Samsung SSA-P401T Action, No communication is available, when the system is in sync with the

Problem				Action
No communication is available	1) Check the communication settings between the PC application and the device.
when the system is in sync with the	- Check the board ID (COMM address) and match it with that of the PC application.
PC.
	- Specify a unique board ID (COMM address) for each of the multiple devices.
	- Check the baud rate if it matches with the PC application.
	- If you initialize the device, it will be defaulted to 9,600bps.
	- Check if the communication port of the PC matches that of the PC application.
	- Check the communication settings of the PC application.
		Parity Bit : NONE, Data Bit: 8bit, Stop Bit: 1bit
	2) Check the connection status of RS-232 and RS-422.
		RS-232		RS-422 (Independent Communication)
		SSA-P400	PC	SSA-P400		RS-232/RS-422		PC
							Converter
		TX Port	RX	RX(-)			TX(-)
		RX Port	TX	RX(+)			TX(+)	Connected to the
								RS-232 cable of the
		GND	GND	TX(-)			RX(-)
								converter
				TX(+)			RX(+)
			Rs-422 (Multi-Unit Communication)
		SSA-P400	SSA-P400	RS-232/RS-422				PC
		RX(-)	RX(-)		TX(-)
		RX(+)	RX(+)		TX(+)			Connected to the
								RS-232 cable of the
		TX(-)	TX(-)		RX(-)
								converter
		TX(+)	TX(+)		RX(+)
	For RS-422 communications, install a termination resistor at the point where the
	system is connected to the RS-422/RS-232 converter of the PC.
	(Install a 120Ω termination resistor between the RX+ and the RX- terminals on the
	device side, another 120Ω between the TX+ and the TX- terminals; the same
	should be done to the converter. If you are not sure about the wiring, contact the
	customer service for your help.)
	If the problem persists after you followed the instructions above, this may be caused
	by the defective of an internal circuit. Contact the customer service.

¼If no communication is established after you tried to do so with multiple devices, pick just one device and connect it to the RS-232/RS-422 converter, and to the PC. Then, check if there is any communication available.

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