SIEPCYEUOQ2V01A Q2V Technical Manual
467
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PID Control Operation
This figure shows PID control operation. The modified output (output frequency) changes when the drive uses
PID control to keep the deviation (the difference between the target value and the feedback value) constant.
Figure 12.28 PID Control Operation
■
PID Control Applications
This table shows applications for PID control.
Table 12.12 PID Control Applications
Application
Control Content
Sensors Used
Speed Control
•
The drive uses a feedback signal for the machine
speed, and adjusts that speed to align with the target
value.
•
The drive uses speed data from other machinery as the
target value to do synchronous control. The drive then
adds that target value to the feedback from the
machine it is operating to align its speed with the other
machinery.
Tacho generator
Pressure control
The drive uses feedback from the actual pressure to hold
constant pressure.
Pressure sensor
Flow control
The drive uses feedback from the actual flow to hold
constant flow.
Flow rate sensor
Temperature control
The drive uses feedback from the actual temperature to
control a fan and hold constant temperature.
Thermocoupler, thermistor
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Input Methods for the PID Setpoint
Use
b5-01 = 1 [PID Enable = Enabled]
and
b5-70 to b5-72
to select how the PID setpoint is input to the drive.
When
b5-70 = 0 [PID MainRefMode = PID only]
or
b5-70 = 1 [Fref + PID] and b5-72 = 0 [PID D-FF Mode =
D=Fdback]
, either the frequency reference set in
b1-01 [Freq. Ref. Sel. 1]
or
b1-15 [Freq. Ref. Sel. 2]
will be the
PID setpoint, or the one of the inputs in
will be the PID setpoint.
When
b5-70 = 1 [Fref + PID]
or
b5-70 = 1 [Fref + PID] and b5-72 = 1 [D=Fdback]
, one of the inputs in
will be the PID setpoint.
Table 12.13 Input Methods for the PID Setpoint
Input Methods for the PID Setpoint
Setting Value
MFAI terminal AI1
Set
H3-02 = 10 [AI1 Function Selection = PID SetPoint]
.
MFAI terminal AI2
Set
H3-10 [AI2 Function Selection] = 10
.
Modbus register 0006H
Sets Modbus register 000FH (Control Selection Setting) bit 1 to 1 (PID setpoint input).
Enters the PID setpoint to Modbus register 0006H (PID Target, 0.01% units, signed).
Pulse train input terminal DI
Set
H6-01 = 2 [PI Pulse Train Function = PID SP Value]
.
b5-19 [PID Setpoint Value]
Set
b5-18 = 1 [b5-19 PID SP Selection = Enabled]
. Enters the PID setpoint to
b5-19
.
Note:
If you set two inputs for the PID setpoint, it will trigger operation error
oPE07 [Analog Input Selection Error]
.
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Entering the PID Feedback Value
You can use two methods to input the PID feedback value to the drive. One method uses a single feedback signal
for usual PID control. The other method uses two signals. The difference between those signals sets the deviation.
•
Use a single feedback signal.
Summary of Contents for Q2V Series
Page 2: ...This Page Intentionally Blank 2 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 12: ...12 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 18: ...i 2 Legal Information 18 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 26: ...1 2 Features and Advantages of Control Methods 26 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 38: ...2 8 Installation Methods 38 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 70: ...3 3 Main Circuit Wiring 70 SIEPCYEUOQ2V01A Q2V Technical Manual Models B006 B012...
Page 102: ...3 17 Motor Application Precautions 102 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 138: ...4 12 Test Run Checklist 138 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 144: ...5 2 European Standards 144 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 145: ...Standards Compliance 5 5 2 European Standards SIEPCYEUOQ2V01A Q2V Technical Manual 145...
Page 146: ...5 2 European Standards 146 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 266: ...7 10 Troubleshooting Without Fault Display 266 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 284: ...8 6 Storage Guidelines 284 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 312: ...10 10 Peripheral Devices and Options 312 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 430: ...11 21 Parameters Changed by PM Motor Code Selection 430 SIEPCYEUOQ2V01A Q2V Technical Manual...
Page 731: ...SIEPCYEUOQ2V01A Q2V Technical Manual 731 Z Z pulse Auto Tuning 125...