Signal Loss Detection Of Encoder Signals - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

• Perform tuning using Pr.574 Second motor online auto tuning.
• Pr.574 is enabled when the Second function selection (RT) signal is turned ON.
Pr.
450
453
454
*1 If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies may deteriorate due
to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
NOTE
• The RT signal is the Second function selection signal. The RT signal also enables other second functions. (Refer to
The RT signal is assigned to 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.
• 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.9 Electronic thermal O/L
Pr.71 Applied motorpage 505
Pr.80 Motor capacitypage
Pr.81 Number of motor polespage
Pr.96 Auto tuning setting/statuspage
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
Pr.800 Control method selectionpage 215

5.13.5 Signal loss detection of encoder signals

Magnetic flux Magnetic flux Magnetic flux Vector Vector Vector
V/F V/F V/F
Signal loss detection (E.ECT) is turned ON to shut off the inverter output when the encoder signal is lost during encoder
feedback control or orientation control operation or under Vector control.
Pr.
376 855
*1 *2
C148 C248
*1 The setting is available when a Vector control compatible plug-in option is installed.
*2 These parameters are available when the control terminal option (FR-A8TP) is installed.
530
5. PARAMETERS
5.13 (C) Motor constant parameters
Applied motor
Motor capacity (with the rated motor current equal to or less than the inverter rated current)
Number of motor poles
relaypage 394
215, page 509, page 519
215, page 509, page 519
509, page 519
selection)page 496
selection)page 450
Name
Encoder signal loss
detection enable/ 0
disable selection
Description
Initial value Setting range
0
1
*1
page
Description
Signal loss detection disabled
Signal loss detection enabled
496.)