Mitsubishi A1SD75M3 User Manual page 541

12 CONTROL AUXILIARY FUNCTIONS
[4] Absolute position restoration mode switching method
(b) When " Md.121 Absolute position restoration mode" is not switched
" Md.120 FeRAM access count" increases by "2".
(11) If the " Md.120 FeRAM access count" exceeds 9.9999
updating of the absolute position of the zero point, a warning "automatic
update count over" (warning code: 11) occurs.
(12) If write to the FeRAM is not completed normally at automatic updating of the
absolute position of the zero point, a warning "automatic update failure"
(warning code: 12) occurs.
The method of switching the absolute position restoration mode is described below.
(1) Set the following parameter.
Setting item
Absolute position
Pr.59
restoration
selection
* Refer to section "5.2 List of parameters" for the setting details.
POINT
When the "infinite length mode" is selected as the absolute position restoration
selection, set the parameters to satisfy the following (a) to (c).
(a) Set " Pr.1 Unit setting" to "2: degree".
(b) Set the software stroke limit function invalid.
Pr.101
(c) Set " Amplifier setting" to "1: Absolute position detection valid".
(2) Turn ON the PLC READY signal (Y1D).
(3) Using the servo ON/OFF function (refer to section 12.4.5), turn ON the all axes
servo ON signal (Y15).
(4) Execute a machine zero point return.
(5) After completion of the machine zero point return, the absolute position
restoration mode is established. The established mode is stored into the
following monitor data.
Setting item
Absolute position
Md.121
restoration mode
* Refer to section "5.6 List of monitor data" for the storage details.
Setting
Setting details
value
Select the mode for absolute
position restoration in an absolute
position detection system.
0: Standard mode
1: Infinite length mode
Monitor
Storage details
value
The mode for absolute position
restoration selected in Pr.59 is
stored.
0: Standard mode
1: Infinite length mode
12 - 69
MELSEC-A
9
10 times at automatic
Buffer memory address
Axis 1 Axis 2 Axis 3
91 241 391
Buffer memory address
Axis 1 Axis 2 Axis 3
879 979 1079