Fuji Electric FRENIC-HVAC User Manual page 365

Curvilinear acceleration/deceleration
Acceleration/deceleration is linear below the base frequency (constant torque) but it slows
down above the base frequency to maintain a certain level of load factor (constant output).
This acceleration/deceleration pattern allows the motor to accelerate or decelerate with its
maximum performance.
• If you choose S-curve acceleration/deceleration or curvilinear acceleration/
deceleration
acceleration/deceleration times are longer than the specified ones.
• Specifying an improperly short acceleration/deceleration time may activate the
current limiter, torque limiter, or anti-regenerative control (automatic
deceleration), resulting in a longer acceleration/deceleration time than the
specified one.
F09 Torque Boost 1
Refer to the description of F37.
F10 to F12 Electronic Thermal Overload Protection for Motor 1
(Select motor characteristics, Overload detection level, Thermal time
constant)
F10 through F12 specify the thermal characteristics of the motor for its electronic thermal
overload protection that is used to detect overload conditions of the motor inside the inverter.
F10 selects the motor cooling mechanism to specify its characteristics, F11 specifies the
overload detection current, and F12 specifies the thermal time constant.
Upon detection of overload conditions of the motor, the inverter shuts down its output and
issues a motor overload alarm OL1 to protect motor 1.
Thermal characteristics of the motor specified by F10 and F12 are also used for the
overload early warning. Even if you need only the overload early warning, set these
characteristics data to these function codes. ( Refer to the description of E34.)
To disable the electronic thermal overload protection, set F11 data to "OFF."
For motors with PTC thermistor, connecting the PTC thermistor to the terminal
[C1] enables the motor overheat protective function. For details, refer to the
description of H26.
in Acceleration/Deceleration
6-55
6.3 Details of Function Codes
The figures at left show the
acceleration characteristics.
Similar characteristics apply to
the deceleration.
Pattern (H07), the actual
(Refer to F37.)