QUESTION: During commissioning or normal operation of SIMOREG 6RA70 DC Master drives, fault F030 is sometimes triggered sporadically for no justifiable reason.
What could be the cause?




ANSWER/ REMEDY/ TIPS:

SIMEA A&D PD is currently developing an optional add-on component for the 6RA70 DC Master drives generation. This component will provide protection for the drive and semiconductor fuses particularly in the case of inverter commutation failure in regenerative feedback mode, a state in which very high currents occur.
For this purpose, a commutation monitoring function and an adapted overcurrent monitor for detecting inverter commutation failure have been added to version V2.12 and later of the drive firmware.
Prior to release, the new functions were subjected to a very wide range of different tests in the development laboratory, including reliability tests. The decision was consequently made to add the new functions as part of the firmware version V2.12 release package.
Although the optional component 6RA70CCP has not yet been approved for release to our customers, this functional expansion has rendered the drive capable of issuing a pulse inhibit command immediately it detects an inverter commutation failure, thereby preventing system short-circuits following commutation failures or "shoot-through faults" in the converter. The result is that the drive switches to a fault state with F030. Which event lead to the triggering of F030 can be identified by the fault value in r047.01.





In the meantime it has been discovered that decision criterion 2 reacts too quickly in some cases.
This will be corrected in firmware version V2.13 and later.

Remedy:
If you have installed firmware version V2.12, you might need to deactivate decision criterion 2 (by setting U580=4).

Tip:
In firmware version V2.12, only decision criteria 2 and 3 are currently activated with the factory setting at U580=6 (contrary to operating manual which states FS=7).