Mitsubishi Electric FR-F800 Series Instruction Manual page 180

*4 When the inverter operation is switched to the test operation, the accumulated thermal value is reduced because the output current is considered
as 0.
Parameters referred to
Pr.52 Operation panel main monitor
Pr.158 AM terminal function
 Changing the control method with external terminals (RT signal, X18
signal)
• Control method (V/F control or Advanced magnetic flux vector control) can be switched using external terminals.
The control method can be switched using either 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. 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 parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign
the function to the terminal.
First motor control method
V/F control
Advanced magnetic flux vector control
PM motor control
*1 V/F control is set by turning ON the X18 signal. If the X18 signal is unassigned, the 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 is set to "9999". When Pr.450 is set to the IPM motor MM-EFS or MM-THE4, PM motor control is enabled
even if Pr.453 ≠ "9999" and 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 the 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.
Parameters referred to
Pr.178 to Pr.189 (Input terminal function
Pr.450 Second applied
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selectionpage 305
selectionpage 314
Second motor control method (RT
V/F control
Advanced magnetic flux vector control
PM motor control
Same control as the first motor
*1
V/F control
Advanced magnetic flux vector control
PM motor control
selection)page 373
motorpage 379
search engine
signal-ON)
9999
—
Induction motor
IPM/SPM motor
*1
9999
—
Induction motor
IPM/SPM motor
Pr.450 setting Pr.453, Pr.454 settings
—
*2
9999
Other than 9999
—
*2
9999
Other than 9999
5. PARAMETERS
5.2 Control method
1
2
3
4
5
6
7
8
9
10
page 377.)
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