When frequency source is chos en to be PID, i.e. F0.03 is chosen to be 5, thes e group functions are a ctive.
This par ameter is to determine the assi gnment channel of the process PID target value.
The set target value of process PID i s a relative value , and the set 100% i s corresponding to the 100%
fee dback signal of the sys tem being controlled.
The system always pe rforms t he calcul at ion according to relative value (0-100%)
Note: If mult istage input, it can be accomplished by means of setting F4 grou p par amet er s.
When F4. 08=0 is chosen, i .e. t he ta rget source i s the keyboard, it is required to set this parameter.
The reference val ue of this para meter is the sys tem feedback value.
The PID feedback channel i s chosen by t his parame ter.
Important: The assignment channel and feedback channel can not be in coinci den ce, otherwise PID i s
unable to control effectively.
PID output i s positive charac teris tic: when the feedback s ignal is bigger tha n t he PID given s ignal, it
i s required for the invert er output frequency to decrease to count erba lance the PID, for i nstance, t he
winding t ension PID control .
PID output i s nega ti ve chara cteristic: whe n t he feedba ck s ignal is bigger t han the PID giver signal, it
i s required for the invert er output frequency to increase t o c ounterbalance the PID,for ins tance, the
unreeling tension P ID control.
F4.19
0.0%
100.0%
~
0.0 %
P reset PI D set point
Functio n
Cod e
Name
Setting Range
Default
Value
P ID Feedback
S ources Option
F4.20
0
Reserv ed
:
1
AI F eedback
:
2
Reserv ed
:
3
Communication feedbac k
:
0
Functio n
Cod e
Name
Setting Range
Default
Value
F4.2 1
P ID Output C haract eristics
Option
0
positi ve
:
1
neg ative
:
0
Functio n
Cod e
Name
Setting Range
Default
Value
F4.22
P roport ional gain (Kp)
0.00
99.99
~
1.00
F4.2 3
I ntegr al time (Ti)
0.01
10.00 s
~
0.10s
F4.24
Differential time (Td)
0.00
10.00 s
~
0.00s
Functio n
Cod e
Name
Setting Range
Default
Value
Chapter 6 Para meter Description
DZB Series
-6 0 -
This funct ion is to se t up the initiat ive bus voltage of dynami c braking, and properly regulat ing this
val ue can result in an effective brake to the load.
Speed=120
running fre quency
F4.17/pole number
This funct ion is used to cali brat e speed dis play error, it has no impact on actual speed.
×
×
PID c ontrol is one method normally used to process control, holding the cont rol value to the target
val ue by the negative feedback syst em which regulate s the inverter output frequency by means of
proportion, i ntegrat ion and differential operations on the difference bet ween the cont rol value feedback
signal and the target va lue s igna l. It is applicable to the process control s such as flow control, press ure
cont rol and temperature control and so on. The control functi onal block diagra m i s shown as fol lows:
Fig.6-18 Process PID Functi onal Block Diagram
M
F
P
Give n Value
(Percent age)
PI D Control
Output F
Fe edba ck Value
(Percenta ge )
Filt er
Function
Code
Nam e
S etting Range
D efault
Value
F 4.16
Brake Threshold
Va lue Voltage
115 .0
140.0%(s tandard DC bus
voltage) 380 V
~
130.0%
115 .0
140.0%(s tandard DC bus
voltage) 220 V
~
120.0%
F4.17
Speed display
ratio
0.1
999.9%
Speed=120
running
frequency
F4.17/po le num ber
~
×
×
100.0%
Function
Code
Nam e
S etting Range
D efault
Value
F 4.18
PID setpoint
Sources Option
0
Given by Keyb oard( F4.19)
:
1
Given by panel po tentiom ete r VI
:
2
Given ex ternal ter mi nal AI
:
3
Given by Rem ote
Co mmunic ation
:
4
Mu lti-seg s etpoint
:
0
Function
Code
Nam e
S etting Range
D efault
Value
Cha pter 6 Parameter D es cription
DZB Series
- 59-
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT
BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT BLUE ELEPHANT