Omron CQM1H-SCB41 operation manual Using Standard System Protocols, Port Bits Setting Function

Using Protocol Macros Section 5-3

Note The PC Setup settings for the Serial Communications Board are read constantly during PC operation. It is not necessary to restart the PC after changing these settings.

The default settings are shown in the following table. These are the standard settings for protocol macros.

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 07	---	Not used.
		08 to 11	---	Not used.
		12 to 15	6 Hex	Communications mode:
				Protocol macro
DM 6556	DM 6551	00 to 07	---	Baud rate setting disabled.
		08 to 15	---	Frame format setting disabled.
DM 6557	DM 6552	00 to 15	---	Not used.
DM 6558	DM 6553	00 to 15	---	Not used.
DM 6559	DM 6554	00 to 15	---	Not used.

6.Run the system as described below in Using Standard System Protocols or in Using User-created Protocols.

Using Standard System Protocols

	Executed
CPU Unit	with
	PMCR(––)

Uses standard system protocol No. 600

External device

Example: K3N Series

Serial CommunicationsDigital Panel Meter

Board

1, 2, 3... 1. Setting the Send Data

Refer to information on the 2nd operand of PMCR(––) in Appendix B Com- poWay/F Master Protocol and set the number of send data words in S, and set the send data starting in S+1.

2.Coding PMCR(––)

The following example shows how to use a Serial Communications Board to read the present value for a K3N-series Digital Panel Meter using the Com- poWay/F Master standard system protocol sequence No. 600: Send/Re- ceive with ASCII Conversion and Response.

	Protocol Macro
Input condition	Executing Flag

PMCR

#1600

DM0000

DM1000

1:Use port 1, 600: Sequence No. 600 First word of send data

First storage word for receive data

If the input condition turns ON when the Protocol Macro Executing Flag (IR 20708 for Port 1) is OFF, communications sequence No. 600 of the stan- dard system protocol in the Serial Communications Board is called, and data is sent and received via port 1 of the Serial Communications Board.

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