Delta VFD015EL43W-1 - Parallel Mode; Erroneous PID Feedback Deviation Level Action; Restart Delay Time after Erroneous PID Deviation Level; Set Point Deviation Level

Chapter 4 Parameters  VFD-EL-W
4-91
P
10.02
I
10.03
D
10.04
10.05
10.10
10.07
10.06
10.01
+
-
+
+
+
Setpoint
Input Freq.
Gain
PID
feedback
Integral
gain
limit
Output
Freq.
Limit
Digital
filter
Freq.
Command
 Parallel mode
P
10.02
I
10.03
D
10.04
10.05
10.10
10.07
10.06
10.01
+
-
+
+
+
Setpoint
In put Freq.
Gain
PID
fe ed ba ck
In teg ra l
gain
limi t
Outp ut
Freq .
Limit
Digi tal
fi lte r
Fr eq .
Co mmand
10.20
Erroneous PID Feedback Deviation Level Action
Default: 0
Settings 0 Warn and keep operating
1 Warn and coast to stop
2 Warn and ramp to stop
3
4
Ramp to stop and restart after Pr.10.21 delay time (No warning displays)
Ramp to stop, and restart after Pr.10.21 delay time. The number of times of
restart is limited by Pr.10.50 (Number of Times of Restart after PID Fault)
 In PID control mode, the AC motor drive acts according to this parameter when erroneous PID feedback
deviation level occurs (Pr.10.12 and Pr.10.13).
10.21
Restart Delay Time after Erroneous PID Deviation Level Unit: 1
Settings 0–9999 sec. Default: 60
10.22
Set Point Deviation Level Unit: 1
Settings 0–100% Default: 0
10.23
Detection Time of Set Point Deviation Level Unit: 1
Settings 1–9999 sec. Default: 10
 Pr.10.22 is based on the set point set by the PID control. When the deviation is less than Pr.10.22 and the
time exceeds Pr.10.23 setting, the AC motor drive decelerates to stop to be in a standby status with
constant pressure (this deceleration time is according to the Deceleration Time 2 in Pr.01.12). If the
deviation is still in the range of the error set during deceleration to stop, the system is in standby status.
 Example: Assume that the set point of a constant pressure control for a pump is 4 kg, Pr.10.22 is set to
5%, and Pr.10.23 is set to 15 seconds, then the deviation is 0.2 kg (4 kg X 5% = 0.2 kg). When the
feedback value is higher than 3.8 kg and the time exceeds 15 seconds, the AC motor drive decelerates to
stop (this deceleration time is according to the Deceleration Time 2 in Pr.01.12). When the feedback value
is less than 3.8 kg, the AC motor drive starts to run.
10.24
 Deviation Level of Liquid Leakage Unit: 1
Settings 0–50% Default: 0