Omron NT31 NT31C manual 104

Connecting to the Host’s RS-422A/485 Port Section 5-2

C1000H/C2000H rack-mounting type: 3G2A5-LK201-EV1

Setting the Front Switches

Mode

selector

Host Local

@ Mode selector (key switch) Set this to Host link.

Setting the Rear Switches

I/O port

RS-422A

RS-232C

Synchronization

Internal

External

Terminator

OFF

ON

CTS

0V External

	@ I/O port selection (selector switch)
	Set this to RS-422A.
8
7
6	SW1
5
	@ Unit # (DIP SW1)
4
3	Set SW1-1 to SW1-5 to OFF (0).
2
1
ON	@ Synchronization (selector switch)
8	Set this to Internal.
7
6	SW2
5
	@ Communications speed
4
	(DIP SW2-1 to SW2-4)
3
2	Set these switches to 0010 to select
1
ON	19200 bps.
	Set these switches to 1010 to select
	9600 bps.
	(0: OFF 1: ON)
	@ 1-to-1/1-to-N selection (DIP SW2-6)
	Set SW2-6 to OFF (0) (1-to-N).
	@ Instruction level (DIP SW2-7, SW2-8)
	Set these switches to ON (1).
	(Levels 1, 2, and 3 are enabled.)
	@ CTS selection (selector switch)
	Set this always to 0V (ON).
	@ Terminator setting (selector switch)
	Set this switch to ON.

104