a C200HX/HG/HE(-Z)E Communications Board as fol-
lows.
Switch 1: (4-wire = RS-422A)
Switch 2: ON (terminator ON = terminating resistance enabled)
Host Model Word # Setting Setting Contents
Port A of C200HX/HG/HE(-Z)E
*1
DM6555 4000 Use NT link (1:1)
Por t 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)
4
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