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"A" Group: Standard Functions Section 3-5
3-5-9 PID Sleep Function
The inverter shuts off the output when the PID output becomes less than the
specified value (
A156) in case of PID is set enabled, or shuts off when the fre-
quency command becomes less than the specified value in case of PID is set
disabled. And if the PID output or frequency command exceeds the specified
value (
A156) for a specified period (A157), inverter automatically restarts the
operation. This is the PID sleep function.
• PID Sleep function is always enabled, even the PID function is disabled.
3-5-10 Automatic Voltage Regulation (AVR) Function
The automatic voltage regulation (AVR) feature keeps the inverter output
waveform at a relatively constant amplitude during power input fluctuations.
This can be useful if the installation is subject to input voltage fluctuations.
However, the inverter cannot boost its motor output to a voltage higher than
the power input voltage. If you enable this feature, be sure to select the proper
voltage class setting for your motor.
Note The motor behave as generator during deceleration and the energy is regen-
erated to the drive. As a result, the DC voltage in the inverter increases and
cause over-voltage trip when exceeding the OV level. When the voltage is set
high, deceleration time can be set shorter thanks to the energy consumption
due to the increase of losses in inverter. In order to set deceleration time
shorter without over-voltage trip, please try to set AVR off during deceleration
or to tune the AVR filter time constant and AVR deceleration gain.
PID output
A157 A157
Run command (internal)
Run Stop Run
Run command (external)
Run
PID sleep function action delay time
PID sleep function
triggering level A156
"A" Function Run
Mode
Edit
Defaults
Func.
Code
Name Description EU Units
A081 AVR function select Automatic (output) voltage regula-
tion, selects from three type of
AVR functions, three option
codes:
00... AVR enabled
01... AVR disabled
02... AVR enabled except during
deceleration
8 02 –
a281 AVR function select, 2
nd
motor 8 02 –
A082 AVR voltage select 200V class inverter settings:
200/215/220/230/240
400V class inverter settings:
380/400/415/440/460/480
8 230/
460
V
a282 AVR voltage select, 2
nd
motor 8 230/
460
V
a083 AVR filter time constant Define the time constant of the
AVR filter, range is 0 to 10 sec.
8 0.30 sec
a084 AVR deceleration gain Gain adjustment of the braking
performance, range is 50 to 200%
8 100. %
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