Omron Programmable Terminals NT631C User Manual
Page 131
114
Connecting to the Host’s RS-422A/485 Port
Section 5-2
*1
For example, when connecting PTs with model numbers 3, 4, 5, and 6 to
port 2, set the value 8200 hex to DM32010, 000A hex to DM32011, and
0006 hex to DM32016.
Connecting to a CS/CJ-series Serial Communications Unit
CS/CJ-series Rack-mounting Units:
CS1W-SCU31-V1 (Port 1 and 2 are RS-422A/485 port.)
CJ1W-SCU31-V1 (Port 1 and 2 are RS-422A/485 port.)
CJ1W-SCU41(-V1) (Port 1 is an RS-422A/485 port.)
Setting the Front Switches
Set the unit number of the Serial Communications Unit using the rotary
switches on the front of the Unit. Set the number or symbol in the setting dis-
play window in the following way using a flat-blade screwdriver. When using a
CS/CJ-series Serial Communications Unit set the switches as shown below.
2-wire or 4-wire selector (WIRE):
(4-wire = RS-422A), or
(2-wire = RS-485)
Terminating resistance switch (TERM): ON (terminator ON = terminating
resistance enabled).
DM Area Allocation Settings
From the Programming Device (i.e., a Programming Console or CX-Program-
mer), write the settings directly to the CPU Unit's DM Area Setup Area. After
the settings have been written, they will be enabled when the power supply is
cycled, the Unit is restarted, the communications port is restarted, or a STUP
instruction is executed.
The DM Area words that are allocated and the contents of the settings are
given in the following table.
m = DM 30000 + 100
× unit number
When using the Memory
Link Method
With the memory link method, the connection can be made to a personal
computer and an FA computer with RS-422A.
When connecting to the host with the memory link method, it is necessary to
create a program for the memory link at the host side.
Allocated DM Area
words
Setting
Setting Contents
Port 2
DM32011
000A
Baud rate (standard)
DM32016
000
@
@
= The highest unit number of the connected
PTs (0 to 7)
Allocated DM Area
words
Setting
Setting Contents
Port 1
Port 2
m
m+10
8200
1:N NT Link Mode
m+1
m+11
000A
Baud rate (standard)
m+6
m+16
000
@
@
= The highest unit number of the con-
nected PTs (0 to 7)
4
2