What to do if Emerson Unidrive M201 Controller shows an under voltage state?
If your Emerson Controller is in an under voltage state, the issue could stem from an AC supply loss, a low voltage DC supply loss, or a UPS supply loss. You should check the power supply connections and drive configuration to resolve this.
What causes I/O overload at Emerson Controller power up or during operation?
An I/O overload in your Emerson Controller can occur at power up or during operation if the drive's internal 24 Vdc supply is being overloaded. Check for faults on the control circuit supplied by the drive's internal 24 Vdc supply. Also, ensure the low voltage DC circuit and any auxiliary loads are not causing the overload trip. If the overload persists with only control terminal 22 (24 Vdc 100 mA) being used, connect the external user 24 Vdc supply.
Why is my Emerson Unidrive M201 Controller waiting for power systems on power up for Low voltage DC operation?
If your Emerson Controller is waiting for power systems on power up during low voltage DC operation, this could be due to an external user 24 Vdc supply loss to the power stage. To resolve this, connect the external user 24 Vdc supply to the power stage of the drive, using connections 51 / 52.
What causes a phase loss trip in Emerson Unidrive M201 Controller?
A phase loss trip in your Emerson Controller can be caused by an AC supply loss. Check the AC supply voltage balance and level at full load. You may also need to check the DC Bus ripple level with an isolated oscilloscope, verify the connection of L2 ? L3 for UPS supply with drive frame sizes 7 and larger, check the output current stability, reduce the motor load, or disable the input phase loss detection.
What to do if Emerson Unidrive M201 parameters are not saved after power down?
If your Emerson Controller parameters are not being saved after power down, and the drive is operating in Low voltage DC mode or with an external user 24 Vdc supply connected to the Control PCB, you need to set parameter mm.xxx = 1001 to save the parameters.
What to do if Emerson Controller Elevator drive seam-less Low voltage DC operation is not working?
If the seam-less Low voltage DC operation from your Emerson Controller Elevator drive is not operating, it could be due to external contactor control or feedback issues. Ensure the external contactor is connected and sequenced correctly. Also, verify the feedback from the external supply contactor is properly connected to the drive and sequenced correctly. Refer to parameter Pr 06.070 Under Voltage System Contactor Closed and Pr 06.065 - Standard Under Voltage Threshold and Section 6.5 System configurations.
Why does Emerson Controller show OI ac on removal of 24 Vdc for Low voltage DC operation?
The Emerson Controller might display 'OI ac' when removing 24 Vdc for low voltage DC operation because the external user 24 Vdc supply is not being removed simultaneously from both the Power Stage (51 / 52) and the Control PCB (1 / 2). Ensure simultaneous removal, especially in drive frame sizes 6 and larger.
How to troubleshoot PSU 24 trip on power up for Low voltage DC operation on Emerson Unidrive M201?
If your Emerson Controller experiences a PSU 24 trip on power up for Low voltage DC operation, it could be due to an external user 24 Vdc supply loss to the Control PCB. Connect the external user 24 Vdc supply to Control PCB connections 1 / 2. Additionally, connect the external user 24 Vdc supply to supplement the internal 24 Vdc supply.
Why does Emerson Unidrive M201 show OHT power during Low voltage DC operation?
If your Emerson Controller shows OHT power during Low voltage DC operation, the issue might be related to the heatsink cooling fans. For drive frame sizes 9 and larger, ensure the external user 24 Vdc supply is connected to the Power Stage 61 / 62 for the heatsink cooling fans. Also, ensure the external user 24 Vdc supply is sufficiently rated for the heatsink cooling fans.
What causes incorrect direction, speed or distance errors in Emerson Unidrive M201?
If your Emerson Controller is showing incorrect direction, speed, or distance errors, and you suspect the elevator is operating incorrectly, ensure that the Low voltage DC supply or UPS are not being overloaded due to the car loading. Also, ensure the motor is fully magnetised.
General| Model | Unidrive M201 |
|---|---|
| Series | Unidrive M |
| Protection Class | IP20 |
| Storage Temperature | -40°C to +70°C |
| Dimensions | Varies by model |
| Weight | Varies by model |
| Enclosure Rating | IP20 |
| Frequency Range | 0 to 400 Hz |
| Control Method | Sensorless Vector Control |
| Overload | 150% for 60 seconds |
| Braking | Dynamic braking |
| Protection Features | Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit |
| Humidity | 95% RH non-condensing |
| Power Rating | Depends on model within range |
| Output Current | Depends on model within range |
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