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Output Frequency Range (pr. 1, Pr. 2, Pr. 18) - Mitsubishi Electric FR-A500 Instruction Manual

Transistorized inverter.
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4.2.2

Output frequency range (Pr. 1, Pr. 2, Pr. 18)

Pr. 1 "maximum frequency"
Pr. 2 "minimum frequency"
Pr. 18 "high-speed maximum frequency"
Used to clamp the upper and lower limits of the output frequency. Used for high-speed operation at or over
120Hz.
Can be used to set the upper and lower limits of motor speed.
Parameter
Factory Setting
Number
1
2
18
<Setting>
• Use Pr. 1 to set the upper limit of the output frequency. If the frequency of the frequency command entered
is higher than the setting, the output frequency is clamped at the maximum frequency.
• To perform operation over 120Hz, set the upper limit of the output frequency in Pr. 18.
(When the Pr. 18 value is set, Pr. 1 automatically changes to the frequency in Pr. 18. Also, setting the Pr. 1
value automatically changes the Pr. 18 value to the frequency in Pr. 1.)
• Use Pr. 2 to set the lower limit of the output frequency.
Note: When the frequency setting analog signal is used to run the motor beyond 60Hz, change the Pr. 903
and Pr. 905 values. If Pr. 1 or Pr. 18 is only changed, the motor cannot run beyond 60Hz.
When the Pr. 2 setting is higher than the Pr. 13 "starting frequency" value, note that the
motor will run at the preset frequency according to the acceleration time setting by
merely switching the start signal on, even if the command frequency has not been enterd.
Setting Range
120Hz
0 to 120Hz
0Hz
0 to 120Hz
120Hz
120 to 400Hz
Related parameters
Pr. 13 "starting frequency"
Pr. 903 "frequency setting voltage gain"
Pr. 905 "frequency setting current gain"
Output frequency (Hz)
Pr.1
Pr.18
Pr.2
CAUTION
72
PARAMETERS
Frequency setting
0
5,10V
(4mA)
(20mA)

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