Sanken SVCO6, Инструкция по эксплуатации, Страница: 214 / 326

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7-3 Description of Functions
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Start Mode of PID Control
】
F3008 Indirect PID1 input reference
F3108 Indirect PID2 input reference
F3123 PID start mode selection
The function to select the input mode for PID control.
● The direct input mode and indirect input mode can be selected by selecting the function code.
· F3123=1: direct input mode…Normal PID control.
· F3123=2: Conditional input mode.
When the conditions specified by PID command value and PID feedback value are satisfied, the PID action
will be started by switching open loop control into PID control.
Start conditions are F3008/F3108: input reference and PID command target value: Ft and feedback value: Fb.
The judgment will be as follows.
PID start condition: Fb
≧
Ft×F3008/F3108
Feedback value Fb
Command target value Ft
Input reference value = Ft

F3008/F3108
Control
value
PID input start point
Open loop control
PID control Time
Note 1: When PID control is started once the PID start conditions are satisfied, the PID control will continue even the
second start conditions are not satisfied. However, once the inverter is in stop status and other conditions will
not carry out PID control, the start operation of PID control will be carried out again according to the PID
conditions.
Note 2: When PID command value input switching is F3001/F3101=1, the frequency will be target frequency Ft under
normal mode.
【
Formation of PID Control
】
F3205 PID constitution selection
F3206 Command value addition calculation
PID control gain
The function to select the output formation of PID control.
● You can use PID control output directly as the frequency output, you can also add command frequency and PID
control output and use the summation as the frequency output.