Explanations Of Parameters; Manual Torque Boost; Base Frequency, Voltage; Maximum/Minimum Frequency - Mitsubishi Electric FR-A700 Manual

Explanations of Parameters

The abbreviations in the explanations below are as follows:
Sensorless Sensorless Sensorless ...real sensorless vector control,
(Parameters without any indication are valid for all control)
Pr.
Pr.
0, 46, 112

Manual torque boost

Pr.0 Torque boost
Pr.112 Third torque boost
A voltage drop in the low-frequency region can be compensated to
improve the motor torque reduction in the low speed range.
Motor torque in the low-frequency range can be adjusted to the load
to increase the starting motor torque.
Three kinds of starting torque boost can be switched by using
terminal RT and X9 signal.
This function is valid for V/F control only.
100%
Output
voltage
Pr.0
Setting
Pr.46
range
Pr.112
0 Output
frequency
(Hz)
Pr.
Pr.
1, 2, 18

Maximum/minimum frequency

Pr.1 Maximum frequency
Pr.18 High speed maximum frequency
Motor speed can be limitted.
Clamp the upper and lower limits of the output frequency.
To perform operation above 120Hz (60Hz for the75K or more), set
the maximum output frequency in Pr.18.
(When Pr.18 is set, Pr.1 is automatically changed to the frequency
set in Pr.18. Also, when Pr.1 is set, Pr.18 is automatically changed to
the frequency set in Pr.1.
Pr.18 is valid only under V/F control and advanced magnetic flux
vector control.
The maximum frequency is valid for the speed command obtained
from the droop pulses during position control under vector control.
The minimum frequency is invalid.
Output frequency
(Hz)
Pr.1
Pr.18
Pr.2
0
(4mA)
Clamped at the
minimum frequency
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Vector Vector Vector ...vector control
V/F V/F V/F
Pr.46 Second torque boost
When Using the
Pr.0 Initial Value Constant
Torque Motor
←
0.4K, 0.75K 6%
←
1.5K to 3.7K 4%
5.5K, 7.5K 3% 2%*
←
2%
11K to 55K
1% ←
75K or more
* If the Pr.71 initial value is
Base
changed to the setting for use
frequency
with a constant-torque motor,
the Pr.0 setting changes to the
corresponding value in the
above table.
Pr.2 Minimum frequency
Clamped at the
maximum frequency
Frequency setting
5, 10V
(20mA)
V/F V/F V/F ...V/F control,
Magnetic flux Magnetic flux Magnetic flux
Pr.
Pr.
3, 19, 47, 113

Base frequency, voltage

Pr.3 Base frequency
Pr.47 Second V/F (base frequency)
Used to adjust the inverter outputs (voltage, frequency) to the motor
rating.
When running a standard motor, generally set the rated frequency of
the motor in Pr.3 Base frequency. When running the motor using
commercial power supply-inverter switch-over operation, set Pr.3 to
the same value as the power supply frequency.
When you want to change the base frequency when switching multiple
motors with one inverter, etc., use the Pr.47 Second V/F (base frequency)
and Pr.113 Third V/F (base frequency) .
Use Pr.19 Base frequency voltage to set the base voltage (e.g. rated
motor voltage).
This function is valid for V/F control only.
Pr.19
Pr.
Pr.
4 to 6, 24 to 27, 232 to 239
Multi-speed setting operation
Pr.4 Multi-speed setting (high speed)
Pr.6 Multi-speed setting (low speed)
Pr.25 Multi-speed setting (speed 5)
Pr.27 Multi-speed setting (speed 7)
Pr.233 Multi-speed setting (speed 9)
Pr.235 Multi-speed setting (speed 11)
Pr.237 Multi-speed setting (speed 13)
Pr.239 Multi-speed setting (speed 15)
Can be used to change the preset speed in the parameter with the
contact signals.
Any speed can be selected by merely turning on-off the contact
signals (RH, RM, RL, REX signals).
The inverter operates at frequencies set in Pr.4 when RH signal is
on, Pr.5 when RM signal is on and Pr.6 when RL signal is on.
Frequency from 4 speed to 15 speed can be set according to the
combination of the RH, RM, RL and REX signals. Set the running
frequencies in Pr.24 to Pr.27, Pr.232 to Pr.239 (In the initial value
setting, speed 4 to speed 15 are unavailable)
Speed 1
(High speed)
Speed 5
Speed 2
(Middle speed)
Speed 4
Speed 3
(Low speed)
ON
RH
ON ON
RM
ON ON
RL
*1 When "9999" is set in Pr.232 Multi-speed setting (speed 8), operation is
performed at frequency set in Pr.6 when RH, RM and RL are turned off
and REX is turned on.
...advanced magnetic flux vector control,
V/F V/F V/F
Pr.19 Base frequency voltage
Pr.113 Third V/F (base frequency)
Output frequency
(Hz)
Pr.3
Pr.47
Pr.113
Pr.5 Multi-speed setting (middle speed)
Pr.24 Multi-speed setting (speed4)
Pr.26 Multi-speed setting (speed 6)
Pr.232 Multi-speed input compensation selection
Pr.234 Multi-speed setting (speed 10)
Pr.236 Multi-speed setting (speed 12)
Pr.238 Multi-speed setting (speed 14)
Speed 10
Speed 11
Speed 12
Speed 9
Speed 6
Speed 13
Speed 8
Speed 7
Time ON ON ON ON
RH
ON ON ON
ON ON
RM
ON ON
ON ON ON
RL
ON
ON ON ON ON ON ON ON ON
REX
*1
Speed 14
Speed 15
Time
ON ON
ON
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