Fuji Electric Europe GmbH
Page 20 of 26
U49 and U59 holding times are activated when APL function is enabled and output frequency is inside limit
levels. Limits are shown in table 14. In figure 10 an operation example is shown. In this case, because of
APL, output frequency is limited to a value between upper and lower limit 1 (U44, U45). Because output
frequency is between Limit 1 levels, when creep speed is selected, current output frequency will be hold
during U49 time. As soon as holding time U49 is expired, inverter will decelerate the motor to creep seed.
Speed
ON
U55
U45, U54
Tiempo
ON
High speed
U44
U49
ON
ALP
Figure 10: Deceleration holding time when Limit 1 zone is reached
Output frequency
Deceleration holding time
(default setting)
Upper Limit 1
U44 (90 %)
45 Hz
U49 (0.25 s)
Lower Limit 1
U45 (79.9 %)*
40 Hz
Upper Limit 2
U54 (79.9 %)*
40 Hz
U59 (0.50 s)
Lower Limit 2
U55 (60 %)
30 Hz
Table 14: Deceleration holding time related parameters
*
In case that output frequency is exactly the value of U45 and U54 (in case of default setting 79,9%),
holding time used will be the one of U49.
Note:
U44, U45, U54 and U55 parameters are set in %. This % is referred to rated frequency of the motor.
It is recommended to set U49 when car is half load and U59 when car is full load.
Input limit power and holding times will depends on the installation, this is reason why each parameter can
be programed by end user.
