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

Page: 270 / 1218

Control method Parameters
5 - 68
Changing the control method with external terminals (RT signal, X18 signal)
●
Control method (V/F control, Advanced magnetic flux vector control, Real sensorless vector
control, Vector control,) can be switched among using external terminals.
The control method can be either switched using the Second function selection (RT) signal or the
V/F switchover (X18) signal.
●
When using the RT signal, set the second motor in Pr. 450 "Second applied motor" and set the
second motor's control method in Pr. 451 "Second motor control method selection". Turning ON
the RT signal enables the second function, enabling the switchover of the control method.
●
When using the X18 signal, turning ON the X18 signal switches the presently-selected control
method (Advanced magnetic flux vector control, Real sensorless vector control, vector control) to
the V/F control. At this time, the second functions including electronic thermal characteristic are
not changed. Use this method to switch the control method for one motor. (To switch the second
functions, use the RT signal.)
To input the X18 signal, set "18" in any of Pr. 178 to Pr. 189 (input terminal function selection) to
assign the function.
V/F control is set by turning ON the X18 signal. If the X18 signal is unassigned, RT signal performs
the same function; Turning ON the RT signal selects V/F control.
V/F control when Pr. 453 or Pr. 454 is set to "9999" regardless of the Pr. 451 setting. When Pr. 450 is
set to the IPM motor MM-CF, PM sensorless vector control is enabled even if Pr. 453 ≠ "9999" or
Pr. 454 = "9999".
First motor control method
Second motor control
method (RT signal-ON) Pr. 450 setting
value
Pr. 453, Pr. 454
setting value
Pr. 451 setting
value
V/F control
V/F control
9999
⎯ ⎯
⎯ ⎯
9999
⎯
9999
⎯
Advanced magnetic flux
vector control
Induction motor
Other than 9999
20
Real sensorless vector control 10 to 14
Vector control
Induction motor 0 to 6, 100 to 106
IPM/SPM motor Other than 9999
PM sensorless vector control IPM/SPM motor Other than 9999
Advanced magnetic flux vector
control
Real sensorless vector control
Vector control
PM sensorless vector control
Same control as the first
motor
9999
⎯ ⎯
V/F control
⎯
9999
⎯
Advanced magnetic flux
vector control
Induction motor
Other than 9999
20, 9999
Real sensorless vector control 10 to 14
Vector control
Induction motor 0 to 6, 100 to 106
IPM/SPM motor Other than 9999
PM sensorless vector control IPM/SPM motor Other than 9999
Tab. 5-20: Control of the first and second motor