EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

F03 Maximum Frequency 1
F03 specifies the maximum frequency to limit the output frequency. Specifying the maximum frequency exceeding
the rating of the equipment driven by the inverter may cause damage or a dangerous situation. Make sure that the
maximum frequency setting matches the equipment rating.
- Data setting range: 25.0 to 500.0 (Hz)
• For variable torque mode inverters, set the maximum frequency at 120 Hz or below.
• Under vector control with speed sensor, set the maximum frequency at 200 Hz or below, and under
vector control without speed sensor, at 120 Hz or below.
• If a setting exceeding the maximum setting value (e.g., 500 Hz) is made, the reference speed and
analog output (FMA) will be based on the full scale/reference value (10V/500 Hz). However, the
frequency is internally limited. Even if 10 V is inputted, the frequency 500 Hz will be internally limited to
200 Hz.
The inverter can easily accept high-speed operation. When changing the speed setting, carefully check the
specifications of motors or equipment beforehand.
Otherwise injuries could occur.
Modifying F03 data to allow a higher reference frequency requires also changing F15 data specifying a
frequency limiter (high).
F04 to F05
F06
Base Frequency 1, Rated Voltage at Base Frequency 1
Maximum Output Voltage 1
H50, H51 (Non-linear V/f Pattern 1 (Frequency and Voltage))
H52, H53 (Non-linear V/f Pattern 2 (Frequency and Voltage))
H65, H66 (Non-linear V/f Pattern 3 (Frequency and Voltage))
These function codes specify the base frequency and corresponding voltage at the base frequency essentially
required for running the motor properly. If combined with the related function codes H50 through H53, H65 and
H66, these function codes may customize the non-linear V/f pattern by specifying increase or decrease in voltage
at any point on the V/f pattern.
The following description includes setups required for the non-linear V/f pattern.
At high frequencies, the motor impedance may increase, resulting in an insufficient output voltage and a decrease
in output torque. To prevent this problem use F06 (Maximum Output Voltage 1) to increase the voltage. Note,
however, that the inverter cannot output voltage exceeding its input power voltage.
V/f point
Function code
Frequency Voltage
Remarks
The setting of the maximum output voltage is
Maximum frequency F03 F06
disabled when the auto torque boost, torque vector
control, vector control without speed sensor, or
vector control with speed sensor is selected.
Base frequency F04 F05
Non-linear V/f pattern 3 H65 H66 Disabled when the auto torque boost, torque vector
Non-linear V/f pattern 2 H52 H53 control, vector control without speed sensor, or
Non-linear V/f pattern 1 H50 H51 vector control with speed sensor is selected.
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