- 68 -
Character,
Factory Default
Setting Item, Function, Setting Range
PV filter time constant
• Sets PV filter time constant.
If the value is set too high, it affects control results due to the delay of
response.
[PV filter time constant]
This is a filter function on the software, which has the same effect as a CR
filter. By calculating first-order lag of PV, this suppresses input fluctuation
caused by noise.
When the input value changes as shown in (Fig. 7.5.1-1), this function
makes the input change slowly, as shown in (Fig. 7.5.1-2).
T (PV filter time constant) is the time when input change reaches 63% of the
desired PV.
(Fig. 7.5.1-1)
(Fig. 7.5.1-2)
• Setting range:
0.0 to 100.0 seconds
At this stage, settings of Input parameter setting group are complete.
If the
and
keys are pressed at the same time, the unit returns to the Engineering setting
group.
By pressing the
key, the unit returns to RUN mode.
100%
63%
T
