Mitsubishi Electric MELDAS 600M Series Instruction Manual page 399

4.2 Starting up absolute position detection
(1) When the absolute position basic point has not been established.
When the zero point has not been initialized, or when the absolute position has been lost after
initialization, an error or warning will occur.
In this state, the coordinate system will not be set, so limits will be applied in each modoe. Thus,
carry out zero point initialization to establish the coordinate system.
Memory, tape, MDI
JOG feed, rapid traverse, handle, stop
Reference point return
(Note 1) The program error "PR0430 Return incomplete axis exists" will occur.
(Note 2) Automatic start is not possible.
(2) Selecting the zero point initialization method
Select the zero point initialization method with the following parameters.
130041 Abs on∗
(Axis spec param screen)
270005 No stopper
(Zero point set screen)
270008 Ref posn type
(Zero point set screen)
(3) Setting other machine parameters
The following parameters must be set in addition to those in item (2).
150004 Grspc
(Z-point rtn param screen)
160017 SPEC∗
(Servo param screen)
(4) Initializing the zero point
Refer to the explanations given in sections 4.3 to 4.5 and initialize the zero point.
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CHAPTER 3 MAINTENANCE
4. Absolute Position Detection
Operation mode
General movement
commands
G28
search engine
Absolute position detection method
Dog-type
Not possible (Note 1)
Possible
Possible
Possible
0: Incremental position detection
1: Absolute position detection (dog-type)
2: Absolute position detection (dogless-type)
0: Machine end stopper method
1: Marked point alignment method
0: The machine end or marked point is set as the
absolute position basic point.
1: The grid point is set as the absolute position
basic point.
Set the grid interval with mm unit.
Set the absolute position detection valid bit (bit 7) to
"1".
Set as a hexadecimal.
III – 13
Dogless-type
Not possible (Note 2)
Not possible (Note 2)
Possible
Not possible