Mitsubishi Electric 800 Series Instruction Manual page 386

*1 The initial value differs depending on the inverter capacity as follows. For the LD rating (Pr.570 = "1"), the initial value is changed. (Refer to
140).
FR-E820-0050(0.75K) or lower
FR-E820S-0050(0.75K) or lower
FR-E840-0026(0.75K) or lower
FR-E860-0017(0.75K)
FR-E820-0080(1.5K) to FR-E820-0175(3.7K)
FR-E840-0040(1.5K) to FR-E840-0095(3.7K)
FR-E820S-0080(1.5K) or higher
FR-E820-0240(5.5K) or higher
FR-E840-0120(5.5K) or higher
FR-E860-0027(1.5K) and FR-E860-0040(2.2K)
FR-E860-0061(3.7K) or higher
 Starting torque adjustment
• Assuming Pr.19 Base frequency voltage is 100%, set the output voltage at 0 Hz to Pr.0 (Pr.46) in percentage.
• Perform the adjustment of the parameter little by little (approximately 0.5%), and confirm the status of the motor each time.
The motor may overheat when the value is set too high. Do not use more than 10% as a guideline.
 Setting multiple torque boosts (RT signal, Pr.46)
• When changing the torque boost depending on the application or when using single inverter switching between multiple
motors, use the second torque boost.
• Pr.46 Second torque boost is enabled when the RT signal is ON. To input the RT signal, set "3" in any parameter from
Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
NOTE
• The RT signal is the Second function selection signal which also enables other second functions. (Refer to
• Set a larger value when the distance between the inverter and the motor is long or when there is not enough motor torque in
the low-speed range. It may cause overcurrent trip when it is set too large.
• Setting for Pr.0 and Pr.46 becomes enabled only when the V/F control is selected.
• When the initial value is set in Pr.0, the Pr.0 setting is automatically changed by changing the Pr.71 Applied motor or Pr.81
Number of motor poles setting. (Refer to
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.3 Base frequency, Pr.19 Base frequency
Pr.71 Applied motorpage 304
Pr.178 to Pr.189 (Input terminal function
Inverter
6%
5%
4%
3%
2%
100%
Output
voltage
Pr.0 Setting
Pr.46
range
0
page
voltagepage 386
selection)page 292
Initial value
Output Base
frequency
frequency
(Hz)
304.)
page
page 298.)
385
15.(G) Control Parameters
15.1 Manual torque boost
11
12
13
14
15
16
17
18
19
20