User’s Guide for EM760 series high-performance vector inverter 5.8 Closed-loop vector adjustment procedures ⚫ Set the command source of the inverter to keyboard control and the main frequency source to digital frequency F00.07 (5.00Hz); set F12.00 M.K multi-functional key to option: 3 (Forward/Reverse switching); drive control mode of motor F00.01: 0 (VVF). ⚫ Press "RUN" on the keyboard to run the inverter; check F18.02 (PG feedback frequency) - it should fluctuate around 5.00Hz after stabilization; then press M.K to make the inverter run reversely, and after stabilization the feedback frequency should fluctuate around -5.00Hz.
Afterwards, set F00.07 to 10.00Hz, 25.00Hz and 50.00Hz successively (make sure it is safe and technologically allowed!) Repeat the above operations. If all goes normal, it means the PG card and encoder are properly wired and set. ⚫ If the motor rotation direction is opposite to the actual direction, please exchange connection of any motor line pair; if the feedback frequency direction of the encoder is opposite to the actual direction (F18.02 and F18.01 are opposite in direction), please exchange the wiring connection of phase A and B on the PG card; if the feedback frequency value is incorrect, please check F01.25 encoder line count.
5.9 Abnormality handling Abnormal rotating direction of the motor ⚫ Check whether the parameter value of F00.03 is correctly set. The logic diagram is shown in Fig. 5-2 and Fig. 5.3. ⚫ Check the motor wiring for correctness. ⚫ Seek technical support. Abnormal self-learning of encoder ⚫ Check the motor wiring line count for correctness. ⚫ Check all PG cards of the encoder for proper correspondence. ⚫ Check the motor encoder wiring for correctness. ⚫ Seek technical support. 40