Omron NT11 - 01-2004 User Manual page 59

Connection to a PLC by the Host Link (RS-422A Type)
Reference
46
Setting the Front Switches
I/O port selector switch
RS-232C
RS-422A
C200HX/HG/HE(-Z)E, CPM1, CPM2A, CPM2C, CQM1H, or SRM1
The connection method depends upon the model of PLC being used, as
shown in the following table.
PLC model
C200HX/HG/HE(-Z)E • Connect to the RS-422A port (port A) on a Serial Commu-
nications Board.
CQM1H • Connect to the RS-422A port (port 2) on a Serial Commu-
nications Board.
CPM1 • Connect to the peripheral port through a CPM1-CIF11 RS-
422A Adapter.
CPM2A, SRM1 • Connect to the peripheral port through a CPM1-CIF11 RS-
422A Adapter.
CPM2C • Connect to the peripheral port (on a CPM2C-CN111 or
CS1W-CN114 Connecting Cable) through a CPM1-CIF11
RS-422A Adapter.
(The CPM2C-CN111 splits the Unit's Communication Port
into a RS-232C port and a peripheral port.)
• There are no Serial Communications Boards for the C200HX/HG/HE(-Z)E
in which port B is the RS-422A port.
• There are no Serial Communications Boards for the CQM1H in which port
1 is the RS-422A port.
Section 2-5
• Host Link communication method
selection (selector switch)
Set this to RS-422A.
• Communications type setting (pin 3)
Set pin 3 to OFF.
(for Host Link communication)
• Host Link default value settings
(pin 4)
To effect the existing DIP switch settings,
set pin 4 to ON.
To effect the values set in the PLC
Setup, set pin 4 to OFF.
Note
For CPU Units manufactured before or
during June 1995 (lot No. @@65), the
existing DIP switch settings differ from
the PLC Setup default values as follows.
- Existing DIP switch settings:
2,400 bps, 1 stop bit, even parity, 7 bit
data length
- PLC Setup default values:
9,600 bps, 2 stop bits, even parity, 7 bit
data length
For CPU Units manufactured from July
1995 onward (lot No. @@75), the
stipulated values in the DIP switch
settings also are 9,600 bps and 2 stop
bits.
• Terminator setting (pin 6)
Set this switch to ON.
(Set terminator ON.)
Connection method