Emerson Process Management 5300 manual Diagnostic Messages, 3for information on possible causes

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

DIAGNOSTIC

MESSAGES

Troubleshooting		If there is a malfunction despite the absence of diagnostic messages, see
		Table 7-3for information on possible causes.
Table 7-3. Troubleshooting
chart
	Symptom			Possible cause		Action
	No level reading		•	Power disconnected	•	Check the power supply
			•	Data communication cables	•	Check the cables for serial data
				disconnected		communication
			•	Probe is not connected	•	View the Diagnostic window, see
						“Diagnostics” on page 7-23 in order to
						check active status messages
					•	Check if “Probe Missing” is active. If it is,
						check the probe connection
	No HART communication.		• COM Port configuration does not match		• Check that correct COM Port is selected in
				the connected COM Port		the HART server (see “Specifying the COM
			• Cables may be disconnected			Port” on page 5-15
			• Wrong HART address is used		• Check wiring diagram
			•	Hardware failure	•	Verify that the 250 Ω resistor is in the loop.
			•	HART resistor	•	Check cables
					•	Make sure that correct HART short address
						is used. Try address=0
					•	Check Analog Output current value to verify
						that transmitter hardware works
					•	Check that the correct settings are used in
						RRM. Select Device, Search from the
						menu. Click Settings and HART tab. Make
						sure the values are properly chosen. The
						standard values are shown on page 5-10
	Analog Out is set in Alarm.		Measurement or transmitter failure.		View the Diagnostic window, see
					“Diagnostics” on page 7-23to check active
					error and status messages.
	Both Surface pulse and Interface		Measurement Mode is set to “Level Only”.		Set Measurement Mode to “Level and
	Pulse are detected, but Interface				Interface” (see “Basic Configuration
	Level is reported as unknown in the				Parameters” on page 5-4).
	Echo Curve plot.
	Both Surface pulse and Interface		•	Interface pulse is identified as a double	No action required. Use the Echo Curve plot
	pulse are detected, but Interface			bounce	to verify that the surface and interface are
	Level is reported as unknown in the		•	Surface pulse and Interface pulse are	close, see “Analyzing the Measurement
	Echo Curve plot.			very close	Signal” on page 7-3.
	Surface pulse is detected, but Level is		•	Wrong Probe Type set	View the Diagnostics window, see
	incorrectly reported as Full or Empty.		•	Bad Reference Threshold value	“Diagnostics” on page 7-23,to check active
					messages and check if the warning “Full
					Tank/Empty Tank” is active. If this is the case,
					check that:
					•	the transmitter is configured with correct
						probe type
					•	the reference pulse is below the reference
						amplitude threshold. If not, adjust
						reference threshold to an appropriate
						value

7-33