This parameter functions if PI is chosen as frequency source, which
means that the selection of P0-01 is option 4. The preset channel of objective
variables for PI is determined by this parameter. The setting objective
variables of PI are relative value; the percentage of the setting(100%)
corresponds to the percentage of feedback signal(100%) in the controlled
system. And operation is proceeded by the system according to the relative
value(0~100%).
When P7-00 equals zero, PI set value will be set by this parameter.
0 : Analog channel AI1
1 : Analog channel AI2
PI feedback channel is determined by this parameter.
PI output
characteristics
options
0 : Positive
1 : Negative
Positive PI output characteristics: output frequency must be lowered
to make it balance when the value of feedback signal is greater than PI set
value, for example PI control on winding tension.
Negative PI output characteristics: output frequency must be
increased to make it balance when the value of feedback signal is greater
than PI set value, for example PI control on unwinding tension.
Integral time (I)
P7: PI control parameters
PI control is a common method to control the process. Output
frequency can be adjusted by proportion & integral operations on the
difference between the feedback signals of controlled variable and signals of
objective variables.
0 : Digital keyboard
1 : Panel potentiometer
2 : Analog channel AI1
3 : Analog channel AI2
Default: 0
P7-00
PI preset source
options
0.00~10.00V
Default:
0.00V
P7-01
PI set value
Default: 0
P7-02
PI feedback
source options
Default: 0
P7-03
Default:
1.0
P7-04
Proportional
gain (P)
0.0~10.0
P7-05
0.0~100.0s
Default:
0.1s
Proportional gain (P) determines the intensity of adjustment of PI
regulator; the larger P value is, the higher the intensity of adjustment will be.
PI is the most common control method for process control; the
function of each part is different from each other's. Please refer to the
following brief introduction of operating principles and regulation methods:
Integral time (I): when there is difference between feedback value
and set value, regulating variable of output should be accumulated
continuously; if the deviation can't be eliminated, the regulating variable
should be increased continuously until there is no deviation. Deviation can be
eliminated effectively by integral controller. However, overshoot may be
caused repeatedly if the adjustment of integral controller is too much, which
makes system unstable and even causes vibration. If vibration is caused by
excessive integral action, following characteristics can be observed-
oscillation of feedback signal on given quantity, expanding amplitude of
oscillation, even vibration. The parameter of integral time should be adjusted
generally from maximum value to minimum value so that the integral time
can be changed gradually. Observation should be made on the effect on the
system. Adjustment can't be stopped until the sable speed of system meets
the requirements.
Proportional gain (P): There will be proportional adjustment between
output and deviation if there is difference between feedback value and set
value; if deviation is constant, regulating variable is also constant.
Proportional control responses to the change of feedback quickly; however,
error control can't be proceeded only by proportional control. The greater
proportional gain is, the smaller adjusting speed of system will be. But the
proportional gain is excessive, it may cause vibration. The adjustment
method is to extend the integral time and make system running only by
proportional control; meanwhile, set value should be changed in order to
observe its stable deviation(static error) between feedback signal and given
quantity; if static error is in compatible with the change of given quantity,
proportional gain can be increased continuously, for example increasing
given quantity, or feedback quantity is always less than given quantity after
system is stable; otherwise, please reduce it. The instruction above should
be implemented repeatedly until deviation is optimized/minimized(tips: zero
offset is almost impossible).
Integral time (I) determines the speed of integral regulation on the
difference between PI feedback quantity and given quantity. The less integral
time is, the higher the intensity of adjustment will be.
55
54
Pd: Communication parameter
Parameter
Name
Setting Range
Default
Prope-
rty
Modbus
Address
Fun-
ction
Code
Pd-00
Baud rate
5005
Pd-01
Data Format
0
Pd-02
Local address
1〜247, 0 Broadcast address
1
Pd-03
Response
delay
0ms〜20ms
2
Pd-04
Communi-
cation timeout
0.0
Pd-05
Data transfer
format
selection
30
Pd-06
Communi-
cation read
current
resolution
0
Pd-08
CANlink
communi-
cation timeout
0
Ones place : MODBUS
0 : 300BPS 1 : 600BPS
2 : 1200BPS 3 : 2400BPS
4 : 4800BPS 5 : 9600BPS
6 : 19200BPS 7 : 38400BPS
8 : 57600BPS 9 : 115200BPS
Tens place : Profibus-DP
0 : 115200BPs 1 : 208300BPs
2 : 256000BPs 3 : 512000Bps
(Hundreds place : Reserved)
Thousands place : CANlink
Baud rate
0 : 20 1 : 50 2 : 100
3 : 125 4 : 250 5 : 500
6 : 1M
0 : no checking(8-N-2)
1 : even checking(8-E-1)
2 : odd checking(8-O-1)
3 : no checking(8-N-1)
0.0 (Invalid)
0.1s~60.0s
Ones place :
0 : Non-standard MODBUS
protocol
1 : Standard MODBUS protocol
0 : 0.01A
1 : 0.1A
0.0s : Invalid
0.1~60.0s
PE: Customized function code
Parameter
Name
Setting Range
Default
Prope-
rty
Modbus
Address
Fun-
ction
Code
PE-00
User function
code 0
U3-17
PE-01
User function
code 1
U3-16
PE-02
User function
code 2
P0.00
Res-
erved
Reserved Reserved
PE-28
User function
code 28
P0.00
PE-29
User function
code 29
P0.00
P0-00~PP-XX
A0-00~AX-XX
U0-XX~U0-XX
U3-00~U3-XX
PP: Function code management
Fun-
ction
Code
Parameter
Name
Setting range
Default
Prope-
rty
Modbus
Address
PP-00
User password
0〜65535 0
PP-01
Parameter
initialization
0
●
PP-02
Function
parameter
group display
selection
11
●
PP-03
Personality
parameter
group display
selection
00
PP-04
Parameter
modification
property
0 : Can be modified
1 : Cannot be modified
0
0 : no operation
1 : Restore factory value,
excluding motor parameters
2 : Clear record information
3 : Restore factory values,
including motor parameters
4 : Backup user current
parameters
501: Restore user backup
parameters
Ones place : U group display
0 : not displayed
1 : display
Tens place : A group display
0 : not displayed
1 : display
Ones place : User customization
0 : Do not display
1 : Display
Tens place : User change
0 : Do not display
1 : Display
User Manual
Chapter 5
User Manual
Chapter 5
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