Programming 104
L2-04 Momentary Power Loss Voltage Recovery Ramp Time
Setting Range:
0.0 to 5.0 Seconds
Factory Default: Model Dependent
When momentary power loss recovery is enabled (L2-01
≠
0), a speed search is executed to catch the potentially spinning
motor shaft. As part of the speed search function full voltage is not immediately applied to the motor but is ramped up.
The setting of parameter L2-04 determines the ramp time for increasing the output voltage from zero to maximum voltage
(E1-05).
If a UV1 fault occurs during the current detection speed search function, increase the setting of L2-04.
L2-05 Undervoltage Detection Level
Setting Range:
150 to 210 VDC
Factory Default: 190 VDC
The L2-05 parameter sets the DC Bus undervoltage level. The setting of L2-05 affects the voltage at which a UV alarm or a
UV1 fault will occur. If the setting of L2-05 is lowered below the factory default level (190Vdc for a 240Vac drive and
380Vdc for a 480Vac drive), then an AC Input Reactor must be installed on the input AC line to prevent inrush current from
damaging the Drive’s input diodes. An AC Line dip and fast voltage recovery can potentially cause a large inrush current.
L3 Stall Prevention
L3-01 Stall Prevention Selection During Accel
L3-02 Stall Prevention Level During Accel
Setting Range:
0 to 200% of Drive rated output current
Factory Default: 120% of Drive rated output current
The stall prevention during acceleration function adjusts the acceleration time in order to prevent OC fault trips during
acceleration. If L3-01= “0: Disabled”, stall prevention is disabled. If the load is large enough and the acceleration time short
enough the Drive may fault and stop.
If L3-01= “1: General Purpose”, then the standard stall prevention function is enabled. When the output current exceeds the
level set by the L3-02 parameter, the Drive will discontinue accelerating and maintain speed. If, during acceleration, the
output current comes within 15% of the level set by parameter L3-02, the acceleration time is lengthened. Once the output
current level has dropped below the L3-02 level, acceleration will begin again with the acceleration rate reaching the
programmed rate once again 15% below the L3-02 level.
Setting
Description
0
Disabled
1
General Purpose (
factory default
)
2
Intelligent
Summary of Contents for E7U
Page 1: ...E7 Drive Programming Manual Model E7U Document Number TM E7 02...
Page 140: ...Programming 134 Notes...
Page 170: ...Parameters A 30 Notes...
Page 174: ...Factory Default Settings B 4 Notes...
