Pid Control (Pr. 128 To Pr. 134) - Mitsubishi Electric FR-A500 Instruction Manual

4.2.42 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
20mADC current input signal used as a feedback value to constitute a feedback system for PID control.
Parameter Factory
Number Setting
128 10
129 100%
130 1 s
131 9999
132 9999
133 0%
134 9999
<Setting>
(1) Basic PID control configuration
Pr. 128 = 10, 11
Set point
To external
Pr. 128 = 20, 21
Pr. 133 or terminal 2
Set point
0 to ±5
(0 to ±10)VDC
Setting Range
10, 11, 20, 21
0.1 to 1000%, 9999
0.1 to 3600 s, 9999
0 to 100%, 9999
0 to 100%, 9999
0 to 100%
0.01 to 10.00 s, 9999
Deviation signal
+ -
Terminal 1
Kp
Feedback signal (process value)
Kp : Proportional constant Ti : Integral time S : Operator Td : Differential time
Inverter circuit
+ -
Kp 1+
Terminal 4
Feedback signal (process value)
Kp : Proportional constant Ti : Integral time S : Operator Td : Differential time
137
Related parameters
Pr. 73 "0-5V/0-10V selection"
Pr. 79 "operation mode selection"
Pr. 180 to Pr. 186
(input terminal assignment)
Pr. 190 to Pr. 195
(output terminal assignment)
Pr. 902 to Pr. 905
(frequency setting voltage
(current) biases and gains)
Remarks
9999: No proportional control
9999: No integral control
9999: Function invalid
9999: Function invalid
9999: No differential control
Inverter circuit
Manipulated
PID operation
variable
1
1+ +Td S
Ti S
Manipulated
PID operation
variable
1
+Td × S
Ti × S
4 to 20mA
PARAMETERS
Motor
IM
Motor
IM
4