Omron CQM1H-SCB41 operation manual Send/Receive Message Frames, Start code End code Yes

Using No-protocol Communications								Section 6-1
Send/Receive Message Frames
Start code				End code
		No		Yes				CR+LF
No
		Data		Data	ED			Data	CR+LF
		256 bytes max.		256 bytes max.			256 bytes max.
Yes
	ST	Data	ST	Data	ED	ST		Data		CR+LF

256 bytes max.

256 bytes max.

256 bytes max.

•Only the first start code is valid if there is more than one start code.

•Only the first end code is valid if there is more than one end code.

•Use CF+LF if using an end code may cause receptions to be interrupted be- cause the end code exists in the receive data.

•A transmission delay can be set for PC-initiated communications as a mini- mum interval between sending commands to the host.

The delay is not used in sending the first command. The delay will affect oth- er commands only if the time set for the transmission delay has not expired when the next command is ready to be sent.

If the delay time has already expired when the next command is ready, the command will be spent immediately. If the delay time has not expired, the command will be delayed until the time set for the transmission delay has expired.

The operation of the transmission delay for PC-initiated communications is illustrated below.

Transmission delay		Transmission delay	Transmission delay
Command sent		Command sent	Command sent		Command sent
1st TXD(––)	2nd TXD(––)		3rd TXD(––)	4th TXD(––)		Time
command	command		command	command

Refer to the CQM1H Programming Manual for details on TXD(––) and RXD(––).

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