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PARAMETERS
120
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. 500 to Pr. 516
(Advanced PID control)
(NA, EC versions only)
Pr. 902 to Pr. 905
(frequency setting voltage
(current) biases and gains)
Related parameters
4.2.40 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.
#
Refer to page 145 for advanced PID control. (NA, EC versions only)
Parameter
Number
Factory
Setting
Setting Range Remarks
128 10
10, 11, 20, 21,
(30, 31 Note)
30, 31: Advanced PID control
129 100% 0.1 to 1000%, 9999 9999: No proportional control
130 1 s 0.1 to 3600 s, 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 10.00 s, 9999 9999: No differential control
Note: Setting may be made for the NA and EC versions only.
<Setting>
(
1
)
Basic PID control configuration
Pr. 128 = 10, 11
+
-
IM
Kp: Proportion constant Ti: Integral time S: Operator Td: Differential time
Set point
Deviation signal
Manipulated
variable
Motor
Feedback signal (Process value)
Inverter circuit :
Ti S
1
1+
+Td S
Kp
PID operation
Terminal 1
External
to Inverter
Pr. 128 = 20, 21
+
-
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