Omron Programmable Terminals NT31 NT31C Setup Manual page 127

Connecting to the Host's RS-422A/485 Port
Reference: Serial Communications Boards and Serial Communications Units with lot num-
When using the Memory
Link Method
116
PCs supporting direct connection to
the CPU Unit
---
*1 A CS1W-SCB41 Serial Communication Board is required.
Settings at the Host
Connecting to a CS1 Series Serial Communications Board
Serial Communications Board equipped with an RS-422A/485 port for CS1-se-
ries CPU Units:
CS1W-SCB41 (Port 2 is an RS-422A/485 port.)
ber 991220 (12/20/99) and later support the high-speed 1:N NT Link. Boards and
Units with earlier lot numbers cannot be used.
Setting the Front Switches
RDY
COMM1
COMM2
Port 1
RS-232C
OFF ON TERM
2
4
Port 2
RS-422A/485
SCB41
CPU Allocation DM Area Settings
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 table, the relevant word addresses in the allocation DM area and
settings are shown.
Allocation DM area
Writing Writing
Value
Port 2
DM32010 8200
DM32011 000A
DM32016 000j
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.
With the memory link method, the connection can be made to a personal com-
puter and an FA computer with RS-422A.
PCs supporting connection through a
Serial Communication Board
CS1G-CPU42/43/44/45-E(V1)
CS1H-CPU63/64/65/66/67-E(V1)
PORT1
Terminator Switch (TERM)
Set to ON (right side)
WIRE
Wire Selection Switch (WIRE)
PORT2
RS-422A: Set to 4 (right side) for 4-wire type.
(RS422/
RS-485: Set to 2 (left side) for 2-wire type.
RS485)
NT link (1:N) mode
Communications baud rate (high-speed)
j = The largest model number of the
connected PT (0 – 7)
Section 5-2
(*1)
(*1)
Settings Settings