5.3 Description of Function Codes 5.3.8 J codes (Applied functions)
PID Control (Detection width of dancer position error)
PID Control (P (Gain) 2, I (Integral time) 2 and D (Differential time) 2)
When the feedback value of dancer roll position comes into the range of “Detection width of dancer position error
(J58)” the inverter switches PID constants from the combination of J03, J04 and J05 to that of J59, J60 and J61,
respectively in its PID processor. Giving a boost to the system response by raising the P gain may improve the
system performance in the dancer roll positioning accuracy.
PID Control (Detection width of dancer position error) (J58)
J58 specifies the bandwidth in the range of 1 to 100 %. Specifying “0” does not switch PID constants.
PID control P (Gain) 2 (J59)
PID control I (Integral time) 2 (J60)
PID control D (Differential time) 2 (J61)
These are the same as PID control P (Gain), I ( Integral time), and D (Differential time) (J03, J04, J05).
PID control (PID control block selection)
It is possible to select whether to add dancer control PID regulator output to the main settings, or subtract it from
the main settings. It is also possible to select whether to compensate the main settings with a ratio, or with an
absolute value (Hz) for PID regulator output.
Operation for main settings
Winding/unwinding selection
The frequency compensation direction differs depending on whether winding or unwinding is being performed.
Set J62: bit 0 = 0 for winding, and J62: bit 0 = 1 for unwinding.
J57
J57
[C1][V2][12]
[C1][V2][12]
Dancer rises above intermediate position:
Winding speed is too fast
Reduce the winding speed.
Dancer drops below intermediate position:
Winding speed is too slow
Increase the winding speed.
Dancer rises above intermediate position:
Unwinding speed is too slow
Increase the unwinding speed.
Dancer drops below intermediate position:
Unwinding speed is too fast
Reduce the unwinding speed.
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