SETTING OF INVERTERS.
No | Name | Description | Setting range | Factory setting | Change during operation | Control methods | |||
v/f | v/f with pg | Open loop vector | Flux vector | ||||||
L2-02 | Momentary power loss ride thru time | This setting is valid only when constant l 2-01 is set to 1. Set the power loss ride thru time in seconds. Note : the factory setting depends on the inverter,s capacity . it is the momentary power loss ride thru time when l 2-01 is set to be 1. | 0.0~2.0 | 2.0 | x | B | B | B | B |
L2-03 | Min base block time | To set the time base block time in unit of seconds when the inverter restarts after momentary power loss. Note : the factory setting depend on inverter capacity this setting is used with the speed search and dc injection braking function. Set the time required for the leakage voltage to dissipate. Increase the setting if an over current (0 c) occurs when the speed search or dc injection braking function starts. This setting is valid for speed searches after a momentary power loss regular speed searches. | 0.1~5.0 | 1.0 | x | B | B | B | B |
L2-04 | Voltage recovery time | Set the time allowed for the normal voltage to be restored after completion of the speed search . the unit is seconds . Note : this is the time in seconds for voltage to be restored from 0 v ac to 400 v ac after set speed researching is finished . this setting is valid for speed searches after a momentary power loss regular speed searches the voltage changes with energy saving control and voltage changes with base block clearing. | 0.0~5.0 | 1.0 | x | A | A | A | A |
L2-05 | Under voltage detection level | Detection level of main circuit low voltage (main circuit dc voltage ) it is in unit of voltage. Note : setting range and the factory default is 400 volt to set normally it is not necessary to change the setting use this constant when you want to add an ac reactor and lower the main circuit under voltage detection level be sure to set a main circuit dc voltage value voltage that will detect a main circuit under voltage . | 300~20 | 380 | x | A | A | A | A |
Stall prevention selection during acceleration .
To setting of acceleration prevention.
0: disabled (acceleration as set with a heavy load the motor may stall.).
1: enabled (acceleration stopped when l 3-02 level is exceed acceleration starts again when l 3 the current is returned).
2: intelligent acceleration mode ( using the l 3-02 level as a basis acceleration is automatically adjusted set acceleration time is disregarded )
As tall occurs if the rotor con not keep up with the rotating magnetic field on the motor stator side when a large load is applied to the motor or a sudden acceleration / deceleration is performed. in the inverter stall prevention function can be set independently for accelerating running and decelerating
(some function are restricted depending on the control method.).
Setting .
when setting 1 (enabled) is selected acceleration is stopped if the motor current exceeds the acceleration stall prevention level , acceleration is started again when the current falls below this level . the acceleration time can be longer than the setting depending on the load . when setting 2 optimum acceleration is selected depending on the load . when setting 2 (optimum acceleration ) is selected acceleration is performed using the acceleration stall prevention level as a basis in this case the acceleration time is disregarded.
KEB SYNCHRONOUS DECELERATION.
the keb function restores the operating conditions for momentary power loss by applying a frequency deceleration to create inertia energy when a power loss occurs and thus avoid the power loss . setting range is 0.0~100.0 , factory setting is 0.0 and change during operation is x .
the inertia energy occurs since momentary power loss and frequency deceleration happen simultaneously . this energy avoids power loss and it is the function of operation status before the power is available . keb function is normally used with film lines and other applications where multiple keb inverters are connected to the main Dc bus. keb synchronous deceleration for power loss prevents the line from stopping as the result of speed fluctuations. keb action can be effected though keb command of multi-function input terminal , setting 65 or 66 , keb application power range
200 volt level 0.4~15 kw/400 volt level 0.4~18.5 kw.
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