55
Reference Manual
00809-0100-4772, Rev FA
Transducer Block
March 2016
Transducer Block
4.2.3 Alarm detection
Alarms are not generated by the transducer block. By correctly handling the status of the
channel values, the down stream block (AI) will generate the necessary alarms for the
measurement. The error that generated the alarm can be determined by looking at
BLOCK_ERR and XD_ERROR.
4.2.4 Status handling
Normally, the status of the output channels reflects the status of the measurement value,
the operating condition of the measurement electronics card, and any active alarm
condition. In Auto mode, Primary_Value reflects the value and status quality of the output
channels.
0x04000000 FLOW_SIGNAL_INJECT: The transducer block is
receiving its flow signal from an external signal
generator.
SEnSOr OFFLN Informational only.
0x08000000 FLOW_EMULATION_MODE: The transducer block is
receiving its flow signal from the internal signal
generator.
SIGnAL SIMUL Informational only.
0x10000000 SENSOR_OVERRANGE: The transducer has detected a
flow level that exceeds the upper sensor range. The
status associated with the primary value (PV) and
secondary value (SV) should also be BAD.
FAULT PV>SL Verify process fluid
configuration. Reduce
flow to prevent damage
to the sensor.
0x20000000 PV_OVERRANGE: The transducer has detected a flow
level that exceeds the PV upper range. The status
associated with the PV and SV should also be
UNCERTAIN. The flow is still measurable, but accuracy is
not guaranteed.
Reduce flow below the PV
upper range value.
0x40000000 IN_LOW_FLOW_CUTOFF: The transducer has detected
that the flow has dropped below the configured
low-flow cutoff value. The reported flow value will now
damp to zero.
Informational only.
1. If a transmitter power reset does not clear the error message, the electronics will need to be replaced.
2. If the process temperature exceeds the specified limits of the temperature sensor, the indicated process temperature may not be within the rated
specifications of ± 2.2 °F (1.2 °C).
Table 4-4. Transducer Block Status Definitions (TB_ELECTRONICS_STATUS)
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