User Manual of A90 Series Inverter Output frequency (Hz) Output frequency detection 1 Output frequency detection 2 0 Output terminal 1 Output terminal 2 Fig. 7-36 Schematic Diagram of FDT Detection As shown in Fig. 7-36, when the multi-function output terminal or relay output is set to “3: output frequency detection FDT1” or “4: output frequency detection FDT2” and the inverter is running: 1.
If the hysteresis is positive and the |output frequency| is greater than the result of “output frequency detection FDT1/2” (F15.21/F15.23), the corresponding function terminal will output the active level; if the |output frequency| drops to less than the result of “output frequency detection FDT1/2 (F15.21/F15.23) - FDT1/2 hysteresis (F15.22/F15.24)”, the corresponding function terminal will output the inactive level; and if the |output frequency| is within the range of (output frequency detection - hysteresis, output frequency detection), the output level of the corresponding function terminal will remain unchanged.
236 Function Default Function code name Parameter description Unit Attribute code setting F15.21 Output frequency detection FDT1 0.00 to maximum frequency F00.16 Hz 30.00 ○ F15.22 FDT1 hysteresis -(Fmax-F15.21)~F15.21 Hz 2.00 ○ F15.23 Output frequency detection FDT2 0.00 to maximum frequency F00.16 Hz 20.00 ○ F15.24 FDT2 hysteresis -(Fmax-F15.23)~F15.23 Hz 2.00 ○ Hysteresis 1 Hysteresis 2 (negative) Valid Invalid Valid