Delta PD-01 user manual Troubleshooting via LED displays, Led, Off, Profibus

PD-01 PROFIBUS-DP Module

Chapter 6 Troubleshooting

Troubleshooting via LED displays

Two LEDs, SP and NET LED, are used to monitor the PD-01 communication status.

Possible LED displays of NET LED:

LED	Indication	Corrective Actions
OFF	No Power Supply	Verify that the power supply of PD-01.
		Check whether the power supply is
		connected and that power is applied to
		the PD-01 through the connector.
Red, flickering (rapid	Invalid PROFIBUS address	Check whether the switch value is
blinking)	set via switch	valid, valid value of slave is within
		1-125. Set the valid value and re-power
Red, blinking	Communication link to	User parameter are sent by master
	PROFIBUS, but No cyclical	(from GSD file), for example, if d_state
	data exchanged, or	is set 1, ensure the data in Data Output
	Extended user parameter	1 ~ Data Output 1 + dout_len are
	error	continuous addresses. Otherwise,
		PD-01 will not be able to pass the
		Parameterization check.
Red ON	No connection to	1. Verify that network installation is OK.
	PROFIBUS	2. Verify that PLC is working.
		3. Verify that switch address setting is
		correct.
Green, blinking	“Master” is in “Stop” mode,	Turn the KEY of PLC to RUN mode,
	and cyclical process data	and send the control command to
	exchange in progress, but	PD-01.
	set-points invalid (control
	word = 0)
Green ON	Cyclic data exchange in
	progress and OK

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