Omron NT21 - SETUP MANUAL 10-2001 Setup Manual page 90

Connecting to the Host's RS-422A/485 Port
Setting the Front Switches
I/O port selector switch
RS-232C
RS-422A
Connecting to a C-series C200HX/HG/HE(-Z)E or CQM1H
PC Setup Settings
Write the PC Setup (data memory) settings directly from a Programming Device
(e.g., CX-Programmer) in accordance with the host model.
Host Model
Port A of C200HX/HG/HE(-Z)E
*2
Port 2 of CQM1H
*1 RS-422A port of the Serial Communications Board
*2 RS-422A port of the Serial Communications Board
For details on operations relating to the PC Setup, refer to the manual for the PC
you are using.
Setting the DIP Switches on a C200HX/HG/HE(-Z)E Serial Communica-
tions Board
Set the switches on a C200HX/HG/HE(-Z)E Serial Communications Board as
follows.
Switch 1: Set to 4 (4-wire, for RS-422A)
Switch 2: Set to ON for terminator ON (terminating resistance applied)
Setting Switches on a CQM1H Serial Communications Board
Set the switches on a CQM1H Serial Communications Board as follows.
Wire selection (WIRE): Set to 4 (4-wire, for RS-422A)
Terminator (TERM):
@ Host Link communication method selection
(selector switch)
Set this to RS-422A.
@ Communications type setting (pin 3)
Set this switch to ON.
(for communication by NT link)
@ Terminator setting (pin 6)
Set this switch to ON.
(Set terminator ON.)
Word Writing Value
*1
DM6555
DM6550
Set to ON for termination ON.
Serial Communications Board
(Inner Board slot 1)
Terminator Switch (TERM)
Set to ON (right side).
Wire Selection Switch (WIRE)
Set to 4 (right side).
Section
Setting
4000 Use 1:1 NT Link
4000
5-1
79