Current Position Restoration For Each Axis Type - Mitsubishi Electric MELSEC iQ-R Series User Manual

Current position restoration for each axis type

This section describes the current position restoration for each axis type.
Real drive axis
Each current position is restored as the following.
Current position
Feed machine value
Cumulative current position
Set position
■Current position restoration timing
When an object that constructs the absolute position system to execute the 64-bit current position restoration is required,
restoration is automatically executed at the initial communication with the slave device. For details of the absolute position
system to execute the 64-bit current position restoration, refer to the following.
Page 80 Absolute position system
The servo ON status is not established until the current position restoration is completed.
■Absolute position system
This section describes precautions for constructing the absolute position system in a real drive axis.
The following shows the absolute position system configuration when the drive unit is used as the servo amplifier.
⋅
Position command
⋅
Control command
Motion
system
Monitor data
Absolute
position
data
⋅
Current position of the driver
⋅
Home position
Restoration of the current position
A drive unit/servo motor which can detect the absolute position must be used to construct the absolute position system.
For details of the absolute position system setting of the drive unit side, refer to each drive unit manual.
Incremental system
Restored in "0".
The same value as restored feed machine position.
A value obtained by rounding the cumulative current value with the ring counter range.
Servo motor
Motor
M
Drive unit
Encoder
Backup
Absolute position system
PosRestoration_AbsPosBase is "3:
FeedMachinePosition"
Differs depending on the restoration method. For
details, refer to the following.
Page 80 Absolute position system
2 AXIS MANAGEMENT FUNCTIONS
2.6 Absolute Position Control
2
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