60
PID function summarize
This parameter is used to select the PID feedback channel .
Group F9 PID Function
PID reference signal It is the
control target of the controlled quantity.
： signal that corresponding
to
PID feedback signal It is the signal that
the controlled quantity,
it varies with process load and indicates the
control process.
： measured by sensor
and corresponding to the actual value of
actual state during
the
The differences between the actual status of the controlled quantity
and the control target will be reflected by the differences between
PID feedback and the reference signal .
According to different symbols, PID controller rises or reduces
output frequency accordingly so as to achieve the autocontrol
propose.
The built-in PID controller inverter is applicable to process
control such as fluid control , pressure control ,temperature
control and so on .
Prompt : When client needs to use the PID controller function ,
he should set the frequency source selection parameter as PID
enabled at first, which means F0.03 (F0.04)=7 .
PID control is a common method of process control . It adjusts
the output frequency through proportional , integral and
differential calculations of the difference between the
reference signal of the controlled quantity and the feedback
signal , and thus to stabilize the controlled quantity at the
target quality .
The first part of LED：
The second part of LED：
PID reference source
PID feedback source
PID reference has two expression modes：
1 PID reference source selection: when the value is 0 or 2 or
3 or 4 , PID setup value adopts percentage expression that
control target is relative to PID range , 100% PID setup
corresponding to100% feedback signal of controlled system ,
PID is not necessary at that moment . No matter how much the
range is , the system operates according to the relative value
(0 to 100%) . Once setting the PID range , you can directly
observed PID setup and the feedback corresponding signal
actual value through the operation panel display parameter .
：
This parameter decides the target quantity reference channel
of the process PID .
When using the sensor with voltage output ,you need to modify
the voltage loss of the longer signal cable. It can be realized
through setting the minimum/maximum input of AI1 and AI2
in Group F3 .
Chapter 6 Parameter Description
Output frequency
on fault
F8.13
Display the state parameter
upon fault for the latest time .
F8.14
Output current
on fault
F8.15
Terminal status expression
for fault.
Refer to the FV.15
.
details in
Bus voltage on fault
F8.16
Module temperature
on fault
Terminal state
on fault
F8.17
Factory
default value
001
F9.00
PID control mode setup
Setup range
The third part ot LED：
PID action direction
0 positive action：
1 reverse action：
The second part of LED：
PID feedback source
0AI1：
1AI2：
2 AI1+AI2：
3 AI1-AI2：
4 Min{AI1 AI2}：，
5 Max{AI1 AI2}：，
6PulsesetupDI：（）
7 Communication setup：
The first part of LED:
PID reference source
0 panel potentiometer：
1 PID digital reference (F9.02)：
2AI1：
3AI2：
4PulsesetupDI：（）
5 Communication setup：
The third part of LED：
PID action direction
Positive action: When the feedback signal is higher than the
PID reference ,
reduced to balance the PID . Such as the
winding.
the output frequency of the
inverter should be
tension PID control of
2 When PID reference source selects 1 or 5 , or PID second
digital reference enabled , PID setup value adopts absolute value
expression that control target is relative to PID range , the control
target value of controlled quantity is directly endued with
parameter F9.02 and F9.03 at this moment .
When PID setup value is equal to the range , it is corresponding
to100% feedback signal of controlled system , here PID range is
necessary, for it is the value which is the percentage relationship
of both setup value and range that takes part in PID calculation.
It means : PID setup = PID digital setup value / range *100%
The value corresponds to PID feedback percentage .
：
3 The above explanation is applcable to PID feedback of
communication setup .
：
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