Fuji Electric FRENIC-AQUA series, User Manual

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E82,
E83,
E84
Switching Frequency of Accel/Decel Time in Low-Speed Domain,
Acceleration Time in Low-Speed Domain,
Deceleration Time in Low-Speed Domain
In low-speed domain, driving a pump motor whose load current is large (e.g., deep well
pump) for a long time may damage the motor. Large load current and slow flowrate burn the
pump motor. To prevent it, the inverter provides the acceleration/deceleration time exclusive
to the low-speed domain and avoids a long run in that domain.
From the start (0 Hz) to the frequency switching point (E82), the acceleration time in
low-speed domain (E83) applies. After the output frequency reaches the switching point
(E82), the currently selected acceleration time (F07/E10/E12/E14) applies. At the time of
stoppage, from the frequency switching point (E82) to 0 Hz, the deceleration time in
low-speed domain (E84) applies.
This function works also in reverse operation for anti-jam and during PID control being
canceled.
This function does not work in the domain exceeding the low frequency limit specified by
F16. The default of F16 is 0.0 Hz so that this function does not work by default independent
of the E82 setting. To use this function, therefore, increase the F16 setting to a value greater
than E82 setting.
F16 (Frequency limiter (Low)) > E82 F16 (Frequency limiter (Low))
≤
E82
„
Switching frequency of accel/decel time in low-speed domain (E82)
E82 specifies the switching frequency (frequency switching point).
Data for E82 Switching frequency
Inherit Follow the setting of F16 (Frequency limiter (Low))
0.1 to 120.0 Hz Arbitrary value within the range of 0.1 to 120.0 Hz
„
Acceleration time in low-speed domain (E83)
E83 specifies the acceleration time from the start (0 Hz) to the frequency switching point
(E82). (When F16
≤
E82, from 0 Hz to the F16 setting)
- Data setting range: Inherit (Currently selected acceleration time), 0.01 to 3600.00 (s)
„
Deceleration time in low-speed domain (E84)
E84 specifies the deceleration time from the frequency switching point (E82) to 0 Hz. (When
F16
≤
E82, from the F16 setting to 0 Hz)
- Data setting range: Inherit (Currently selected deceleration time), 0.01 to 3600.00 (s)