Limit The Output Frequency; Maximum And Minimum Frequency (Pr. 1, Pr. 2, Pr. 18) - Mitsubishi Electric FR-E700 Series Instruction Manual

Limit the output frequency

6.4 Limit the output frequency
Purpose
Set upper limit and lower limit of output fre-
quency
Perform operation by avoiding machine res-
onance points
6.4.1

Maximum and minimum frequency (Pr. 1, Pr. 2, Pr. 18)

You can limit the motor speed. Clamp the upper and lower limits of the output frequency.
Pr.
Name
No.
1
Maximum frequency
2
Minimum frequency
18
High speed maximum frequency
The above parameter can be set when Pr. 160 "User group read selection" = 0.
Set the maximum frequency
Set the upper limit of the output frequency in Pr. 1 "Maximum frequency". If the frequency of the fre-
quency command entered is higher than the setting, the output frequency is clamped at the maxi-
mum frequency.
When you want to perform operation above 120Hz, set the upper limit of the output frequency to Pr.
18 "High speed maximum frequency". (When Pr. 18 is set, Pr. 1 automatically switches to the frequen-
cy of Pr. 18. When Pr. 18 is set, Pr. 18 automatically switches to the frequency of Pr. 1.)
frequency [Hz]
Pr. 1
Pr. 18
Clamped at the
minimum frequency
NOTE When performing operation above 50Hz using the frequency setting analog signal, change Pr. 125
(Pr. 126) "Frequency setting gain". (Refer to section 6.16.3.) If only Pr. 1 or Pr. 18 is changed, opera-
tion above 50Hz cannot be performed.
6 - 50
Setting
Initial Value
Range
120Hz 0–120Hz
0Hz 0–120Hz
120Hz 120–400Hz
Output
Pr. 2
0 5, 10V
(4mA) (20mA)
Parameters that must be set
Maximum/minimum frequency
Frequency jump
Description
Set the upper limit of the output fre-
quency.
Set the lower limit of the output fre-
quency.
Set when performing the operation at
120Hz or more
Fig. 6-10:
Clamped at the
Maximum and minimum output frequency
maximum frequency
Frequency
setting
Parameter
Refer to
Section
Pr. 1, Pr. 2, 6.4.1
Pr. 18
Pr. 31–Pr. 36 6.4.2
Refer to
Parameters referred to
Section
13 Starting frequency 6.7.2
15 Jog frequency 6.6.2
125 Terminal 2 frequency 6.16.3
setting gain frequency
126 Terminal 4 frequency 6.16.3
setting gain frequency
I001100E