Mitsubishi Electric 800 Series Instruction Manual page 90

• 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
*1
Real sensorless 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
86 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:
• Terminal 4 functions by control
Speed control/torque control switchover (Pr.800 = "12")
Pr.858 setting
Speed control (MC signal-OFF)
0 (initial value) Speed command (AU signal-ON)
4 Torque limit (Pr.810 = "1")
9999 —
—: No function
NOTE
• Switching between the speed control and the torque control is always enabled regardless of the motor status: in a stop, in
running, or in DC injection brake.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.178 to Pr.189 (Input terminal function
Pr.450 Second applied motorpage 294
Pr.804 Torque command source selectionpage 117
Pr.807 Speed limit selectionpage 120
Pr.810 Torque limit input method selectionpage 100
Pr.858 Terminal 4 function assignmentpage 270
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
Advanced magnetic flux vector
control
Real sensorless vector control
PM sensorless vector control
Torque control (MC signal-ON)
Speed limit (AU signal-ON)
Torque command (Pr.804 = "0")
—
selection)page 283
Pr.453 to Pr.454
Pr.450 setting
settings
9999 —
— —
Induction motor —
Induction motor
Other than 9999
IPM/SPM motor
9999 —
*1
Same as Pr.71
Other than 9999
setting
Induction motor —
Induction motor
Other than 9999
IPM/SPM motor
4.1 Changing the control method and mode
1
2
Pr.451 setting
—
9999
3
40
20
10 to 12
4
10
—
Same as
5
Pr.800 setting
40
20
6
10 to 12
10
7
page 289.)
8
9
page
10
89
4. Control Method