UPS Easiest Direction based on Measurement
UPS Easiest Direction is a operation mode that is available when the drive is in Rescue Mode (P7-15 = 1).
To select UPS Easiest Direction set P7-02 = 2.
The function measures which direction is the easiest direction to run in during the start of each run while in mains mode. The result is then stored in P7-11 so when Rescue Mode is activated no test is needed to find the easiest direction to run in.
The results in P7-11 are as follows:
P7-11 Result | Function |
|---|---|
0 | Forward - Up (clockwise facing sheave) |
1 | Reverse- Down (anti-clockwise facing sheave) |
2 | Balanced - Switch Rescue Operation function mode |
While in Rescue Mode once a direction command is given and the run conditions are fulfilled the drive will follow the direction stored in P7-11, similar to Basic Rescue Mode (P7-02 = 0) no matter which direction command was given.
The image below shows how the timing of the function works and when switching from Mains Mode to Rescue Mode.
To setup the function follow the steps:
Set P7-02 = 2 to enable UPS Easiest Direction function.
Set the measurement time using P5-01 for the initial measurement then P7-10 if extra time needed. A total of 15 seconds is available (5 seconds in P5-01 and 10 seconds in P7-10).
While in MAINS MODE (P7-15 = 0) run the drive as normal.
Once the drive has stopped P7-11 automatically stores the result.
When next switching to Rescue Mode (P7-15 =1), if the drive is given a run command the direction stored by P7-11 will be the running direction for travel.
Important
If a balanced scenario occurs (P7-11 = 2), the drive will automatically switch to a different function of P7-02 depending on the motor control mode selected in P4-01.
The balanced scenarios for each motor type are:
Induction Motor (P4-01 = 0 or 1) - 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 |
P7-10 | Load Measurement extended time | sec | 0.0s | 0.0 ... 10.0s | RW | Y | 1 = 0.1s | 1 | 22C6h | 0 | 710 |
P7-11 | Light Load Detection Results | N/A | 0: Light direction is clockwise | 0: Light direction is clockwise 1: Light direction is Anti-clockwise 2: Balanced | RO | N | N/A | 1 | 22C7h | 0 | 711 |
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.
Sets the extended measurement time which starts of P5-01 has finished.
Increasing this value can help improve the measurement accuracy of the feature.
Shows the result of either the Light Load Detection Test (P7-02 = 1) or the UPS Easiest direction based on measurement result (P7-02 = 2).
Value | Result |
|---|---|
0 | Light direction is clockwise |
1 | Light direction is Anti-clockwise |
2 | Balanced |