Omron Programmable Terminals NT31 NT31C Setup Manual page 89

Connecting to the RS-232C Port at the Host
When Using the Memory
Link Method
78
Setting the Front Switches
Set the unit number of the serial communication unit by using the rotary switch
located on the front panel. Set each switch with a flat blade screwdriver so that
the values or symbols in the setting value window agree with the following.
SCU21
RDY
RUN
ERC ERH
SD1 SD2
RD1 RD2
UNIT
F E
1 0
No.
D
3 2
C
5 4 B A
7 6
9 8
Allocation DM Area Settings for CPU
Setting is written from the Programming Device (a Programming Console or CX-
Programmer) directly into the allocation DM area (system setting area) of the
CPU. After the setting is written, it becomes effective by turning the power ON,
restarting the unit, restarting the communication port, or execution of the STUP
command.
In the following, the channel numbers of the allocation DM area and settings are
shown.
Allocation DM area (CH)
Port 1 Port 2
m m+10
m+1 m+11
m+6 m+16
In the memory link method, the connection can be made to a personal computer
with RS-232 and an FA computer, etc.
When connecting to the host in 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 in 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 follow-
ing table. Set the same communication conditions at the NT31/NT31C by the
memory switch. (page 165).
Item
Input/Output port
Communication speed
Data bits length
Stop bits length
Parity
Flow control
Set the unit number to 0 through F so
that it will not overlap with the numbers
used in other units.
Word m = DM30000 + (100 × unit number)
Writing Writing
Value
8200 NT link (1:N) mode
000A Communications baud rate (high-speed)
j = The largest model number of the
000j
connected PT (0 - 7)
Settings at the host
RS-232C
1200, 2400, 4800, 9600, 19200, 38400 bps.
7 bits, 8 bits
1 bits, 2 bits
None, even, odd
None, RS/CS, XON/XOFF
Section 4-1
Settings Settings