Scope of this technical record
Field supply and field-current feedback path for F005 and selected-field cases on SIMOREG 6RA70.
Field checks require qualified personnel and de-energized procedures unless the installed service procedure explicitly allows live measurements.
Path boundary
This path starts at the selected motor field and field supply source, then follows field fuse, F+ / F- wiring, field winding, feedback and CUD1 interpretation. It ends at a service decision rather than a blind board replacement.
Use this path when
Use it when F005 appears, field current is missing or inconsistent, the field circuit has been disturbed, or field feedback does not match physical field evidence.
Technical basis and reference documents
This is an independent editorial technical reference. Original manufacturer documentation remains controlling for installation, repair and commissioning decisions.
Used to verify that 6RA70 fault work should preserve the fault value and separate CUD1 / power-interface evidence from field and armature circuit evidence.
Used to confirm the 6RA70 architecture as a three-phase AC supplied DC converter for armature and field circuits, with hazardous service boundaries around power and control electronics.
Turn this record into a qualified service request
A repair decision is much more reliable when the request includes the exact identity of the drive, the first fault evidence and the machine condition when the symptom appeared.
- Complete drive type code / MLFB or nameplate model
- Fault code, fault value and first event before reset
- When the event appears: power-up, enable, ramp, run, decel or stop
- Motor/cable connected or isolated during the symptom
- Visible board, option-card, module and connector identifiers
- Previous repair history, replacement parts and repeat-failure pattern