Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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Parameters (G) Control parameters
FR-A800 5 - 695
Switching applied load selection with a terminal (Pr. 14 = "4, 5")
●
It is possible to switch between for constant-torque load and for lift with RT signal or X17 signal.
●
To input the X17 signal, set "17" in any of Pr. 178 to Pr. 189 (input terminal function selection) to
assign the function.
●
Switching with RT signal will become disabled when X17 signal is assigned.
Excitation current low-speed scaling factor (Pr. 14 = 12 to 15)
●
Under Advanced magnetic flux vector control or Real sensorless vector control, excitation current
in the low-speed range can be increased to improve torque. When Pr.14 = "12 to 15", the excitation
current scaling factor can be switched for the forward/reverse rotation.
●
Increased excitation is applied when the output frequency is equal to or lower than the setting in
Pr. 85 "Excitation current break point". The excitation current scaling factor at 0 Hz is set in Pr. 86.
Use Pr. 565 "Second motor excitation current break point" and Pr. 566 "Second motor excitation
current low-speed scaling factor" for the setting for using the second motor (RT signal-ON).
●
When Pr. 14 = "14 or 15" and the X17 signal is turned ON, the excitation current scaling factor is
switched from the value set in Pr. 617 to the value set in Pr. 86.
●
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 RT (X17) signal Output characteristics
4
ON For constant-torque load (same as setting value "0")
OFF For lift, boost at reverse rotation 0% (same as setting value "2")
5
ON For constant-torque load (same as setting value "0")
OFF For lift, boost at forward rotation 0% (same as setting value "3")
Tab. 5-315: Load selection by terminal
I003101E
Fig. 5-344: Operation example for the excitation current scaling factor
Excitation current scaling factor
Output frequency Pr. 85
(Pr. 565)
0
100%
Pr. 86
(Pr. 566)