Instruction manual

135
4
PARAMETERS
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.
* "50, 51, 60, 61" can be set when used with the FR-E5NL.
<Setting>
(1) Basic PID control configuration
Parameter
Number
Factory
Setting
Setting Range Remarks
128 0 0, 20, 21, 50, 51, 60, 61 *
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
Pr. 73 "0-5V/0-10V selection"
Pr. 79 "operation mode selection"
Pr. 180 to Pr. 183 (input
terminal function selection)
Pr. 190 to Pr. 192 (output terminal
function selection)
Pr. 902 to Pr. 905 (frequency
setting voltage (current)
biases and gains)
Related parameters
+
-
IM
Kp: Proportion constant Ti: Integral time S: Operator Td: Differential time
Set point
0 to ±5 (0 to ±10) VDC
Manipulated
variable
Motor
Feedback signal (Process value) 4 to 20mADC
Inverter circuit :
Ti S
1
1+
+Td S
Kp
PID operation
Terminal 4
Pr. 133 or Treminal 2
M4500E.book 135 ページ ２００５年２月２２日 火曜日 午後５時７分