Fuji Electric Frenic lift, Справочное руководство

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Notes for accurate landing in a creepless operation
(1) Even if a creepless operation is programmed in accordance with the instructions given on the
previous pages, the landing position may not be level with the floor. If it happens, use L34 to
adjust the moving distance.
(2) The moving distance accuracy in a creepless operation is not guaranteed since it has a
relationship with the elevator speed.
The speed control accuracy is the maximum speed -0.01 to 0.01%. Use the accuracy as a guide
in programming the creepless operation.
(3) If it is not possible to accurately set the elevator speed (L31) (e.g., elevator specifications having
decimal fractions), any error will be produced between the actual moving distance and internally
calculated one. If it happens, use L34 to adjust the moving distance so that the landing position
comes to be level.
L36 ASR (P constant at high speed)
L37 ASR (I constant at high speed)
L38 ASR (P constant at low speed)
L39 ASR (I constant at low speed)
L40 ASR (Switching speed 1)
L41 ASR (Switching speed 2)
L36 through L39 specify the P and I constants each at high and low speed of the auto speed regulator
(ASR). High and low speeds can be switched according to the ASR switching speeds 1 and 2 (L40
and L41).
 For details about the ASR switching speed, refer to the descriptions of L40 and L41.
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ASR P constant (L36 and L38)
The P constant should be specified in proportion to the inertia and machine constants of the load
connected to the motor shaft.
If P constant = 1.00, it means that the reference torque comes to be 100% (of the rated torque output
of each inverter capacity) when the speed difference (Reference speed (final) - Detected speed) is
100% (equivalent to the maximum speed setting).
- Data setting range: 0.01 to 200.00
Increasing the P constant relative to the inertia makes response from machinery or
equipment fast but may cause overshooting or hunting in motor. Further, due to
resonance of machinery or overamplified noise, machinery or motor may produce
vibration noise.
On the contrary, decreasing the P constant excessively delays response and may cause
speed fluctuation in a long cycle, taking time to stabilize the speed.
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ASR I constant (L37 and L39)
The integral constant for the ASR should be specified by the I constant. Since the integration refers
to integrating of deviation at the interval of time specified by I constant, setting a small constant
shortens the integration interval, making a faster response. On the contrary, setting a large constant
lengthens it, having a less effect on the ASR.
To allow overshooting and reach the target speed quickly, specify a small constant.
- Data setting range: 0.001 to 1.000 (s)
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