Honeywell STT700 SmartLine User Manual page 15

Sensor1 excess LRV
correct
Sensor1 excess
URV correct
Suspect Input
Fixed Current Mode
Input1 Fault
Input2 Fault
Analog Output Saturated
Excess Delta Detect
ADC Fault
Sensor2 excess LRV
correct
Sensor2 excess
URV correct
Input1 Out Of Range
Revision 2
Applied Input 1 value and
measured value differ by
more than 1.5% span at
low calibration point
Applied Input 1 value and
measured value differ by
more than 1.5% span at
high calibration point
MCU reference voltages
are beyond limits and
hence inputs measured
may not be correct
The 4-20mA loop is put in
fixed current mode and is
not following the PV value
Input1 may be open/short
Input2 may be open/short
This status is set when loop
current is set to out of 4-20
mA (generally when PV is
out of range)
Sensor 1 and Sensor 2
measured values differ by
more than a user defined
threshold
ADC reference voltages
are beyond working correct
limits
Applied Input 2 value and
measured value differ by
more than 1.5% span at
low calibration point
Applied Input 2 value and
measured value differ by
more than 1.5% span at
high calibration point
Measured value of Sensor1
is out of range
STT700 Temperature Transmitter User's Manual
This non critical flag will be set when
difference between applied Input 1 LRV value
and measured value exceeds 1.5% of span.
Perform Reset correct.
This non critical flag will be set when
difference between applied Input 1 URV value
and measured value exceeds 1.5% of span
Perform Reset correct.
MCU reference voltages are beyond limits and
hence inputs measured may not be correct.
Replace the sensor based on Input 1, Input 2
measurement suspect.
Output current is fixed and not varying as per
input. Loop current mode is disabled or Loop
Test is active.
Enable loop current mode if it is disabled or
exit the Loop Test mode if active to return to
normal operation.
There is a problem with the Input 1 sensor.
Verify sensor connections and configuration.
There is a problem with the Input 2 sensor.
Verify sensor connections and configuration.
Calculated analog output is either above or
below the specified loop current limits. The
transmitter input is not in specified range.
Check the transmitter input.
This will be set when delta value exceeds
delta limit. When Excess Delta Alarm is
disabled and device is in non-redundant mode,
this status indicates that the difference
between two sensor inputs has crossed the
applicable delta limit
Controller ADC fault. Replace device if error
persists upon power cycle.
This will be set when difference between
applied Input 2 LRV value and measured
value exceeds 1.5% of span
This will be set when difference between
applied Input 2 URV value and measured
value exceeds 1.5% of span
Input 1 temperature is greater than Sensor 1
URL or less than Sensor 1 LRL
Set when the input at first sensor is either
under range or over range
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