Yamaha SRCP manual Relating to the I/O

					13-3 Troubleshooting for Specific Symptom
13-3-2 Relating to the I/O
No.	Symptom	Possible Cause		Items to Check		Action
1	Output signal	1)	Wiring to external	• Check the wiring.		• Make the correct wiring by referring to
	cannot be		devices is	• Check the operation with the manual		the connection diagram.
	controlled.		incorrect.	instruction of the TPB general-purpose
	• In cases other			output. (Refer to "7-4 Manual Control
	than cause 2,			of General-Purpose Output".)
	the output
		2)	Misprogramming	• Connect the TPB and check the		• Correct the program.
	signal cannot
				program.
	be controlled
	even with the	3)	Output transistor	• Measure the voltage at the PLC input		• Replace the SRCP controller if the
	manual
			is defective.	terminal.		output transistor is defective.
	instruction of
				ON: 0.5V or less.
	TPB general-
				OFF: +IN COM (+24V)
	purpose output.
2	Robot will not	1)	Return-to-origin	• Connect the TPB and check the		• Reperform return-to-origin.
	move even		has not yet been	operation.
	with dedicated		completed.
	command
		2)	Program cannot	• Connect the TPB and check the		• Eliminate the cause of error by
	input.
			be run.	operation.		referring to the error message.
		3)	Signal pulse width	• Check that the signal pulse width is		• Increase the signal pulse width ("on"
			is too narrow.	50ms or more.		duration).
		4)	Time interval	• After canceling emergency stop, allow		• Increase the delay time.
			before inputting a	at least 200ms before inputting a
			dedicated command	dedicated command before inputting a
			after canceling	dedicated command.
			emergency stop is
			too short.
		5)	Interlock signal	• Check the signal by using the TPB DIO		• Turn on the interlock signal.
			remains off.	monitor.
		6)	Another dedicated	• Check the signal input (by using a PLC		• Turn off the dedicated command input.
			command input is	monitor, etc.).
			on.

13

TROUBLESHOOTING

13-9