Mitsubishi Electric 800 Series Instruction Manual (Function page 109

• 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 or X18 signal enables the second function, enabling the
switchover of the control method.
• To input the RT signal, set "3" in any parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign the
function.
To input the X18 signal, set "18" in any parameter from 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.
NOTE
• The RT signal is a second function selection signal. The RT signal also enables other second functions. (Refer to
• When V/F control is set using the V/F switchover (X18) signal, the second functions are selected at the same time.
• 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.
 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
104 to set Pr.800 or Pr.451.
To input the MC signal, set "26" in any parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign
the function.
• When using an analog input terminal (terminal 4) for torque limit and torque command, switching of the control mode
changes the terminal function as follows:
Speed control / torque control
Pr.858
setting
Speed control
(MC signal-OFF)
0 (initial Speed command
value) (AU signal-ON)
Torque limit
4
(Pr.810 = "1")
Torque bias input
6
(Pr.840 = "1 to 3")
9999 —
—: No function
*1 Real sensorless vector control (Pr.800 = "12"), Vector control (Pr.800 = "2")
*2 Vector control (Pr.800 = "4")
*3 Vector control (Pr.800 = "5")
108
4. Control Method
4.2 Changing the control method and mode
Second motor control method
(RT/X18 signal-ON)
V/F control
Advanced magnetic flux vector
control
Real sensorless vector control
PM sensorless vector control
Same control as the first motor
*1
V/F control
*1
Advanced magnetic flux vector
control
Real sensorless vector control
PM sensorless vector control
*1
switchover
Torque control Speed control
(MC signal-ON) (MC signal-OFF)
Speed limit Speed command
(AU signal-ON) (AU signal-ON)
Torque command Torque limit
(Pr.804 = "0") (Pr.810 = "1")
Torque bias input
—
(Pr.840 = "1 to 3")
— —
Pr.450 setting
9999
—
Induction motor
Induction motor
IPM/SPM motor
9999
*1
Same as Pr.71
setting
Induction motor
Induction motor
IPM/SPM motor
Speed control / position control
*2
switchover
Position control
(MC signal-ON)
—
Torque limit
(Pr.810 = "1")
—
—
Pr.453 to Pr.454
Pr.451 setting
settings
— —
— 9999
— 40
20
Other than 9999
10 to 12
10
— —
Other than 9999 Same as
Pr.800 setting
— 40
20
Other than 9999
10 to 12
10
page
Position control / torque control
*3
switchover
Position control Torque control
(MC signal-OFF) (MC signal-ON)
Speed limit
—
(AU signal-ON)
Torque limit Torque command
(Pr.810 = "1") (Pr.804 = "0")
— —
— —
374.)
page