Fuji Electric FRENIC-Ace series, Руководство пользователя

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5.3 Description of Function Codes
5-197
FU
NCT
IO
N
C
O
DE
S
Chap 5
5.3.8 J codes (Applied functions)
J01 PID control (Mode selection)
Under PID control, the inverter detects the state of a control target object with a sensor or similar device and
compares it with the commanded value (e.g., temperature control command). If there is any deviation between
them, PID control operates so as to minimize it. That is, it is a closed loop feedback system that matches a
controlled variable (feedback amount).
PID control expands the application area of the inverter to process control (e.g., flow control, pressure control, and
temperature control) and speed control (e.g., dancer control).
If PID control is enabled (J01 = 1, 2 or 3), the frequency control of the inverter is switched from the drive frequency
command generator block to the PID command generator block.
■
Mode Selection (J01)
J01 selects the PID control mode.
J01 data Function
0 Disable
1 Process control (normal operation)
2 Process control (inverse operation)
3 Speed control (dancer control)
<PID process control block diagram>
<PID dancer control block diagram>
PID process command
PID feedback
PID processor
Frequency
command
Fixed roll
Fixed roll
Upper limit position
Reference position
Lower limit position
Dancer roll
e.g. 0 to 10 V
Potentiometer, etc.
Winder
Rotational speed control
Inverter
Speed command
(primary reference)
PID feedback (dancer
position feedback)
PID
processor
Upper limit
Lower limit
Frequency command