Nidec Control Techniques HVAC Drive H300 HMI Bypass, Installation And Commissioning Manual

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26 HMI Bypass Controller Installation and Commissioning Guide
3.2.3 Advanced VFD Settings
The Advanced VFD Settings menu allows access to advanced settings of the
VFD.
Voltage Boost : Defines the level of voltage boost at 0Hz when using a fixed V
to F relationship.
Current Limit : Limits the current when the motor is being accelerated or
decelerated.
Open-Loop Control Mode : Defines the VFD output mode. The default setting
for Open-Loop Control Mode is “Fixed” or V/Hz.
• Ur S : Resistance compensation, stator resistance measured at each start.
• Ur : Resistance compensation with no stator resistance measurement.
• Fixed : (Default) Fixed boost with a linear characteristic. Also known as V/
Hz Boost mode.
• UR Auto : Resistance compensation, stator resistance measured on the first
start.
• Ur I : Resistance compensation, stator resistance measured at power-up.
Also known as Open-Loop Vector mode.
• Square : Fixed boost with square characteristic. Also known as Quadratic
Motor V/Hz mode.
• Current 1P : Single phase current output.
Note: For further information on Open-Loop control modes refer to the HVAC
H300 User Guide.
Reverse Motor Direction : If Reverse Motor Direction is on, the output phase
sequence is reversed so that the phase sequence in W-V-U for positive
frequencies and U-V-W for negative frequencies.
Dynamic V to F : Dynamic V to F is intended for applications where power
loss should be kept to a minimum under low load conditions, but dynamic
performance is not important. The setting is enabled by default.