YASKAWA FSDrive-MV1000 Parameter Manual page 116

2.2 b: Application
PID Operation
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To better demonstrate how PID works, the diagram below shows how the PID output changes when the PID input
(deviation) jumps from 0 to a constant level.
Figure 2.15
Using PID Control
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Applications for PID control are listed in
Application
Machinery speed is fed back and adjusted to meet the target value.
Speed Control
Synchronous control is performed using speed data from other machinery as the target value
Pressure Maintains constant pressure using pressure feedback.
Fluid Control Keeps flow at a constant level by feeding back flow data.
Temperature
Maintains a constant temperature by controlling a fan with a thermostat.
Control
PID Setpoint Input Methods
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The PID setpoint input depends on the PID function setting in parameter b5-01.
If parameter b5-01 is set to 1 or 2, the frequency reference in b1-01 (or b1-15) or one of the inputs listed in
becomes the PID setpoint.
If b5-01 is set to 3 or 4, then the PID setpoint can be input from one of the sources listed in
PID Setpoint Sources
Analog input 1
Analog input 2
MEMOBUS/Modbus Register 0006H
Parameter b5-19
Note: A duplicate allocation of the PID setpoint input will cause an oPE alarm.
PID Feedback Input Methods
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Input one feedback signal for normal PID control, or two feedback signals to control a differential process value.
Normal PID Feedback
The PID feedback signal can be input from one of the sources listed in
PID Feedback Source
Analog input 1
Analog input 2
Note: A duplicate allocation of the PID feedback input will result in an oPE alarm.
116
PID input
D control
PID Output
Figure 2.15 PID Operation
Table 2.8.
Table 2.8 Using PID Control
Description
Table 2.9 PID Setpoint Sources
Set H3-02 = C
Set H3-10 = C
Set bit 1 in register 000FH to 1 and input the setpoint to register 0006H
Set parameter b5-18 = 1 and input the PID setpoint to b5-19
Table 2.10 PID Feedback Source
Set H3-02 = B
Set H3-10 = B
Time
PID output
I control
common_TMonly
P control
Time
Setting
Table 2.10.
Setting
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Sensors Used
Tachometer
Pressure sensor
Flow rate sensor
Thermocoupler, Thermistor
Table 2.9
Table 2.9.