Emerson Unidrive M400 Series User Manual page 150
Variable speed ac drive for induction motors
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Also See for Unidrive M400 Series:
- User manual (198 pages) ,
- Quick start quide (36 pages) ,
- Quick start manual (16 pages)
Table of Contents
Safety
Product
Mechanical
information
information
installation
Phase Loss
Supply phase loss
The Phase Loss trip indicates that the drive has detected an input phase loss or large supply imbalance. The drive will
attempt to stop the motor before this trip is initiated. If the motor cannot be stopped in 10 seconds the trip occurs
immediately. The Phase Loss trip works by monitoring the ripple voltage on the DC bus of the drive, if the DC bus ripple
exceeds the threshold, the drive will trip on Phase Loss. Potential causes of the DC bus ripple are input phase loss, Large
supply impedance and severe output current instability.
Source
Control
system
Power
system
32
Input phase loss detection can be disabled when the drive is required to operate from the DC supply or from a single phase
supply in Input Phase Loss Detection Mode (06.047).
Recommended actions:
•
Check the AC supply voltage balance and level at full load
•
Check the DC bus ripple level with an isolated oscilloscope
•
Check the output current stability
•
Check for mechanical resonance with the load
•
Reduce the duty cycle
•
Reduce the motor load
•
Disable the phase loss detection, set Pr 06.047 to 2.
Power Board HF
Power board HF
Power processor hardware fault. The sub-trip number is the HF code.
235
Recommended action:
•
Hardware fault - Contact the supplier of the drive
Power Boot Mode
Power board is in bootloader mode
Power board is in bootloader mode
245
Recommended actions:
•
Send power board firmware file to reprogram the power board using Unidrive M Connect and power cycle drive
Power Comms
Communication has been lost / errors detected between control and power board
The Power Comms trip is initiated if there is no communications between the control board processor and the power board
processor. The reason for the trip can be identified by the sub-trip number.
93
Recommended actions:
•
Hardware fault – Contact the supplier of the drive
150
Electrical
Getting
Basic
installation
started
parameters
xx
00
01
Sub-trip
1
PLL operating range out of lock
2
Power board lost communications with user board
3
User board lost communication with power board
4
Communication CRC error
Running
NV Media Card
Optimization
the motor
Operation
y
00: Phase loss detected based on control system feedback. The drive
0
attempts to stop the drive before tripping unless bit 2 of Action On Trip
Detection (10.037) is set to one.
0
00: Phase loss has been detected by the rectifier module.
Reason
Onboard
Advanced
Diagnostics
PLC
parameters
zz
Unidrive M400 Control User Guide
Issue Number: 1
UL
information
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