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)
Descriptions for J59, J60, and J61 are the same as those of PID control P (Gain) (J03), I (Integral time) (J04), and
D (Differential time) (J05), respectively.
J62
PID Control (PID control block selection)
For speed control (PID dancer control ), the output of the PID processor is the compensating value for the primary
speed command.
It is possible to switch the polarity of the PID error to the PID dancer processor with bit 0 of J62, and also switch the
output in percentage (%) of the primary speed command or in percentage (%) of the maximum frequency with bit 1
of J62.
J62 data Block selection
Decimal Bit 1 Bit 0
Select the compensating value
(the PID processor output)
format for the primary speed command
Select the polarity of
the PID error
0 0 0 In % of the primary speed command Plus(+)
1 0 1 In % of the primary speed command Minus(-)
2 1 0 In % of the maximum frequency Plus(+)
3 1 1 In % of the maximum frequency Minus(-)
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