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5-2SectionConnecting to the Host’s RS-422A/485 Port
117
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 165).
Item Setting at Host
Input/Output board RS-422A
Communication speed 1200, 2400, 4800, 9600, 19200, 38400 bps.
Data bits length 7 bits, 8 bits
Stop bits length 1 bit, 2 bits
Parity None, even, odd
Flow control None, XON/XOFF
5-2-2 Direct Connection between RS-422A Ports at Both Units
The connection method in which the RS-422A ports of an NT31/NT31C and a
host are connected is described here.
NT31/NT31C
Host link/CPU/
Communication unit
SYSMAC
CS1 series PLC,
C series PLC,
CVM1/CV series
PLC, SRM1
9-pin connector or
25-pin connector
Serial port B
(RS-422A, 25-pin type)
25-pin
connector
RS-422A cable with connectors (max. length: 500m)
Connecting an NT31/NT31C and Host (RS-422A)
NT31/NT31C
RS-422A
Host
Wiring When Connecting a C-series Host Link Unit or CPM1 (Host Link)
Applicable units:
C200H-LK202-V1
3G2A5-LK201-EV1