Mitsubishi Electric FR-A800 Series Instruction Manual page 227

• 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. Use this method to switch the control
method for one motor. At this time, the second functions including the electronic thermal O/L relay characteristic are not
changed. (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.
First motor control method
V/F control
Advanced magnetic flux vector control
Real sensorless vector control
*1
Vector control
PM sensorless vector control
*1 V/F control is set by turning ON the X18 signal.
*2 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".
NOTE
• The RT signal is assigned to the terminal RT in the initial status. Set "3" in one of Pr.178 to Pr.189 (Input terminal function
selection) to assign the RT signal to another terminal.
• The RT signal is a second function selection signal. The RT signal also enables other second functions. (Refer to
• The control method could be changed by external terminals (RT signal, X18 signal) while the inverter is stopped. If a signal is
switched during the operation, the control method changes after the inverter stops.
 Switching between two encoder-equipped motors (Pr.862)
• Using the Vector control compatible plug-in options together with the control terminal option (FR-A8TP) enables the Vector
control operation by switching between two encoder-equipped motors according to the RT signal. Use Pr.862 Encoder
option selection to set the combination of the motors (first/second), plug-in option, and control terminal option.
Pr.862 Encoder option
selection
0 (initial value)
1
*1 When Pr.450 Second applied motor ="9999", the first motor is selected even if the RT signal turns ON.
NOTE
• Pr.862 setting is valid even when either the plug-in option or control terminal option is installed. For using the control terminal
option alone, the motor does not run when Pr.862 is the initial value as it is. (When the RT signal is OFF)
 Changing the control mode with external terminals (MC signal)
• The setting of Pr.800 or Pr.451 can be used to switch the control mode by turning ON/OFF the MC signal. Refer to
223 to set Pr.800 or Pr.451.
To input the MC signal, set "26" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
226
5. PARAMETERS
5.2 Control method
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Second motor control method
(RT signal-ON)
V/F control
Advanced magnetic flux vector
control
Real sensorless vector control
Vector control
PM sensorless vector control,
Same control as the first motor
V/F control
Advanced magnetic flux vector
*1
control
*1
Real sensorless vector control
Vector control
PM sensorless vector control,
RT signal-OFF
(First motor)
Plug-in option
Control terminal option
search engine
Pr.450 setting
9999
—
—
Induction motor
Induction motor
IPM/SPM motor
IPM/SPM motor
*1
9999
—
Induction motor
Induction motor
IPM/SPM motor
IPM/SPM motor
RT signal-ON
*1
(Second motor)
Control terminal option
Plug-in option
Pr.453 to Pr.454
Pr.451 setting
settings
— —
— 9999
*2
—
9999
20
10 to 14
0 to 6, 100 to
Other than 9999
106
0, 3, 4, 6
Other than
9999
— —
*2
—
9999
20, 9999
10 to 14
0 to 6, 100 to
Other than 9999
106
0, 3, 4, 6
Other than
9999
page 525.)
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