BENSHAW RSi GM2 Series - PID Control; Basic PID Operation

Learning Advanced Features
108
890054-00-00
GM2 Series VFD
PID Control
Pid control is one of the most common automatic control methods. It uses a combination of
proportional, integral, and differential (PID) control that provides effective control for automated
systems.
The functions of PID control can be applied to the inverter operation for control of the following:
Code
Function
Speed control
Control speed by using feedback of the existing speed
comparing it to a target speed. The inverter adjusts the output
to maintain a constant speed (the target speed).
Pressure Control
Control pressure by using feedback of the existing pressure
comparing it to a target pressure. The inverter adjusts the
ouput to maintain a constant pressure.
Flow Control
Control flow by using feedback of the existing flow comparing
it to a target flow. The inverter adjust the output to maintain a
constant flow.
Temperature Control
Control temperature by using feedback of the existing
temperature comparing it to a target temperature.The inverter
adjusts the output to maintain a constant temperature.
Basic PID Operation
PID operates by controlling the output frequency of the inverter in automated process control
systems to maintain speed, pressure, flow, and temperature.
Group
Code
Name
Setting
Setting Range
Unit
AP
01
Application function
selection
2
Proc PID
0–2
-
16
PID output monitor
-
-
-
17
PID reference monitor
-
-
-
18
PID feedback monitor
-
-
-
19
PID reference setting
50.00
-100.00–100.00
%
20
PID reference source
0
Keypad
0–7
-
21
PID feedback source
0
V1
0–6
-
22
PID controller proportional
gain
50.0
0.0–1000.0
%
23
PID controller integral time
10.0
0.0–200.0
sec
24
PID controller differential
time
0
0–1000
ms
25
PID controller feed-forward
compensation gain
0.0
0–1000
%
26
Proportional gain scale
100.0
0.0–100.0
%
27
PID output filter
0
0–10000
ms
29
PID upper limit frequency
60.00
-300.00–300.00
Hz
30
PID lower limit frequency
0.5
-300.00–300.00
Hz
32
PID output scale
100.0
0.1–1000.0
%
33
PID output inverse
0
No
0–1
-