User Manual of EM730/EM730E Series Inverter
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Output
frequency (Hz)
Output frequency
detection 1
Output terminal 1
0
Invalid
Hysteresis 1
Valid
Output frequency
detection 2
Hysteresis 2
(negative)
Output terminal 2
Invalid
Valid
Fig. 7-37 Schematic Diagram of FDT Detection
As shown in Fig. 7-37, 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.
2. If the hysteresis is negative 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
