Omron NT21

4-1SectionConnecting to the RS-232C Port at the Host
42
Item Switch Setting
Command level Level 1, 2, 3
Unit # 00
*1 Set the Host Link baud rate at 9,600 bps or 19,200 bps with the memory switch
at the NT21. For details, refer to Setting the Host Link Method (page 127).
*2 The 1-to-N setting enables BCC (Block Check Character). It is not actually
possible to connect more than one NT21 in a single Host Link.
The setting methods for each Unit are described below.
Connecting to a C-series Host Link Unit
C200H/C200HS/C200HE/HG/HX (-Z)E Rack-mounted Unit:
C200H-LK201-V1
Setting the Front Switches
Set
each switch with a flat blade screwdriver so that the values or symbols in the
setting value window agree with the following.
LK201
RUN
RCV
XMT
ERROR
SW1
0
0
5
2
@ Unit # (SW1, SW2)
Set these switches to 0.
@ Command level, parity , and transfer code (SW4)
Set this switch to 2.
@ Baud rate (SW3)
Set this switch to 5 to select 9,600 bps.
Set this switch to 6 to select 19,200 bps.
SW3
SW2
SW4
Setting the Rear Switches
ON
1
CTS selector switch
External
0V (ON)
@
1-to-1/1-to-N selection (DIP switch)
Set pin 3 to ON.
@ CTS selection (selector switch)
Set this always to 0V (ON).
2
3
4
Connecting to a CVM1/CV-series Host Link Unit
CVM1/CV-series Rack-mounted Unit: CV500-LK201
A CVM1/CV -series Host Link Unit (CV500-LK201) has two connectors (commu -
nication ports 1 and 2). Either of these ports can be used for connection to an
NT21
by the RS-232C method. However , since the connectors at these ports are
of different types, a cable that matches the connector must be prepared.
• Communication port 1
Communication port 1 is a 25-pin connector for RS-232C use only.
• Communication port 2
Communication port 2 is a 9-pin connector that allows selection of the
RS-232C
or RS-422A method. When this port is used with the RS-232C meth -