The 690+ has three control modes V/Hz (open loop), Sensorless Vector (SV) and Closed Loop Vector.
The Speed feedback for each option is OPEN LOOP (open loop), MOTOR CURRENT FEEDBACK (SV) and ENCODER (Closed Loop Vector).
Encoder Feedback is done one of 2 ways:
- Encoder Feedback board (FRAME B uses LA467461, Frame C+ uses 6054-00).
- System board (has Encoder Reference and Encoder Feedback terminals).
NOTE: A Systems board cannot be ordered separately.