Omron CQM1H-SCB41 operation manual Application Example, Conditions, PC Settings, Computer Settings

Using No-protocol Communications			Section 6-4
	Port 1	Port 2	Function
	IR 20100 to IR 20103	IR 20108 to IR 20111	Error Code
			0: Normal operation
			1: Parity error
			2: Framing error
			3: Overrun error
	IR 20104	IR 20112	Communications Error Flag
	IR 20107	IR 20115	Reception Overflow Flag (Turns ON
			when data is received again before
			the previous data is read with
			RXD(––).)
	IR 20200 to IR 20215	IR 20300 to IR 20315	Reception counter
			Provides the number of bytes of
			data received in 4-digit BCD (0 to
			256).

The Port 1 Restart Bit (IR 20700) and Port 2 Restart Bit (IR 20701) can be turned ON to initialize the serial communications ports. These bits will be turned OFF automatically after the ports have been initialized.

6-4-4 Application Example

This example shows how to send data from DM 0100 to DM 0104 (each word contains 3454) to a computer and then store data received from the computer starting at DM 0200.

Conditions

PC Settings

The following settings are made in the PC Setup before executing the program.

Communications mode: No-protocol

Port settings:	Standard
Start code:	None
End code:	CR + LF
Other:	Default settings

Computer Settings

Set the same communications parameters as the PC and prepare the programs to send and receive data.

Ladder Programming

00100

	Transmission
00101	Enabled Flag

Reception

Competed Flag

20106

DIFU (13) 00101

TXD

DM0100

#0100

#0010

RXD

DM0200

#0100

#0256

1, 2, 3... 1. When IR 00100 turns ON, the contents of DM 0100 to DM 0104 will be sent with most significant bytes first from port 1 on the Serial Communications Board if IR 20105 is ON (Transmission Enabled Flag).

The following data will be received at the computer: 34543454345434543454CRLF

2.When IR 20106 (Reception Competed Flag) turns ON, 256 bytes of data re- ceived on port 1 on the Serial Communications Board will be read and stored starting at DM 0200 with most significant bytes first.

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