116
Connecting to the Host’s RS-422A/485 Port Section 5-2
The following are the communications 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 communications condi-
tions listed in the following table. Set the same communications conditions at
the NT31/NT31C by the memory switch. (page 166).
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.
Connecting an NT31/NT31C and Host (RS-422A)
Wiring When Connecting a C-series Host Link Unit or CPM1 (Host Link)
Applicable Units:
Item Setting at Host
Input/Output board RS-422A
Communications 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
NT31/NT31C
RS-422A cable with connectors (max. length: 500m)
25-pin
connector
Serial port B
(RS-422A, 25-pin type)
9-pin connector or
25-pin connector
Host link, CPU Unit,
Communications
Unit/Board
SYSMAC
CS/CJ-series PLC,
C-series PLC,
CVM1/CV-series
PLC, SRM1
C200H-LK202-V1
3G2A5-LK201-EV1
C500-LK203
3G2A6-LK202-EV1
NT31/NT31C
RS-422A
Host
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