
150
Reference Manual
00809-0100-4021, Rev GC
Section 4: F
OUNDATION
fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
Table 4-4. Resource Block RB.FD_EXTENDED_ACTIVE
4.6
Sensor transducer block
Note
When the engineering units of the XD_SCALE in the associated AI Block are selected, the
engineering units in the Transducer Block change to the same units.
THIS IS THE ONLY WAY TO CHANGE THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER
BLOCK.
Damping
Damping values may be used for, and should equal, the update rate for Sensor 1, Sensor 2, and
sensor differential. Sensor configuration automatically calculates a damping value. The default
damping value is 5 seconds. Damping may be disabled by setting the parameter damping value
to 0 seconds. The maximum damping value allowed is 32 seconds.
An alternate damping value may be entered with the following restrictions.
1.
Single sensor configuration
50 Hz or 60 Hz line voltage filters have a minimum user-configurable damping value
of 0.5 seconds
2.
Dual sensor configuration
50 Hz line voltage filter a minimum user-configurable damping value of 0.9 seconds
60 Hz line voltage filter a minimum user-configurable damping value of 0.7 seconds
The damping parameter in the transducer block may be used to filter measurement noise. By
increasing the damping time, the transmitter will have a slower response time, but will decrease
the amount of process noise that is translated to the Transducer Block Primary Value. Because
both the LCD display and AI Block get input from the transducer block, adjusting the damping
parameter affects the values passed to both blocks.
Note
The AI block has a filtering parameter called PV_FTIME. For simplicity, it is better to do filtering
in the transducer block as damping will be applied to primary value on every sensor update. If
filtering is done in AI block, damping will be applied to output every macrocycle. The LCD
display will display value from Transducer block.
RB.DETAILED_STATUS
Description
Sensor Transducer block error
Active when any SENSOR_DETAILED_STATUS bit is on
Manufacturing Block integrity error
The manufacturing block size, revision, or checksum is
wrong
Hardware/software incompatible
Verify the manufacturing block revision and the hardware
revision are correct/compatible with the software revision
Non-volatile memory integrity error
Invalid checksum on a block of NV data
ROM integrity error
Invalid application code checksum
Содержание Rosemount
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