IMO VXSM75-1 Instruction Manual page 61

H09 Start mode (Rotating motor pickup)
•
This function smoothly starts a motor
coasting due to an external force or the like
after momentary power failure.
The speed of the motor is detected upon
power recovery or restart and the same
frequency as that for the motor speed is
output. Therefore the motor starts smoothly
without a shock. However, when the coasting
speed of the motor converted in the inverter
frequency exceeds 120 Hz, setting of F03
"Maximum frequency 1" or setting of F15
"Frequency limiter (High)", the regular
starting method is adopted.
Setting Regular starting
0 Inactive
1 Inactive
2 Active
•
Description of setting
1: This function is effective when the setting of
F14 "Restart after momentary power failure
(Operation selection)" is "2" or "3".
Starting is made at the same frequency as
that for the coasting speed.
2: Upon restart after momentary power failure,
operation command ON and other starting
methods, the speed of the coasting motor is
detected and starting is made at the same
frequency as that for the coasting speed.
Note) When this function is used, use the
following setting to detect the accurate
rotation speed of the motor.
When a non-standard motor is used or when
the wiring length is long, perform P04 Tuning.
H10
Energy-saving operation
•
When the output frequency for a small load is
constant (constant speed operation) and the
setting of F09 "Torque boost 1" is other than
"0", the output voltage is automatically
lowered to minimize the product (power) of
the voltage and the current.
Setting 0: Inactive
1: Active
Notes)
1. Use this function for fans, pumps or other
square reduction torque loads. If this function
is applied to a constant torque load or to an
application with a rapidly changing load, there
is a delay in the control response.
2. The energy-saving operation is automatically
canceled to resume regular operation during
acceleration or deceleration or when the torque
limiter function is activated.
5-32
H11
•
Select the stopping method of the inverter
after a stop command.
Setting 0: Normal
Note) This function is not activated when the
H12
•
When the motor load abruptly changes to
cause a current exceeding the protective
Restarting after
level of the inverter to flow, the inverter trips
momentary
due to the overcurrent. The Instantaneous
power failure
overcurrent limiting function controls the
Inactive
inverter output within the protective level even
Active
upon an excessive load.
•
Active
The operation level of the Instantaneous
overcurrent limiting cannot be adjusted. Use
the torque limit function to set on output
limitation.
•
The torque generated by the motor may
become low in a Instantaneous overcurrent
limiting state. Therefore deactivate the
momentary overcurrent limit function for
applications such as the elevator where the
torque generated by the motor must not be
low. In this case, because the inverter trips
due to an overcurrent when a current
exceeding the protective level of the inverter
flows, use forcible stopping measures by a
mechanical
measures.
Setting 0: Inactive
H13
•
When the power supply to a running motor is
shut off or power failure occurs and the power
supply is quickly switched to another system,
the phase of the voltage of the new system
deviates from the phase of the voltage
remaining in the motor and electrical or
mechanical trouble may be developed. When
switching the power supply system in a short
time, write the time for attenuation of the
remaining voltage from the motor after power
shutoff. The setting is effective during restart
after momentary power failure.
Setting range: 0.1 to 5.0 s
If the duration of momentary power failure is
shorter than the wait time data, restart is made
after this time. If the duration of momentary
power failure is longer than the wait time data,
Dec mode
(Deceleration to stop based on data
of H07 "ACC/DEC pattern")
1: Coast-to-stop
set frequency is lowered to stop. The
function is activated only when a stop
command is input.
Instantaneous overcurrent limiting
brake or other
1: Active
Auto-restart (Restart time)
Selecting Functions
protective