264
Unidrive M702 User Guide
Issue Number: 3
OI Snubber
Snubber over-current detected
92
The
OI Snubber
trip indicates that an over-current condition has been detected in the rectifier snubber circuit. The reason
for the trip can be identified by the sub-trip number.
Recommended actions:
•
Ensure the internal EMC Filter is installed
•
Ensure the motor cable length does not exceed the maximum for selected switching frequency
•
Check for supply voltage imbalance
•
Check for supply disturbance such as notching from a DC drive
•
Check the motor and motor cable insulation with an insulation tester
•
Fit an output line reactor or sinusoidal filter
Option Disable
Option module does not acknowledge during drive mode changeover
215
The
Option Disable
trip indicates that the option module did not acknowledge notifying the drive that communications with
the drive has been stopped during the drive mode changeover with in the allocated time.
Recommended trip:
•
Reset the trip
•
If the trip persists replace the option module
Out Phase Loss
Output phase loss detected
98
The
Out Phase Loss
trip indicates that a phase loss has been detected at the drive output. If
Output Phase Loss Detection
Enable
(06.059) = 1 then output phase loss is detected as follows:
1. When the drive is enabled short pulses are applied to make sure each output phase is connected.
2. During running the output current is monitored and the output phase loss condition is detected if the current contains
more than TBD % negative phase sequence current for
TBDs.
Recommended action:
•
Check motor and drive connections
•
To disable the trip set
Output Phase Loss Detection Enable
(06.059) = 0
Over Frequency
Output frequency has exceeded the maximum frequency threshold
222
The
Over Frequency
trip indicates that the output frequency has exceeded 560 Hz for more than 4 ms.
Over Speed
Motor speed has exceeded the over speed threshold
7
In open loop mode, if the
Output Frequency
(05.001) exceeds the threshold set in
Over Speed Threshold
(03.008) in either
direction an Over Speed trip is produced. In RFC-A and RFC-S mode, if the Speed Feedback (03.002) exceeds the Over
Speed Threshold in Pr
03.008
in either direction an Over Speed trip is produced. If Pr
03.008
is set to 0.0 the threshold is
then equal to 1.2 x the value set in Pr
01.006
.
In RFC-A and RFC-S mode, if an SSI encoder is being used and Pr
03.047
is set to 0 an Over Speed trip will be produced
when the encoder passes through the boundary between its maximum position and zero.
Recommended actions:
•
Reduce the
Speed Controller Proportional Gain
(03.010) to reduce the speed overshoot (RFC-A, RFC-S modes only)
•
If an SSI encoder is being used set Pr
03.047
to 1
Trip
Diagnosis
Source
xx
y
zz
Description
Power
system
Power
module
number
Rectifier
number
00
Rectifier snubber over-current trip detected.
Summary of Contents for Unidrive M702
Page 283: ......
Page 284: ...0478 0002 03 ...