Duxe.ru VICSION VS500 73
F8.2 Inner PID close-loop digital setting
If F8.1 is 0#00, setting value will be set by F8.2.
F8.3
F8.4
F8.5
F8.6
Minimum fixed value
Maximum fixed value
Feedback of minimum fixed value
Feedback of maximum fixed value
Setting range：0.0 ~ 10.00V
Setting range：0.0 ~ [F8.4]
Setting range：[F8.3] ~ 10.00
Setting range：0.0 ~ 10.00
Setting range：0.0 ~ 10.00
Parameters F8.3 and F8.4 define the upper and lower limit value of PID setting. Parameters F8.5 and F8.6 define
corresponding relation with PID feedback value. Shown as fig.6-29
Expected feedback value
[F8.6]
[F8.5]
[F8.3]
PID setting
value
[F8.4]
Fig.6-29 Relation between PID fixed value and expected feedback value
F8.7 Proportion gain
F8.8 Integral time constant
Those parameters are inner parameter of PID.
Setting range：0.0 ~ 5.00
Setting range：1.0 ~ 100 Sec
F8.9 Allowable deviation limit
Setting range：0.0 ~ 20.0(%)
The parameter is the allowable deviation value relative to the setting max value. When the difference between
feedback value and the setting value is lower than this setting value, PID controller will stop. Shown as fig.6-30.
This function is mainly suited for the system that has lower control precision and needs to avoid adjusting
frequently, for example, water-supply with constant pressure system.
f
PID action PID feedback PID setting
[F8.9]
PID action
t
Fig.6-30 PID Control allowable deviation limit
F8.10 Preset freq. for close-loop
F8.11 Holding time of preset freq. for close-loop
Setting range：0.00 ~ the upper limit freq.
Setting range：0.0 ~ 6000.0s
Those parameters define freq. and running time of inverter before actual PID control is valid. In some control systems,
inverters will forcible output a certain freq. (F8.10) and keep it in setting time (F8.11) for controlled object arrives fast
targeted value. When controlled object almost arrives targeted value, PID controller will be valid to improve response
speed.
F8.12 long-distance manometer range
Setting range：0.00～20.000Mpa
VS500 series of general purpose inverter Duxe.ru
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