Special operation
Parameter
6 - 244
PID control basic configuration
PI action
A combination of P action (P) and I action (I) for providing a manipulated variable in response
to deviation and changes with time.
I001231E
Fig. 6-119:
System configuration when Pr. 128 = 20 or 21 (set/feedback value at the inverter)
Fig. 6-120:
Operation example for stepped changes of
measured value
I000045C
[
[
Kp 1+
+Td S
1
Ti S
•
•
Pr. 133 or
terminal 2
Kp: Proportionality constant; Ti: Integral time; S: Operator; Td: Differential time
Motor
Manipulated
variable
0–5V DC
(0–10V DC)
Feedback signal (measured value),
4–20mA DC (0–5V DC, 0–10V DC)
PID operation
Inverter
Set point
Terminal 4
t
t
t
Deviation
Set point
Measured
value
P action
I action
PI action
Summary of Contents for FR-D720S SC EC
Page 2: ......
Page 4: ......
Page 24: ...Description of the case Product checking and part identification 1 4 ...
Page 108: ...Operation panel Operation 4 20 ...
Page 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Page 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Page 504: ...Specification change Appendix A 20 ...
Page 505: ......
Page 506: ......
Page 510: ...Index Appendix A 24 ...
Page 511: ......