<3. Parameter Setting >
3-25
IM 01C50T01-02EN
• Setting example of time constant (AO damping)
Input: Single input
High alarm level: 90%
Low alarm level: 10%
Upper control level: 80%
Lower control level: 20%
Upper Permissible fluctuation rate
= (High alarm level - Upper control level) /
(PV% upper limit - Upper control level)
= (90 - 80) / (110 - 80)
= 33.3 (%)
Lower Permissible fluctuation rate
= (Lower control level - Low alarm level) /
(Lower control level - PV% lower limit)
= (20 - 10) / (20 - (-2.5))
= 44.4 (%)
Permissible fluctuation rate
= min (Upper permissible fluctuation rate,
Lower permissible fluctuation rate)
= min (33.3, 44.4)
= 33.3 (%)
See Table 3.3 and set the time constant to 3
seconds or more to satisfy the fluctuation rate
<33.3 (%).
NOTE
It is recommended to set the sensor damping
(Sns1 Damp, Sns2 Damp, Term Damp) to 0
seconds.
If enabled, duplicate dumping function works.
