YASKAWA AC Drive-A1000 Technical Manual page 142

5.2 b: Application
n Using PID Control
Applications for PID control are listed in the following table.
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 or 2, the frequency reference in b1-01 (or b1-15) or one of the inputs listed in
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 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 below:
PID Feedback Source
Analog Input A1
Analog Input A2
Analog Input A3
Pulse Input RP
Note: A duplicate allocation of the PID feedback input will result in an oPE alarm.
Differential Feedback
The second PID feedback signal for differential feedback can come from the sources listed below. The differential feedback
function is automatically enabled when a differential feedback input is assigned.
PID Differential Feedback Source
Analog Input A1
Analog Input A2
Analog Input A3
Note: A duplicate allocation of the PID differential feedback input will result in an oPE alarm.
142
Description
Table 5.8 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
Table 5.9 PID Feedback Sources
Set H3-02 = B
Set H3-10 = B
Set H3-06 = B
Set H6-01 = 1
Table 5.10 PID Differential Feedback Sources
Set H3-02 = 16
Set H3-10 = 16
Set H3-06 = 16
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Tachometer
Pressure sensor
Flow rate sensor
Thermocoupler,
Thermistor
Table 5.8.
Settings
Settings
Settings
Sensors Used
Table 5.8 becomes