Rescue Operation - YASKAWA L1000V Technical Manual

u 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.
NOTICE: In L1000V drives with software version 7010 power to the drive must be cycled after setting a digital input terminal to Rescue
Operation (H1- =55) for the setting to take effect.
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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 4.8.
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 is supplied directly from the drive's DC bus.
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
Motor Type
Induction Motor
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Parameter Setup
Adjust drive parameters as described below when using Rescue Operation.
• Select the type of Rescue Operation power supply for the drives main circuit in parameter S4-06.
• When using a UPS, set the UPS power value to parameter S4-07. Use parameter S4-08 to decide if the Rescue
Operation speed shall be limited automatically depending on the UPS power.
• If deterioration of the battery or UPS should be detected, also set up parameters S4-12 and S4-13. Measure the DC bus
voltage during operation with the rescue power supply and set the measured value to parameter S4-12. Set the
deterioration detection level to parameter S4-13.
• Set parameters S4-01 to S4-04 to select if light load direction search should be automatically performed when Rescue
Operation is started and to configure the light load search function.
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Wiring Examples
Switching the main power supply to a battery or UPS requires magnetic contactors that must be controlled by an external
controller. Wiring methods and the sequence used for the magnetic contactors depend on the application. This instruction
manual describes the following configurations:
• A single-phase, 230 V UPS is used as backup power supply for a 200 V or 400 V class drive.
• Two separate batteries for the main power and control power supplies. Main power battery voltage is below 250 Vdc
for 200 V class drives or 500 Vdc for 400 V class drives.
• Two separate batteries. One is used for the main power supply, a second battery supplies the controller via an optional
24 V Backup Power Supply Unit.
• A single battery with minimum 250 Vdc for 200 V class drives or 500 Vdc for 400 V class drives is used for the main
and control power supply.
YASKAWA EUROPE SIEP
= 55) can be used to initiate Rescue Operation. During Rescue
4.8.
Table 4.8 Power Supply Ratings for Rescue Operation
DC Bus Voltage
200 V class drives: 115 to 300 Vdc
400 V class drives: 230 to 600 Vdc
YASKAWA AC Drive L1000V Technical Manual
4.6 Setup Procedure for Elevator Applications
Control Circuit Voltage
Same as DC Bus Voltage.
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