4-1 1:1 Host Connection 
•  Connecting to Simplified Communications Units 
When using a CPM2C1-CIF21 Simplified Communications Unit, connect it to the RS-232C 
port. 
 
  
RS-232C port 
 
 
4-1-2  Unit Setting Methods 
• Host Settings 
The methods for setting each Unit are as follows: 
 
Connecting C Series, C200HS, C200HX/HG/HE(-Z), CQM1, CPM2A, CPM2C, or 
CQM1H PLCs  
 
•  PLC Setup Area 
 
Write the settings directly from the Programming Device (CX-Programmer, etc.) to the PLC 
Setup Area (in DM Area) according to the host type and port used. 
 
Using RS-232C  
Host type  Address   Write value Settings 
Built-in RS-232C port of C200HS, C200HX/HG/HE(-Z), 
CPM1A, CPM2A, CPM2C, CQM1, or CQM1H  
DM 6645 
Port A of C200HX/HG/HE(-Z) (See note 1.)
 
Port 1 of CQM1H (See note 2.) 
DM 6555 
Port B of C200HX/HG/HE(-Z) (See note 1.)  DM 6550 
4000  Uses 1:1 NT 
Link 
Note  1.  RS-232C port of Communications Board.  
  2.  RS-232C port of Serial Communications Board.  
 
Using RS-422A  
Host type  Address  Write value Settings 
Port A of C200HX/HG/HE(-Z)  
(See note 1.) 
DM 6555  4000 
Port 2 of CQM1H (See note 2.)  DM 6550  4000 
Uses 1:1 NT 
Link 
Note  1.  RS-422A port of Communications Board.  
  2.  RS-422A port of Serial Communications Board.  
 
Refer to the manuals of the PLC being used for details on using the PLC Setup Area. 
 
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