YASKAWA Z1000U Technical Manual page 111

n PID Operation
To better demonstrate PID functionality,
level.
n
Using PID Control
Applications for PID control are listed in
Application
Machinery speed is fed back and adjusted to meet the target value. Synchronous control is
Speed Control
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
n PID Setpoint Input Methods
The PID setpoint input depends on the PID function setting in parameter b5-01.
If parameter b5-01 is set to 1, the frequency reference source in b1-01 or one of the inputs listed in
setpoint.
If b5-01 is set to 3, then the PID setpoint can be input from one of the sources listed in
PID Setpoint Source
Analog Input A1
Analog Input A2
Analog Input A3
MEMOBUS/Modbus Register 0006 H
Pulse Input RP
Parameter b5-19
Note: A duplicate allocation of the PID setpoint input will cause an oPE alarm.
n PID Feedback Input Methods
Input one feedback signal for normal PID control or input two feedback signals can for controlling a differential process value.
Normal PID Feedback
Input the PID feedback signal from one of the sources listed in
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Figure 5.10 illustrates the PID output when the PID input (deviation) is at a constant
PID input
D control
PID Output
Figure 5.10 PID Operation
Table 5.2.
Table 5.2 Using PID Control
Description
Table 5.3 PID Setpoint Sources
Set H3-02 = C
Set H3-10 = C
Set H3-06 = C
Set bit 1 in register 000F H to 1 and input the setpoint to register 0006 H
Set H6-01 = 2
Set parameter b5-18 = 1 and input the PID setpoint to b5-19
Time
PID output
I control
P control
Time
Table
Settings
Table 5.4:
5.2 b: Application
Sensors Used
Tachometer
Pressure sensor
Flow rate sensor
Thermocoupler,
Thermistor
Table 5.3 becomes the PID
5.3.
5
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