
112
Reference Manual
00809-0100-4811, Rev DA
Section 6: Service and Troubleshooting
January 2015
Service and Troubleshooting
6.4 Diagnostic messages
6.4.1 Troubleshooting
If there is a malfunction despite the absence of diagnostic messages, see Tab le 6 -1 for
information on possible causes.
Table 6-1. Troubleshooting Chart
Symptom Possible cause Action
No HART communication.
• COM Port configuration does not match
the connected COM port.
•Cables may be disconnected.
• Wrong HART address is used.
•Hardware failure.
• Check that the correct COM Port is
selected in the HART server (see
“Specifying the COM port” on page 75).
• Check wiring diagram.
• Verify that the 250 resistor is in the
loop.
• Check cables.
• Make sure the correct HART short
address is used. Try address=0.
• Check Analog Output current value to
verify that transmitter hardware works.
Analog out is set in alarm. Use the command “Read Gauge Status” to
check active errors.
Both P2 and P3 are detected but Interface Level
is reported as Not A Number (NAN) in the
waveform plot.
Measurement Mode is set to “Level Only”. Set Measurement Mode to “Level and
Interface” (see “Basic configuration” on
page 69).
Both level and interface level are reported as
NAN.
Probe is not connected. Use the command “Read Gauge Status”
and check if error “Probe Failure” is active. If
this is the case, check the probe
connection.
Both P2 and P3 are detected but the interface
level is equal to the product Level.
• P3 is identified as a double bounce.
•P2 and P3 are very close.
Adjust thresholds T2 and T3, see
“Amplitude threshold settings” on
page 104 for more information.
P2 is detected but level is incorrectly reported as
full or empty.
Use the command “Read Gauge Status”
and check if the warning “Probe Immersed”
is active. If this is the case, check that:
• the transmitter is configured with
correct probe type,
• the reference pulse (P1) is below
amplitude threshold T4. If not, adjust
T4 to an appropriate value.
The reference pulse is not detected.
•The tank is full.
• The transmitter is configured with wrong
probe type.
• Amplitude Threshold T1 is not correct.
• Check the product level.
• Check that the correct probe type is
configured.
• Check amplitude threshold T1.
Level accuracy seems off.
• Configuration error. • Check the reference gauge height
parameter.
• Check status information and diagnostic
information.
Integral display does not work.
• Check the display configuration.
• Check loop power.
• Check display connection.
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