Fuji Electric FRENIC MEGA G2 Series - J Codes (Applied Functions)

5.3 Description of Function Codes 5.3.8 J codes (Applied functions)
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FUNCTION CODES
Chap 5
FUNCTION
CODES
F Codes
E Codes
C Codes
P Codes
H Codes
A Codes
b Codes
r Codes
J Codes
d Codes
U Codes
y Codes
K Codes
5.3.8 J codes (Applied functions)
J01
PID control (operation 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 operation and control block.
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>
Manual speed command
Frequency
command
PID process command
PID processor
PID feedback
Fixed roll
Fixed roll
Winder
Rotational speed control
Inverter
Upper limit position
Reference position
Lower limit position
Dancer roll
Position information
e.g. 0 to 10 V
Potentiometer, etc.
Adjusts line speed with dancer
roll position as reference
Speed command
(primary reference)
Frequency command
PID command (dancer
reference position)
PID feedback (dancer
position feedback)
PID
processor
Upper limit
Lower limit