Allen-Bradley 1407-CGCM, Руководство пользователя, Страница: 83 / 252

Rockwell Automation Publication 1407-UM001H-EN-P - November 2014
CGCM Unit Configuration #HAPTER
6OLTS(Z4AB
The Volts/Hz tab is used to configure the unit’s settings related to operation of
the Volts/Hz compensation function. The parameters define a curve, which
determines the Volts/Hz response.
•
Volts per Hertz Upper Knee Frequency - Establishes the frequency at
which the V/Hz characteristic starts to reduce the generator voltage as a
function of generator frequency. Tag
VperHz_HiKneeFreq in the
configuration table stores this value, expressed in Hertz. The upper knee
frequency must be greater than the lower knee frequency.
•
Volts per Hertz Upper Slope - Establishes the rate at which the V/Hz
characteristic reduces the generator voltage as a function of generator
frequency between the upper and lower knee frequencies. Tag
VperHz_HiSlope in the configuration table stores this value, expressed as
a number that reflects per unit change in voltage for each per unit change
in frequency.
•
Volts per Hertz Lower Knee Frequency - Establishes the frequency at
which the V/Hz characteristic starts to reduce the generator voltage at the
lower slope rate as a function of generator frequency. Tag
VperHz_LoKneeFreq in the configuration table stores this value,
expressed in Hertz. The lower knee frequency must be less than the upper
knee frequency.
•
Volts per Hertz Lower Slope - Establishes the rate at which the V/Hz
characteristic reduces the generator voltage as a function of generator
frequency below the Lower Knee Frequency setting. Tag
VperHz_LoSlope in the configuration table stores this value, expressed as
a number that reflects per unit change in voltage for each per unit change
in frequency.