Eaton Electrical EZ204-DP user manual Appendix, What Happens If ...?, Event Explanation Remedy

Appendix

What Happens If ...?

Event	Explanation		Remedy
POW LED not lit	No power supply		Connect and switch on power
			supply
POW LED flashing	Data transfer via EZ-LINK OK
BUS LED not lit	No PROFIBUS-DP data		Connect and start
	communication		PROFIBUS-DP
BUS LED lit	Data transfer via PROFIBUS-
	DP OK
Slave not signalling	–	No slave address set	–	Set slave address
	–	No bus terminating resistor	– Set bus terminating resistors
		present	–	Check connection
	–	Cable, plug faulty	–	Provide power supply to
	–	No power supply		device
Write command rejected	–	Command not permissible	–	Change command
	–	EZ display not on the Status	–	Show Status display
		display
Actual value is zero	No actual value present		Function relay does not have an
			actual value or not triggered

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