Mitsubishi Electric MELDAS 600M Series Instruction Manual page 400

4.3 Procedures for initializing for the dog-type absolute position detection
Zero point initialization is carried out by executing dog-type reference point return with the manual
reference point return mode or the automatic reference point return command (G28).
Only "Status" and "27003 Move amnt in pwr OFF" are valid on the Zero point set screen.
1. Select the Zero point set screen.
2. Carry out manual or automatic dog-type reference point
return. (Notes 1, 2)
3. When the reference point is reached, the absolute position
basic point will be memorized.
The zero point is initialized at this stage. (Notes 3, 4)
4. After all axes have been returned to the zero point, output the
parameters.
(Note 1) If the execution of the dog-type reference point return is interrupted by resetting, etc., the
(Note 2) With dog-type reference point return, even if "∗" is displayed at "Status", reference point
(Note 3) The required data is stored in the SRAM when the absolute position basic point is
(Note 4) The "R0" and "P0" values displayed on the Amp monitor (servo unit) screen are stored in
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CHAPTER 3 MAINTENANCE
4. Absolute Position Detection
Operation procedure
Dog
Grid point
Encoder Z-phase
previous state (0 or ∗) will appear at "Status".
return can be carried out again.
established.
the SRAM.
R0 : Detector's multi-rotation counter value at grid point.
P0 : Position within one detector rotation at grid point.
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"Status" display on Zero point set
"0" will appear at "Status" for the axis for
which the zero point has not been
initialized.
When the absolute position basic point
memorizing process is completed, "∗" will
appear.
Reference point
Grid point Zero point shift
G28sft
III – 14
screen