Canon RE-350 manual Timing Charts, RTS/CTS Flow Control Timing Chart, Command, Response

6.0 Timing Charts

6.1 RTS/CTS Flow Control Timing Chart

PC SIDE SIGNAL
RTS	1				5
	T1
CTS		2		4	T3
TXD				T2
		3	Command		T4

RXD

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C-Response

Mark	Duration period
	Min.	Max.
T1	-	300ms
T2	0ms	200ms
T3	10ms	T4-T2
T4	10ms	*1

1If the PC is ready to communicate with the RE-350, the PC should set the RTS line to ON. The RE-350will recognize that its RS-232Cconnector is connected to the PC. When the RTS is OFF and the PC tries to send some data, the RE-350will disregard the sent data.

2Once the RE-350recognizes that the RTS of the PC is ON, the RE-350will set the CTS of the PC to ON within T1 after RTS is ON. The application software on the PC can recognize if the RE-350is operating properly.

3After the PC recognizes the CTS is ON, the PC can send the command packet to the RE-350.

4Once the RE-350receives the command packet, the RE-350will set CTS to OFF and perform the operation depending upon the command data from the PC to tell the PC that the RE-350cannot receive another command packet during this period.

5After finishing the operation, the RE-350will set CTS to ON to tell the PC that the RE-350can receive another command packet.

6At the same time, the RE-350will send the “C-response Packet” to notice the result of its operation. The period (T4) between the reception and transmission of the “C-response Packet” is determined by the type of command given.

Note: If the RE-350does not follow the above timing chart, the power or connection of the I/F cable is incorrect.

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