Amtech
6-64
6
Current limit decel
time (A209)
Current limit accel
time (A208)
Vdc
F
Output freq.
(M101)
Stall current
limit (B301)
t
t
t
DC bus voltage
control (B307=1)
740Vdc
M105
Set the current limit as a percentage of motor rated current.
When local is selected in A309: Stall Current Limit Selection, B301 will be effective. When terminal is
selected, stall current limit is set by the 0-10V analog signal at VIN. Its range is from 0 to 200%
according to 0-10V at VIN.
B302: Adjustable Over Current Level (%)
Set the upper current limit as a percentage of motor rated current. Whenever the AC DRIVE output
current exceeds the set value, the AC DRIVE trips indicating Adjustable over current fault. Always set
higher side to prevent the unnecessary tripping of the AC DRIVE during normal operation. This gives
the user to program the current level below the standard inverse time curve. This may be used in
cases where excessive torque shocks can lead to a harmful effect on the machinery.
Set to 300% to disable this function. The standard inverse time trip remains in effect.
B303: Acceleration Current Limit (%)
This is acceleration current limit and effective only during normal acceleration. It stops the
acceleration during acceleration, if the motor current exceeds the programmed value. When the
current reduces below the programmed value, the AC DRIVE again starts accelerating to the set
speed. This feature helps in preventing over current tripping of high inertia load during fast
acceleration.
B304: Under Current Level (%)
This feature trips the AC DRIVE when the current falls below the programmed value for more than
1sec after the speed reaches its set speed. This feature is not active while the AC DRIVE is
accelerating or decelerating. Making this 0 will disable this.
F
Output freq.
(M101)
Accel current
limit (B303)
t
t
M105
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