YASKAWA T1000V Technical Manual page 122

5.2 b: Application
Using PID Control
■
Applications for PID control are listed in the table below.
Application
Machinery speed is fed back and adjusted to meet the target value. Synchronous control
Speed 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
■
When the PID control parameter b5-01 is set to 1 or 2, the frequency reference in b1-01 (or b1-15) 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 in the following table.
PID Setpoint Source
Analog Input A1
Analog Input A2
MEMOBUS/Modbus Register 0006H
Pulse Input RP
Parameter b5-19
Note: A duplicate allocation of the PID setpoint input will result in an OPE alarm.
■ PID Feedback Input Methods
Either one feedback signal can be input for normal PID control or two feedback signals can be input for controlling a
differential process value.
Normal PID Feedback
The PID feedback can be input from one of the sources listed below.
PID Feedback Source
Analog Input A1
Analog Input A2
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
Note: A duplicate allocation of the PID differential feedback input will result in an OPE alarm.
122
Description
Table 5.6 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 H6-01 = 2
Set parameter b5-18 = 1 and input the PID setpoint to b5-19
Table 5.7 PID Feedback Sources
Set H3-02 = B
Set H3-10 = B
Set H6-01 = 1
Table 5.8 PID Differential Feedback Sources
Set H3-02 = 16
Set H3-10 = 16
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Settings
Settings
Settings
Sensors Used
Tachometer
Pressure sensor
Flow rate sensor
Thermocoupler,
Thermistor