Omron CQM1H-SCB41 operation manual Level Possible changes in settings

Using Protocol Macros Section 5-5

Level	Item	Setting
Send message	Header <h>	“@”
SD (00) _1	Terminator <t>	[2A0D]
	Error check code <c>	LRC (horizontal parity) (0) (2 bytes of ASCII)
	Length <l>	---
	Address <a>	$ (R (1) ) ,2)
	Message edited	<h> + <a> + “1” + “00” + “0000” + <c> + <t>
		Data
Receive message	Header <h>	“@”
RV (00) _1	Terminator <t>	[2A0D]
	Error check code <c>	LRC (horizontal parity) (0) (2 bytes of ASCII)
	Length <l>	---
	Address <a>	& (R (1) ) ,2)
	Message edited	<h> + <a> + “00” + “00” + & (W (1) ,4) + <c> + <t>
		Data

Handling Communications Problems for Standard System Protocols

The CQM1H-series PCs provide standard system protocols to enable commu- nications with OMRON components without having to create communications sequences. The sequences in the standard system protocols can be executed merely by setting operands for the PMCR(––) instruction.

Processing for communications line problems during communications for the standard system protocols are set to normal settings, as shown in the following table. If these settings are not suitable to the application or if improvements are desired, use the CX-Protocol to modify the following settings in the required se- quences. For details on the use of the CX-Protocol, refer to the CX-Protocol Op- eration Manual (W344). Refer to the appendices for the settings in the standard system protocols.

Level	Item	Possible changes in settings
Sequence	Link words	No reason to change.
parameters
	Transmission control
	parameters
	Response
	notification method
	Reception wait time	The monitoring times are set to 3 seconds
	Tr	for most sequences. The settings are
		different for send-only and receive-only
	Reception finished
		sequences, as well as for sequences that
	wait time Tfr
		require time for responses.
	Send finished wait
	time Tfs
Step	Repeat counter	No reason to change.
parameters
	Command
	Retry count	The retry count is general set to 3 retries (4
		tries total) for sequences that use the
		SEND&RECEIVE command. Different
		settings are used for sequences that have
		other commands.
	Send wait time	No reason to change.
	Send message
	Receive message
	Response write
	enable
	Next process
	Error process

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