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N700E INSTRUCTION MANUAL
4-15
Func-
code
Name
Run-
time
Edit
Description
Defaults
A80 PID Output reverse
X
Two options : select codes
0.... PID output reverse disable
1.... PID outputreverse enable
0
A81 PID scale factor
X
PID scale factor (multiplier),
0.1 to 1000% in units of 0.1%
100.0%
A82 Pre PID frequency(Note5)
X
0.0 to Max Frequency(A04) in units of 0.01Hz.
When A82 equals “0”, Pre-PID function is disabled.
0.00Hz
A83 Sleep frequency(Note6)
X
0.00 to Max Frequency(A04) in units of 0.01Hz
0.00Hz
A84 Sleep delay time(Note6)
X
0.0 to 30.0sec in units of 0.1sec
0.0sec
A85 Wake up frequency(Note6)
X
Sleep frequency(A83) to Max Frequency(A04) in
units of 0. 01Hz
0.00Hz
Note 4: PID feedback control
The PID(Proportional, Integral, Differential) control functions can apply to controlling of fan, the air (water)
amount of pump, etc., as well as controlling of pressure within a fixed value.
[Input method of target value signal and feedback signal]
Set the reference signal according to the PID reference setting method(A72).
Set the feedback signal according to analog voltage input (0 to 10V) or analog current input (4 to20mA).
To use analog current [OI-L] for the target value, set the [AT] terminal to ON.
[PID gain adjustment]
If the response is not stabilized in a PID control operation, adjust the gains as follows according to the
symptom of the inverter.
• The change of controlled variable is slow even when the target value is changed.
→ Increase P gain [A74]
• The change of controlled variable is fast, but not stable.
→ Decrease P gain[A74]
• It is difficult to make the target value match with the controlled variable.
→ Decrease I time [A75]
• Both the target value and the controlled variable are not stable.
→ Increase I time [A75]
• The response is slow even when the P gain is increased.
→ Increase D time [A76]
• The response is not stabilized due to oscillation even when the P gain is increased.
→ Decrease D time [A76]