
High
−
level Instructions
3
−
763
Explanation of parameters
1
Control mode
[S]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select the type of PID processing and auto-tuning on/off with the H constants.
Control mode
Value of [S]
Auto
−
tuning
when not executed
Auto
−
tuning
when executed
Derivative type
Reverse operation
H0
H8000
Forward operation
H1
H8001
Proportional
−
derivative type
Reverse operation
H2
H8002
derivative type
Forward operation
H3
H8003
Auto-tuning
The optimum values for the Kp, Ti, and Td of the PID parameters can be measured by measuring 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, processing returns to the original parameter operation.)
For precautions concerning execution of auto tuning, refer to the following page.
Reverse operation and forward operation
These parameters determine whether the output will increase or decrease when a change occurs in the
process.
Reverse operation
If the measured process value decreases, the output will increase. (Example: Heating)
Forward operation
If the measured process value increases, the output will increase. (Example: Cooling)
Derivative type PID and proportional
−
derivative type PID
When the set value is changed, the output changes.
Derivative type
In general this produces a large change when a set value is changed, however, convergence is fast.
Proportional
−
derivative type
In general this produces a small change when a set value is changed, however, convergence is slow.
2
Set value (SP)
[S+1]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set the target value which determines the amount of process control within the following range.
K0 to K10000
3
Measured value (PV)
[S+2]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input the current process control value with the A/D converter. Adjust so that it falls within the following range.
K0 to K10000
4
Output value (MV)
[S+3]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The result of PID processing is stored. Use the D/A converter or other device to output it to the process.
K0 to K10000
5
Output lower limit value
[S+4]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K0 to K9999 (< upper limit value)
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
Содержание FP-E
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Страница 110: ...Relays Memory Areas and Constants 1 86 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 111: ...Chapter 2 Basic Instructions Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
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Страница 264: ...Basic Instructions 2 154 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 265: ...Chapter 3 High level Instructions Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 266: ...High level Instructions 3 2 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
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Страница 1053: ...Chapter 4 Precautions Concerning Programs Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
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Страница 1088: ...Precautions Concerning Programs 4 36 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
Страница 1089: ...Chapter 5 Appendix Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com ...
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