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Chapter 5
Chapter 5
Event ▶
▶
・Overload restriction
Overload restriction function
Overload restriction
in use
in use
・Frequency is being limited
Frequency is being limited
Frequency is being limited
Motor speed does
speed does
not increase
・Frequency source is low
Frequency source is low
Frequency source is low
・Acceleration time is long
Acceleration time is long
Acceleration time is long
・Several parameters are not
Several parameters are not
Several parameters are not
adequately set
adequately
・Big variation in the load
Big variation in the load
Big variation in the load
Output frequency
Output frequency
is unstable
・Supply voltage fluctuates
Supply voltage fluctuates
Supply voltage fluctuates
・V/f
V/f control is in use
・It is being used f
It is being used for lift down
It is being used f
No torque
application
application
・Very heavy
Very heavy load
In operation the
In operation the
・Large leakage current
circuit breaker gets
circuit breaker gets
Large leakage current
Large leakage current
activated
Noise interferes
interferes
・Irradiated noise from the
with the TVs and
with the TVs and
Irradiated noise from the
Irradiated noise from the
radios nearby the
radios nearby the
inverter
inverter
inverter
Estimated cause ▶
Estimated cause
function is
control is in use
lift down
load
Corrective action
Corrective action
・
If output current is high, the overload restriction function
If output current is high, the overload restriction function
If output current is high, the overload restriction function
If output current is high, the overload restriction function
If output current is high, the overload restriction function
[bA122] lowers the frequency. To increase the acceleration
[bA122] lowers the frequency.
[bA122] lowers the frequency.
time [AC120], it is necessary to suppress the current
time [AC120], it is necessary to suppress the current
time [AC120], it is necessary to suppress the current
time [AC120], it is necessary to suppress the current
time [AC120], it is necessary to suppress the current increase.
・The upper limit
The upper limit [bA102]
[bA102] setting may be low, and it should
be increased. The frequency limiting d
be increased. The frequency limiting d
be increased. The frequency limiting d
be increased. The frequency limiting does not make use of
the maximum frequency, but the upper limit function.
the maximum frequency, but the upper limit function.
the maximum frequency, but the upper limit function.
the maximum frequency, but the upper limit function.
the maximum frequency, but the upper limit function.
・Increase the frequency source or cancel any other high
Increase the frequency source or cancel any other high
Increase the frequency source or cancel any other high
Increase the frequency source or cancel any other high
Increase the frequency source or cancel any other high
priority frequency command such as jogging
priority frequency command such as jogging
priority frequency command such as jogging
priority frequency command such as jogging or multi
・Acceleration time
Acceleration time [AC120]
[AC120] setting is long, so will accelerate
really slowly. Shorten gradually the acceleration time.
really slowly. Shorten gradually the acceleration time.
really slowly. Shorten gradually the acceleration time.
really slowly. Shorten gradually the acceleration time.
really slowly. Shorten gradually the acceleration time.
・Check for the motor basic parameters.
Check for the motor basic parameters.
Check for the motor basic parameters.
Check for the motor basic parameters.
・Review the power capacity of both the inverter and motor.
Review the power capacity of both the inverter and motor.
Review the power capacity of both the inverter and motor.
Review the power capacity of both the inverter and motor.
Review the power capacity of both the inverter and motor.
・To keep to a
To keep to a minimum
minimum the supply fluctuations, by using an
optional AC reactor, DC choke or and input filter,
optional AC reactor, DC choke or and input filter,
optional AC reactor, DC choke or and input filter,
optional AC reactor, DC choke or and input filter,
optional AC reactor, DC choke or and input filter,
improvement is possible.
improvement is possible.
improvement is possible.
・Can switch in
Can switch in [AA121]
[AA121] to torque boost, sensorless vector
to torque boost, sensorless vector
to torque boost, sensorless vector
control, ... etc.
control, ... etc.
・If the torque in the regenerative operation is not enough,
If the torque in the regenerative operation is not enough,
If the torque in the regenerative operation is not enough,
If the torque in the regenerative operation is not enough,
If the torque in the regenerative operation is not enough,
you can use a braking resistor or regenerative braking unit
you can use a braking resistor or regenerative braking unit.
you can use a braking resistor or regenerative braking unit
you can use a braking resistor or regenerative braking unit
you can use a braking resistor or regenerative braking unit
・Review the capacity of both the inverter and motor.
Review the capacity of both the inverter and motor.
Review the capacity of both the inverter and motor.
Review the capacity of both the inverter and motor.
Review the capacity of both the inverter and motor.
・Lower the carrier frequency
Lower the carrier frequency [bb101]
Lower the carrier frequency
・Increase the current sensitivity of the circuit breaker, or
Increase the current sensitivity of the circuit breaker, or
Increase the current sensitivity of the circuit breaker, or
Increase the current sensitivity of the circuit breaker, or
Increase the current sensitivity of the circuit breaker, or
replace the sensitivity current sensor/part.
replace the sensitivity current sensor/part.
replace the sensitivity current sensor/part.
replace the sensitivity current sensor/part.
・If possible, separate the wiring from the TV and radio
If possible, separate the wiring from the TV and radio
If possible, separate the wiring from the TV and radio
If possible, separate the wiring from the TV and radio
If possible, separate the wiring from the TV and radio
・Put a zero
Put a zero-phase reactor either in the main supply input or
phase reactor either in the main supply input or
phase reactor either in the main supply input or
phase reactor either in the main supply input or
phase reactor either in the main supply input or
in the output
in the output
5-6
Troubleshooting
Troubleshooting
Troubleshooting
o increase the acceleration
o increase the acceleration
setting may be low, and it should
setting may be low, and it should
oes not make use of
oes not make use of
or multi-speed.
setting is long, so will accelerate
setting is long, so will accelerate
setting is long, so will accelerate
the supply fluctuations, by using an
the supply fluctuations, by using an
the supply fluctuations, by using an
[bb101]
.
.
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