Index
MENU
MENU
MENU
MENU
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[Unit] Access Default
Min/Max
Format Reg.Mode Level Ipa
Parameter Name
Description
ARTDrive V2 series - Instruction Manual
Chapter 6 Parameter • 297
APPL CFG / PI control
Setting of the Starting Diameter
By selecting
O03.47 - PID MltPI sel mon
= 0, when the PI block is disabled (
O03.00 - PID
PI enab src
= 0), the last value of the calculated integral component is kept into memory.
Such integral component is displayed in
O03.44 - PID PI out
(it corresponds to the winder
diameter).
When the block is enabled again, the regulation starts from the calculated value.
The same function is foreseen also in case the drive stops.
This operative method can be used, when, by controlling, for example, a winder, it is
necessary to stop the machine, to disable the drive or to disconnect the switchboard.
By selecting
O03.47 - PID MltPI selmon
= 1-2-3, when the
PI block
is disabled, the
value of the
O03.44 - PID PI out
output is the same as the one of the set parameter.
When the Drive is stopped and then started again, the previously stated value is
automatically reset only if , during the power supply, the digital input, set as
O03.00 - PID
PI enab src
, is already at a high level.
APPL CFG / PI control
Gain Increase at the Starting
When
O01.21 - PID FF mon
is lower than
O03.14 - PI steady thr
, the integral regulation
is frozen and the proportional gain gets the value set in
O03.26 - PI Pinit gain
.
When
O01.21 - PID FF mon
overcomes the threshold, the integral regulation is enabled
with the gain set in
O03.27 - PI Iinit gain
.
The PI block keeps the
O03.26 - PI Pinit gain
and
O03.27 - PI Iinit gain
gains for the
time set via
O03.13 - PI steady delay
. After this time, the gain values are brought
respectively to those generated by the gain adaptive.
APPL CFG / PI control
PI Clamp Top and Bottom Setting
As previously stated,
O03.44 - PID PI out
is used as a multiplicative factor of the feed-
forward in order to obtain the motor angular speed reference; in case the PID function is
used to control a winder/unwinder, its value is inversely proportional to the winder
diameter.
By winding with a constant peripheral speed, it is possible to write that:
ϖ
0
φ
0
=
ϖ
1
φ
1
where:
ϖ
0
= angular speed with a minimum diameter
φ
0
= minimum diameter
ϖ
1
= angular speed with the present diameter
φ
1
= present diameter
ϖ
1
=
ϖ
0
x (
φ
0
/
φ
1
)
By tuning the drive properly,
ϖ
0
corresponds to a wrong feed-forward, therefore
O03.44 -
PID PI out
depends on (
φ
0
/
φ
1
). It is possible to write that:
O03.44 - PID PI out
= (
φ
0
/
φ
1
)
This formula can be used to check the right tuning execution when the system is active
or during the procedure for the calculation of the starting diameter.
Содержание ARTDrive Vector V2 400Vac Series
Страница 1: ...Instruction Manual ARTDrive ARTDrive Vector AC Drives V2 series 400Vac Class 575Vac Class...
Страница 14: ...0 14 Chapter 0 Safety Precautions ARTDrive V2 series Instruction manual...
Страница 40: ...40 Chapter 3 Installation Guidelines ARTDrive V2 series Instruction Manual...
Страница 92: ...92 Chapter 5 Quick Start Up Guide ARTDrive V2 series Instruction Manual...
Страница 358: ...358 Chapter 8 Appendix ARTDrive V2 series Instruction Manual...
Страница 376: ...Chapter 9 Pick Lists 376 ARTDrive V2 series Instruction manual...