16
Reference Manual
00809-0100-4772, Rev FA
Configuration and Operation
March 2016
Configuration and Operation
The Units will match the XD_SCALE units of the AI Block assigned to Electronics
Temperature.
2.8 Analog Input (AI) Function Block
For information on the Analog Input (AI) Function Block, refer to Section 6.
2.8.1 Filtering
The filtering feature changes the response time of the device to smooth variations in output
readings caused by rapid changes in input. Adjust the filter time constant (in seconds) using
the PV_FTIME parameter. Set the filter time constant to zero to disable the filter feature.
Figure 2-2. Analog Input PV_FTIME Filtering
2.8.2 Low cutoff
When the converted input value is below the limit specified by the LOW_CUT parameter,
and the Low Cutoff I/O option (IO_OPTS) is enabled (True), a value of zero is used for the
converted value (PV). This option is useful to eliminate false readings when the flow
measurement is close to zero.
Note
Low Cutoff is the only I/O option supported by the AI block. Set the I/O option in Manual or
Out of Service mode only.
PV_FTIME
63% of Change
OUT (mode in man)
OUT (mode in auto)
PV
Time (seconds)
FIELD_VAL
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