Panasonic AFPE224300 User Manual page 72

- Descriptions of parameters
1. Control mode: [S]
Select the type of PID processing and auto-tuning ON/OFF using the H constants.
Derivative type
(PI-D)
Proportional-derivative
type (I-PD)
Auto-tuning
The optimum values for the Kp, Ti, and Td of the PID parameters can be measured by checking
the process response. When auto-tuning is executed, the estimated results are reflected in the
parameter area after auto-tuning has been completed. (There may be cases in which auto-tuning
cannot be executed, depending on the process. If this happens, a value returns to the original
parameter operation value.)
Reverse and forward operations
When a process has been changed, whether the output will be increased or decreased can be
determined.
Reverse operation: When the measured process value decreases, the output will be boosted.
(Example: heating, etc.)
Forward operation: When the measured process value increases, the output will be boosted.
(Example: cooling, etc.)
Derivative type (PI-D) and Proportional-derivative type (I-PD)
When the set value is changed, the output changes.
Derivative type (PI-D): When a set value is changed, fluctuation in the output is large, however,
convergence is fast.
Proportional-derivative type (I-PD): When a set value is changed, fluctuation in the output is
small, however, convergence is slow.
2. Set value (SP): [S + 1]
Set the target value (temperature set value) within the following range which determines the
amount of process control.
K0 to K10000
3. Measured value (PV): [S + 2]
Set the current process control value (temperature data WX1 and WX2) within the following range.
K0 to K10000
4. Output value (MV): [S + 3]
The result of PID processing is stored. Use the PWM output function to output it to the process.
K0 to K10000
5. Output lower limit value: [S + 4]
K0 to K9999 (< upper limit value)
6. Output upper limit value: [S + 5]
K1 to K10000 (> lower limit value)
Specify the range of the output value (MV). The values specified for the range are output.
The limits should be as follows;
0 ≤ Output lower limit value < Output upper limit value ≤ 10000
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Control mode
Reverse operation
Forward operation
Reverse operation
Forward operation
Value of [S]
Auto-tuning: Not executed
H0
H1
H2
H3
Auto-tuning: Executed
H8000
H8001
H8002
H8003