Which products are affected?
EVS93xx-EI (Servo PLC Version 6.2 DSMC control board)
EVS93xx-ET (Servo PLC Version 6.2 DSMC control board)
What happens?
For DC bus operation of several drives with fuses in the DC bus connection, the DC bus fuse fails sporadically since the DC bus load resistors are bridged too early. As a result a current pulse can blow the fuses.
When does the problem occur?
The problem occurs when switching on the interconnected drives equipped with the older control board versions 9321 MP PA and 9321 MP PB in combination with firmware versions 6.2 und older.
Possible diagnostics?
None.
Short-term measures/recommendations?
None.
Evaluation:
Devices with older control board versions which have been manufactured in combination with firmware versions 6.0..6.2 are affected. This fault has been eliminated as of firmware version 6.3 in combination with the 9321 MP PC control board.
