Omron CQM1H-SCB41 operation manual 100

Using No-protocol Communications Section 6-2

6-2 Application Procedure

1, 2, 3... 1. Turn OFF the power supply to the PC.

2.Mount the Board.

3.Connections

Connect the external devices using RS-232C or RS-422 cables. The TERM and WIRE switches on the front panel of the Board must be set if the Board is connected using the RS-422A/485 port.

The CPU Unit can be connected to a Programming Console, the CX-Pro- grammer, or the CX-Protocol as required.

4.Turn ON power.

5.Set the PC Setup settings for the Serial Communications Board.

Use a Programming Console, the CX-Programmer, or the CX-Protocol to set the settings in the PC Setup between DM 6500 and DM 6559.

Note The settings stored in these words are read constantly; the PC does not need to be restarted or reset when changes are made to the set- tings. They will be updated automatically as soon as they are changed.

The following table shows the settings for using STX as the start code, CR+LF as the end code, and no transmission delay.

Port 1	Port 2	Bit(s)	Setting	Function
DM 6555	DM 6550	00 to 03	0 Hex	Standard port settings
				(1 start bit, 7-bit data, even parity,
				2 stop bits, 9,600 bps)
		04 to 11	---	Not used.
		12 to 15	1 Hex	Serial communications mode
				No-protocol
DM 6556	DM 6551	00 to 07	00 Hex	Baud rate setting disabled.
		08 to 15	00 Hex	Frame format setting disabled.
DM 6557	DM 6552	00 to 15	0000	Transmission delay: 0 ms
			(BCD)	0000 to 9999 (BCD): Set in units
				of 10 ms
DM 6558	DM 6553	00 to 07	---	Not used.
		08 to 11	1 Hex	Start code enabled
		12 to 15	2 Hex	End code enabled as CR+LF
				0: Disable (number of receive
				bytes set)
				1: Set (specified end code)
				2: CR, LF
DM 6559	DM 6554	00 to 07	02 Hex	Start code: STX
		08 to 15	00 Hex	Number of receive bytes
				(Disabled when end code is set.)

6.Write and execute the ladder program. Use TXD(––) to send data to an ex- ternal device and RXD(––) to receive data from an external device.

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