Mitsubishi Electric 800 Series Instruction Manual page 149

 Changing the control method with external terminals (RT signal, X18
signal)
• Control method (V/F control, Advanced magnetic flux 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. 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) 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.
First motor control method
V/F control
Advanced magnetic flux vector
*1
control
PM motor control
*1 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.
*2 V/F control is set when Pr.453 or Pr.454 = "9999".
NOTE
• 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
348.)
• 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.
Parameters referred to
Pr.178 to Pr.189 (Input terminal function
Pr.450 Second applied
148
5. PARAMETERS
5.2 Control method
Second motor control method
(RT signal-ON)
V/F control
Advanced magnetic flux vector
control
PM motor control
Same control as the first motor
V/F control
Advanced magnetic flux vector
control
PM motor control
selection)page 343
motorpage 351
Pr.450 setting value
9999
―
Induction motor
IPM/SPM motor
9999
*1
―
Induction motor
IPM/SPM motor
Pr.453, Pr.454 setting
value
―
*2
9999
Other than 9999
―
*2
9999
Other than 9999
page