Saftronics FP5 Series User Manual page 67

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Intended
Value
(Deviation) -
n085
Feedback
Calibration
Gain
Detected
Value
D
+
n088
Z
-1
Notes:
1) Value I is reset to"0" in the following cases:
· When operation stops
· When the integral value reset signal is input by multi-function contact input
selection (Any of parameters n036 to n040 are set to "PID I Reset").
2) The upper limit of value I can be set by parameter n089.
Increase the value of parameter n089 to upgrade control capability by integration.
If the control system vibrates and it cannot be stopped by adjusting the integral
time, output lag filter time, etc., decrease the set value of parameter n089.
3. PID control can be canceled by a multi-function contact input signal.
By setting any of parameters n036 to n040 to "PID Disable" and by closing
the contact during running, PID control is disabled and the setpoint value sig-
nal itself is used as a frequency reference signal.
4. Inverse PID characteristics can be obtained by setting parameter n093 to
"Inverted".
5. The PID Sleep feature can be used to automatically turn off the inverter output
when the PID output value falls below the sleep function level (n094) for
longer than the sleep function time (n095). The inverter will resume normal
operation when the PID output is greater than the sleep level for longer than
the sleep time. Setting parameter n094 to "0.0" disables this feature.
PID Output
Internal RUN
Command
RUN Command
During Run
FP5/GP5 User's Manual
Chapter 3 - Programming Features
+
P
±109%
+ +
I Limit
+
n084
n089
n087
1
or 3
1
D
+
n088
2
2
3
n084
Figure 35a PID Control Block Diagram
n095
Figure 35b PID Control Timing Chart
FP5/GP5 Operation
0
n093
0
Sleep
Limit
Function
1
n094, n095
1, 2, or 3
n084
Inverted
Characteristic
Enabled
(Sleep Level)
n094
(Sleep Time)
n095
Stays High
Stays High
Frequency
Reference
67