Emerson Rosemount5081, Инструкция по эксплуатации, Страница: 92 / 152

Diagnostic variables mnemonics Table 8-2:
AbS Absolute conductivity (µS/cm or mS/cm)
0 A ir Sensor zero in air
CELL ConSt Sensor cell constant (used in C mode)
tSLOPE Temperature slope in %/° C
CAL F Calibration factor
SoFt Software version
HArd Hardware version
FAuLtS Show fault messages
nonE No fault messages in memory
8.2.2 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 detection problems are error
messages and occur when the calibration limits are exceeded.
Disabling faults
The following things happen when a disabling fault occurs.
1. Both FAULT and HOLD annunciation fields become active ( Figure 8-8 ).
2. The process variable flashes at the rate of 1 second on and 1 second off.
3. The appropriate fault message alternates with the normal Temperature/Current
output display (see
Figure 8-8 ).
4. The output current loop is forced to run the non-zero fault value last entered 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 applciation information.
Diagnostics and troubleshooting
82 Rosemount 5081