PARAMETERS
134
Pr. 73 "0-5V/0-10V selection"
Pr. 79 "operation mode selection"
Pr. 180 to Pr. 183 (input
terminal function selection)
Pr. 191 to Pr. 192 (output
terminal function selection)
Pr. 902 to Pr. 905 (frequency
setting voltage (current)
biases and
gains)
Related parameters
"
"
PID control (Pr. 128 to Pr. 134)
4.2.37 PID control (Pr. 128 to Pr. 134)
Pr. 128 "PID action selection"
Pr. 129 "PID proportional band"
Pr. 130 "PID integral time"
Pr. 131 "upper limit"
Pr. 132 "lower limit"
Pr. 133 "PID action set point for PU operation"
Pr. 134 "PID differential time"
The inverter can be used to exercise process control, e.g. flow rate, air volume or
pressure.
!!!!
The voltage input signal (0 to
±
5V or 0 to
±
10V) or Pr. 133 setting is used as a set
point and the 4 to 20mA DC current input signal used as a feedback value to
constitute a feedback system for PID control.
Parameter
Number
Factory
Setting
Setting Range
Remarks
128
0
0, 20, 21
129
100%
0.1 to 1000%, 9999
9999: No proportional control
130
1s
0.1 to 3600s, 9999
9999: No integral control
131
9999
0 to 100%, 9999
9999: Function invalid
132
9999
0 to 100%, 9999
9999: Function invalid
133
0%
0 to 100%
134
9999
0.01 to 10.00s, 9999
9999: No differential control
<Setting>
(1) Basic PID control configuration
+-
IM
Kp: Proportion constant Ti: Integral time S: Operator Td: Differential time
Set point
Manipulated
variable
Motor
Feedback signal (Process value)
Inverter circuit :
Ti S
1
1+
+Td S
Kp
PID operation
Terminal 4
Pr. 133 or Treminal 2