Emerson 5081-T instruction manual Fault Conditions, Disabling Faults, NON- Disabling Warnings

MODEL 5081-T

10.2 FAULT CONDITIONS

Three classes of error conditions/problems are detected and differentiated between by the diagnostic program. System disabling problems are faults caused by failures in the loop or significant variations in the process. System non-disabling problems are warnings and deal with input or A to D conversion settings. The third class of detected problems are error messages and occur when the calibration limits are exceeded.

10.2.1 DISABLING FAULTS

1.Both FAULT and HOLD annunciation fields will become active (see Figure 10-3).

2.The process variable will flash at the rate of 1 sec- ond ON and 1 second OFF.

3.The appropriate fault message alternates with the normal Temperature/Current output display (see Figure 10-2).

A	♥
F
U	'"""	µS/cm
T
L
H
O
L
D

CALIBRATE PROGRAM DIAGNOSE

“ [ 5 P 1 ! 2 - 5 [ ” ￿ ! ! !

E X I T N E X T E N T E R

FIGURE 10-2. Disabling Fault Annunciation

SECTION 10.0

DIAGNOSIS AND TROUBLESHOOTING

4.The output current loop will be forced to the non-zero fault value entered in Step 3 of Section 7.2 or held at last value if fault value=0, if the transmitter is not in the TEST, HOLD, or Multidrop operational modes.

5.A 0-1 mA output signal is available for external use when system disability conditions are active. These conditions drive this output to 1 mA. Please contact factory for specific application information.

10.2.2NON- DISABLING WARNINGS

When a non-system-disablingcondition occurs, a warn- ing message is displayed. The process variable does not flash. The appropriate message alternates with the Temperature/Current output display (see Figure 10-3).

If more than one fault exists, the display will sequence through each diagnostic message. This will continue until the cause of the fault has been corrected.

♥

'""" µS/cm

CALIBRATE PROGRAM DIAGNOSE

“ 5 P : V U ! @ M - S P ” ￿ !

E X I T N E X T E N T E R

FIGURE 10-3. Warning Annunciation

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