Rescue Operation - YASKAWA L1000A Technical Manual

Motor Acceleration Time n5-02
Inertia Compensation Gain
n5-03
<1> Insert 0 kg for the load to calculate the lowest setting, insert the elevator rated load to calculate the maximum setting for n5-03. Use the lower
setting for initial trials.
4. Change the setting of n5-03 within the limits calculated in step 3 until the desired performance is achieved.
If possible, trace the output speed after soft starter (U1-16) and the motor speed (U1-05) values. Increase n5-03 if the
motor speed does not follow the speed after soft start. Decrease n5-03 if the motor overshoots the designated speed at
the end of acceleration or undershoots the speed at the end of deceleration.
■
Adjusting Position Lock at Start (CLV/PM)
Set the S3- and C5-
• With the elevator car unloaded, adjust the speed loop gain (C5-19) and integral time for Position Lock (C5-20). Increase
the gain and reduce the integral time in order to reduce the rollback of the car. Set parameters C5-19 and
C5-20 in the opposite way if vibration occurs.
• Adjust the Position Lock at start gain 2 (S3-02). Increase S3-02 if rollback occurs, decrease S3-02 it if vibration occurs.
• If the elevator is balanced and oscillation at start occurs, attempt gradually increasing the setting in S3-40 in increments
of one pulse.

◆ Rescue Operation

In the event of a power outage, Rescue Operation allows the elevator to travel to the nearest floor by switching to a
backup battery or UPS (Uninterruptable Power Supply) for power.
An input terminal set for Rescue Operation (H1-
Operation, the drive uses the speed reference set in d1-25 to travel to the nearest floor.
NOTICE: Equipment Hazard. Do not use the Rescue Operation feature for extended periods. Failure to comply may result in drive heat
sink overtemperature alarms (oH).
NOTICE: When changing parameters while the drive is supplied from the rescue operation power supply, wait at least 5 s after entering
parameters before switching off the power supply. Instantly switching off the power can cause parameter settings corruption that can
only be resolved by initializing the drive. This may cause erroneous drive performance.
■
Drive Power Supply for Rescue Operation
There are various methods of supplying power to the drive for rescue operation. Independent of the chosen method, the
voltage in the DC bus of the drive and the voltage supplied to the drive control circuit must meet the specifications
provided in Table 4.13.
The DC bus voltage can either be supplied by a battery connected to the DC bus terminals of the drive or by a UPS
connected to drive terminals L1 and L2. The control circuit voltage can be supplied directly from the drives DC bus (no
external wiring required), from an external battery (connection to CN19), or by using an optional 24 Vdc control power
backup unit.
When using a single-phase AC power supply for rescue operation such as a single-phase UPS, the ripple in the DC bus
voltage will be higher than with a three-phase or battery supply. Make sure that the DC bus voltage never falls below the
minimum value listed in Table
When using a PM motor with an incremental PG encoder and a PG-X3 option card, always perform Initial Magnet Pole
Search Parameters Auto-Tuning (T2-01=3) with the normal power supply connected. The tuning function will prepare the
drive for Rescue Operation by automatically setting certain parameters. If the tuning ends with an "End8" to "End10"
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
π
n
r_Mot
n5-02 = J
30 T
Mot
r_Mot
30 v
2
ΣJ = J + Σm
2 r_Elev
i
π n
TS
r_Mot
n5-03 = ΣJ / J
Mot
parameters as described below in order to reduce rollback effects at start.
4.13.
4.6 Setup Procedure for Elevator Applications
2
• J - Motor inertia in kgm
Mot
• n - Rated motor speed in min
r_Mot
• T - Rated motor torque in Nm
r_Mot
• J - Traction sheave inertia in kgm
TS
• i - Gear ratio (n /n )
Load Mot
• v - Rated elevator speed in m/s
r_Elev
• Σm - Mass of all moved parts (car, counterweight, ropes, load
= 55) can be used to initiate Rescue Operation. During Rescue
-1
2
) in kg
<1>
4
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