Energy Saving Control - Mitsubishi Electric FR-A800 Series Instruction Manual

• An excitation current low-speed scaling factor set in the parameter shown in the table is used according to the Pr.14 setting
and other conditions.
Pr.14 setting
0 to 5
12
13
14
15
• When the SF-PR/SF-HR/SF-HRCA motor is used (Pr.71 = "40, 43, 44, 50, 53, 54, 70, 73, or 74") and "9999" is set in Pr.85/
Pr.86, the predetermined setting in the following table is applied.
Motor
capacity Pr.81 = "2"
(kW)
Pr.85
0.4 —
0.75 20 Hz
1.5 30 Hz
2.2 10 Hz
3.7 30 Hz
5.5 10 Hz
7.5 10 Hz
11 10 Hz
15 10 Hz
18.5 10 Hz
22 30 Hz
30 10 Hz
37 20 Hz
45 10 Hz
55 20 Hz

5.16.5 Energy saving control

Magnetic flux Magnetic flux Magnetic flux
V/F V/F V/F
The inverter will automatically perform energy saving operation without setting detailed parameters.
This control method is suitable for applications such as fans and pumps.
Pr.
60 Energy saving
G030 control selection
 Energy saving operation (Pr.60 = "4")
• Setting Pr.60 = "4" will select the energy saving operation.
• With the energy saving operation, the inverter will automatically control the output voltage so the inverter output power
during the constant-speed operation will become minimal.
• Energy saving operation will be enabled under V/F control.
 Optimum excitation control (Pr.60 = "9")
• Setting Pr.60 = "9" will select the Optimum excitation control.
• The Optimum excitation control is a control method to decide the output voltage by controlling the excitation current so the
efficiency of the motor is maximized.
• Optimum excitation control will be enabled under V/F control and Advanced magnetic flux vector control.
712
5. PARAMETERS
5.16 (G) Control parameters
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X17 signal
RT signal OFF
— Pr.86
— Pr.86
— Pr.617
OFF Pr.86
ON Pr.86
OFF Pr.617
ON Pr.86
SF-PR
Pr.81 = "4"
Pr.86 Pr.85 Pr.86
— — —
130% 20 Hz 130%
140% 10 Hz 130%
150% 10 Hz 130%
150% 25 Hz 133%
150% 10 Hz 130%
150% 30 Hz 118%
150% 20 Hz 140%
150% 30 Hz 130%
150% 30 Hz 130%
130% 10 Hz 130%
150% 20 Hz 130%
140% 10 Hz 140%
140% 20 Hz 130%
140% 30 Hz 130%
Name Initial value
0
search engine
During forward rotation
RT signal ON
Pr.566
Pr.566
Pr.617
Pr.566
Pr.566
Pr.617
Pr.566
Pr.81 = "6" Pr.81 = "2"
Pr.85 Pr.86 Pr.85
— — 10 Hz 130%
10 Hz 130% 10 Hz 130%
10 Hz 130% 10 Hz 130%
20 Hz 130% 20 Hz 150%
20 Hz 130% 30 Hz 160%
30 Hz 130% 30 Hz 140%
30 Hz 130% 30 Hz 140%
10 Hz 130% 30 Hz 140%
30 Hz 130% 20 Hz 140%
20 Hz 130% 30 Hz 150%
10 Hz 130% 30 Hz 150%
10 Hz 130% 30 Hz 150%
20 Hz 130% 20 Hz 160%
10 Hz 130% 10 Hz 130%
— — 10 Hz 140%
Setting range
0 Normal operation
4 Energy saving operation
9 Optimum excitation control
During reverse rotation
RT signal OFF RT signal ON
Pr.86 Pr.566
Pr.617 Pr.617
Pr.86 Pr.566
Pr.617 Pr.617
Pr.86 Pr.566
Pr.86 Pr.566
Pr.86 Pr.566
SF-HR/SF-HRCA
Pr.81 = "4"
Pr.86 Pr.85 Pr.86 Pr.85
10 Hz 130% 10 Hz
10 Hz 130% 10 Hz
10 Hz 130% 10 Hz
10 Hz 130% 10 Hz
30 Hz 140% 10 Hz
30 Hz 140% 20 Hz
30 Hz 140% 30 Hz
10 Hz 130% 30 Hz
10 Hz 130% 30 Hz
30 Hz 140% 30 Hz
30 Hz 140% 20 Hz
20 Hz 150% 10 Hz
20 Hz 150% 10 Hz
20 Hz 140% 10 Hz
20 Hz 150% —
Description
Pr.81 = "6"
Pr.86
130%
130%
130%
130%
130%
140%
150%
130%
130%
140%
140%
130%
130%
140%
—