Omron NT31 NT31C manual PC model Connection method

Connecting to the RS-232C Port at the Host Section 4-1

Setting the Front Switches

I/O port selector switch RS-232C

RS-422A

@I/O port selection (selector switch) Set this to RS-232C.

@System setting (DIP SW4)

To effect the existing DIP switch settings, set SW4 to ON.

To effect the existing PC Setup, set SW4 to OFF.

Note

For CPUs manufactured before or during June 1995 (lot No. jj65), the existing DIP switch settings differ from the existing PC Setup as follows.

-DIP switch settings:

2,400 bps, 1 stop bit, even parity, 7 bit data length

-PC Setup:

9,600 bps, 2 stop bits, even parity, 7 bit data length

For CPUs manufactured from July 1995 onward (lot No. jj75), the stipulated values in the DIP switch settings also are 9,600 bps and 2 stop bits.

C-series C200HS, C200HX/HG/HE(-Z)E, CPM1, CPM2A, CPM2C, CQM1, CQM1H CPUs, SRM1

The connection method depends upon the model of PC being used, as shown in the following table.

PC model	Connection method
C200HS, CQM1	Connect to the CPU Unit’s built-in RS-232C port.
C200HX/HG/HE(-Z)E	• Connect to the CPU Unit’s built-in RS-232C port.
	• Connect to one of the RS-232C ports (port A or port B) on a
	Serial Communications Board.
CQM1H	• Connect to the CPU Unit’s built-in RS-232C port.
	• Connect to the peripheral port through a CS1W-CN118
	Connecting Cable.
	• Connect to the RS-232C port (port 1) on a Serial Commu-
	nications Board.
CPM1	Connect to the peripheral port through a CPM1-CIF01
	RS-232C Adapter.
CPM2A, SRM1	• Connect to the CPU Unit’s built-in RS-232C port.
	• Connect to the peripheral port through a CPM1-CIF01
	RS-232C Adapter.
CPM2C	Connect to the CPU Unit’s RS-232C port or the peripheral
	port through a Connecting Cable (CPM2C-CN111,
	CS1W-CN118, or CS1W-CN114).
	(The CPM2C-CN111 splits the Unit’s Communication Port
	into a RS-232C port and a peripheral port. A CPM1-CIF01
	RS-232C Adapter is also required to connect to this
	peripheral port.)

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