Powtran PI500 series - Page 113

Chapter 5 Function parameter
109
Chapter 5
PID Output
control amount
P
Td*s+1
1
Target
amount -
+
Feedback amount
Ti
1
S
1
Diagram 5-32:Flow diagram of process PID principle
Code
Parameter name
Setting range
Factory
setting
Change
limits
E2.00
PID setting source
E2.01 setting
0
0
☆`
Analog AI1 reference
1
Analog AI2 reference
2
Panel potentiometer setting
3
High-speed pulse setting
4
Communications reference
5
Multi-stage command reference
6
Analog AI3 reference
7
E2.01
PID keyboard reference
0.0% to 100.0%
50.0%
☆
This parameter is used to select the process PID target value reference channel.
The set target value of process PID is a relative value, the setting range is from 0.0% to
100.0%. The feedback value of PID is also a relative value, the role of PID is to remain the same
for the two relative values.
E2.02
PID feedback source
Analog AI1 reference
0
0
☆
Analog AI2 reference
1
Panel potentiometer setting
2
AI1-AI2 reference
3
High-speed pulse setting
4
Communications reference
5
AI1+AI2 reference
6
MAX(|AI1|, |AI2|) reference
7
MIN (|AI1|, |AI2|) reference
8
Analog AI3 reference
9
This parameter is used to select the process PID feedback signal channel.The feedback value
of process PID is also a relative value, the setting range is from 0.0% to 100.0%.
E2.03
PID action direction
Positive
0
0
☆
negative
1
E2.04
PID reference feedback range
0 to 65535
1000
☆
PID reference feedback range is a dimensionsless unit for PID setting display(d0.15) and PID
feedback display(d0.16).
The 100.0% of the relative value of PID reference feedback corresponds to a setting feedback
range(E2.04). If E2.04 is set to 2000, when PID setting is 100.0%, PID setting display(d0.15) will
be 2000.
E2.05
PID inversion cutoff frequency
0.00 to F0.19(maximum frequency)
0.00Hz
☆
In some cases, only when the PID output frequency is negative (i.e.the inverter reverses), PID
can control the reference value and the feedback value to the same states, but the excessive
inversion frequency is not allowed in some occasions, E2.05 is used to the upper limit of
determine inversion frequency.