Energy Optimized
The Energy Optimized function is a operation mode that is available when the drive is in Rescue Mode (P7-15 = 1).
Sometimes referred to as Gravity Mode, Energy Optimized mode switches off the output and controls the Elevator Car by opening and closing the brake via Relay 2 (or Relay 1 if P1-30 = 15) at set intervals using the value in P5-02 to control the Elevator Car speed, rather than via a speed control reference.
To select Energy Optimized function set P7-02 = 3.
The above the diagram shows how to activate Energy Optimized function from the parameters.
Energy Optimized Function - Operation
The operation sequence for Energy Optimized mode is as follows:
Direction command given (Forward / Reverse)
The motor brake releases (Relay 2 Closes)
The drive then either moves or stays still (balanced scenario)
If the drive reaches target speed set in P7-13 in the time set in P7-14 the motor brake applies (Relay 2 Opens)
The brake then opens and closes at a fixed intervals to drop the car down.
This continues until a stop command is given.
Important
If the car does not move during the time set in P7-14, or fails to reach the minimum speed set in P7-13 this means the car is balanced. In this case the drive automatically switches to a different function in P7-02 depending on the motor control mode selected in P4-01:
Induction Motor (P4-01 = 1 or 2) - Light Load Detection (P7-02 = 1)
Permanent Magnet Motor (P4-01 = 3) - Basic Rescue Mode (P7-02 = 0)
Parameter Number | Parameter Name | Units | Default | Available Settings | Access | Change During Run | Scaling | Size (Bytes) | CAN Register | CAN Sub Index | Modbus Register |
|---|---|---|---|---|---|---|---|---|---|---|---|
P7-02 | Rescue Operation Function | N/A | 0: Basic Rescue Mode | 0: Basic Rescue Mode 1: Light Load Detection 2: UPS Easiest Direction based on Load Measurement 3: Energy Optimized | RW | N | N/A | 1 | 22BEh | 0 | 702 |
P7-12 | Energy Saving Rescue Unbalancing Max speed | Hz / rpm / ft/s / m/s | 5.00 Hz | P8-02 ... P8-01 | RW | Y | 1 = 0.01Hz | 2 | 22C8h | 0 | 712 |
P7-13 | Energy Saving Rescue Minimum Speed | Hz / rpm / ft/s / m/s | 5.00 Hz | P8-02 ... P8-01 | RW | Y | 1 = 0.01Hz | 2 | 22C9h | 0 | 713 |
P7-14 | Energy Saving Rescue Minimum Speed Time | sec | 0.0s | 0.0 ...10.0s | RW | Y | 1 = 0.1s | 1 | 22CAh | 0 | 714 |
Setting | Function |
|---|---|
0 | Basic Rescue Mode |
1 | Light Load Detection |
2 | UPS Easiest Direction based on Load Measurement |
3 | Energy Optimized |
There are 3 types of rescue mode operation, the following points of consideration help select the most suitable mode:
If the controller is to choose the direction of travel, then mode 0 should be used.
Mode 1 and 2 lets the drive measure which is the easiest direction of travel to consume the least amount of energy from the UPS/Battery. Mode 1 selects while in Rescue Operation, Mode 2 selects while in normal operation.
Mode 3 is when the drive output should be switched off and controlled by the motor brake.
This is the maximum allowable speed when the drive is operating in rescue mode and with P7-02 = 3, when this value is reached the drive will command the motor brake to apply.
This is the minimum speed that must be achieved when Energy saving mode is active, further this speed must be achieved within the time set in P7-14, otherwise the drive will apply the brake and automatically carry out the Light Load Detection test (as per P7-02=1) on Geared motors or use direction from controller (P7-02 = 0) on gearless motors.
This parameter is used in conjunction with P7-13, when Energy Saving mode (P7-02 = 3) is active the speed must be at least the value in P7-13 within the time set in P7-14.