Omron NT31 Operation Manuals page 143

Connecting to the Host's RS-422A/485 Port
When using the Memory Link Method
132
Allocation
DM area
Writing Value
(CH)
Port 2
DM32010 8200
DM32016 000j
When connecting the PT with its model number from 3 to 6 to port 2 in the NT link
(1:N), for example, set a value of 8200 Hex for D32010CH, and 0006 Hex for
D32016CH.
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.
The following are the communication conditions that can be used with the memory
link method. For the host (a personal computer, an FA computer, etc.), its setting
should be compatible to one of the communication conditions listed in the following
table. Set the same communication conditions at the NT31/NT31C by the memory
switch. (page 181).
Item
Input/Output board
Communication speed
Data bits length
Stop bits length
Parity
Flow control
NT link (1:N) mode
j
= The largest model number of the con-
nected PT (0 – 7)
Setting at Host
RS-422A
1200, 2400, 4800, 9600, 19200, 38400 bps.
7 bits, 8 bits
1 bit, 2 bits
None, even, odd
None, XON/XOFF
Section 5-2
Settings