Diagnostic Transducer Block; Execution; Sensor - Honeywell ST700 User Manual

3.5

Diagnostic Transducer block

The Diagnostics Transducer block is used to monitor or track Process Variables (PV) of
the device. The block can be linked to any function block. The block supports several types
of diagnostics: Process Variable, Meter body, Static pressure, Calibration and Transmitter
Electronics.
ATTENTION
The PV's and core temperature diagnostics is tracked in 7 ways:
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Execution

The block has Sensor and Device diagnostics. The block is executed as follows:

Sensor

Sensor Diagnostics
Sensor Diagnostics has two components Sensor Diagnostics and Sensor Voltage
diagnostics. These are updated based on the selection in the Upload Track Data.
The device updates the PV tracking data of sensor module and processes the rest of the
diagnostic data such as electronic temperature, Time-in-Servic, etc.
PV diagnostics and Sensor Core temperature diagnostics are displayed in the Sensor
Diagnostics record based on the selection in the Upload Track Data. Maximum Value and
Minimum Value are the maximum and minimum values reached during the life time of the
device. Process Variable Unit is the engineering unit of the process variable currently
under use. The Over Range Counter is the accumulation of minutes that device's PV (or
Sensor Core temperature) has been above the value of maximum specification limit less
10% of range. (Example: for pressure for range of -800inH2O to 800inH2O, 800 inH2O –
160 inH2O = 640 inH2O). The Over Range Date is the date and time when the PV (or
Sensor Core temperature) last passed above the value of maximum specification limit less
10% of range. (Example: for pressure for range of -800inH2O to 800inH2O, 800 inH2O –
160 inH2O = 640 inH2O). Under Range Counter is the accumulation of minutes that
device's PV (or Sensor Core temperature) has been below the value of minimum
specification limit plus 10% of range. (Example: for pressure for range of -800inH2O to
800inH2O, 800 inH2O + 160 inH2O = -640 inH2O). Under Range Date is the date and
time when the PV (or Sensor Core temperature) pressure last passed below the value of
minimum specification limit plus 10% of range. (Example: for pressure for range of -
800inH2O to 800inH2O, -800 inH2O + 160 inH2O = -640 inH2O).
Revision 2.0 FOUNDATION Fieldbus ST 700 Pressure Transmitter User's Guide
Maximum in lifetime
Minimum in lifetime
Accumulated time above a limit
Accumulated time below a limit
Time stamp of last transition above a limit
Time stamp of last transition below a limit
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