Encoder Position Tuning - Mitsubishi Electric FR-A820-00046 Instruction Manual

6.5

Encoder position tuning

• Encoder position tuning is required when a PM motor with an encoder is driven. The measured offset value between the
motor home magnetic pole position and the encoder home position is stored. Only encoder position tuning can be
performed when offline auto tuning is not required, such as when the parameters for motor constant are set manually, or
when offline auto tuning is already performed.
Pr. Name
373
Encoder position tuning setting/status
C142
1105
Encoder magnetic pole position offset
C143
 Before performing encoder position tuning
• Check that the FR-A8APA, a motor, and an encoder are properly connected.
• Check that a motor (single, stop status) is connected. (Check that the motor is not rotated by an external force during
tuning.)
• Check that the mechanical brake is released.
• Check that the vector control (speed control) for the PM motor with an encoder is selected (refer to
NOTE
• Encoder position tuning is required when a PM motor is used. (It is disabled when an induction motor is used.)
• When auto tuning is performed while Pr.96 = "101", offline auto tuning and encoder position tuning can be performed
at the same time (refer to
 Setting
• To perform tuning, set Pr.373 = "1".
Vector Vector Vector
Initial Setting
value range
0
0
1
0 to 4095
9999
9999
page 27).
Description
Encoder position tuning disabled.
Encoder position tuning enabled.
Encoder position tuning data set.
No encoder position tuning data.
VECTOR CONTROL
page 26).
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