Remedied from:
9400 HighLine SW V5.0
Behaviour of the new version?
Mains phase failure detection has been implemented especially for devices of device sizes 8s to 10 since the input rectifier of these devices is not dimensioned for a two-phase supply at rated power.
In the past the detection was falsely triggered sometimes because a mains phase failure had been detected that was not real. Fluctuations in the DC-bus voltage were detected to be a mains phase failure.
Mains phase failure detection for device sizes 8s to 10 has been revised to not falsely trigger anymore if the DC-bus voltage fluctuates.
Such mains phase failure detection is not needed for device sizes 1 to 7 because their input rectifiers are not overloaded with a two-phase supply. Mains phase failure detection has been removed for device sizes 1 to 7 in the course of revision.
Which products are affected?
9400 HighLine SW ≤ V4.1
9400 StateLine SW ≤ V4.0
What happens?
If a mains phase is missing a drive fault is not triggered as expected. The detected deterioration of the smooth running features or the torque control at the drive results from a higher ripple of the DC bus voltage.
When does the problem occur?
The AC mains supply of the 9400 Single Drive is executed via three phases. If less than three phases supply the drive, the 'mains phase failure' [0x007b003f] monitoring should indicate 'fault' as response. The monitoring function odes not work.
As a result, it would not be detected during operation if the AC side was only supplied via two phases. The input rectifier of axis modules ≥ 145 A (device size 8S-10) would be overloaded with two-phase supply and rated power operation. In case of axis modules ≤ 104 A (device sizes 1-7) the rectifier diodes are not overloaded even if the mains supply is executed via two phases.
Possible diagnostics?
If the mains supply is intentionally executed via two phases for test purposes a drive fault is not triggered even if is operated for a short period of time close to the rated power of the axis module.
Shot-term measures/recommendations?
In order to ensure the device protection for axis modules ≥ 145 A external monitoring measures are required.
Evaluation:
In case of axis modules ≥ 145 A (device size 8S-10) the device protection is missing if one mains phase fails. It may happen that the missing of one mains phase is not detected during commissioning or the problem during production.
Published with Service Message No. 18/2009 and Service Message No. 25/2008 Update
