Mitsubishi Electric Q Series Programming Manual page 133

4 AUXILIARY AND APPLIED FUNCTIONS
After removing or replacing the battery unit, correctly install the new unit and set the absolute
position.
After a servo amplifier battery error occurs, eliminate the cause of the error and ensure
operation is safe before setting the absolute position.
After the mechanical system is disturbed by a shock, make the necessary checks and repairs,
and ensure operation is safe before setting the absolute position.
(4) If a major error (error code: 1202, 12020) occurs because of a communication
error between the servo amplifier and encoder, home position return request
(M2409+20n) turns ON, and absolute data is erased.
However, the erasing of the absolute data can be avoided with the following
combinations.
Operating system software
Q173DSCPU/ Q173DCPU(-S1)/
Q172DSCPU Q172DCPU(-S1)
00B or later 00S or later
(Note-1): The history for the number of times a major error (error code: 1202, 12020) occurred is not
displayed in the current value history for MT Developer2 that does not support the display of the
current value history of the past 10 times. Use a version of MT Developer2 that supports the display
of the current value history of the past 10 times. (Refer to Section 1.5.)
POINT
(1) The address setting range of absolute position system is -2147483648 to
2147483647. It is not possible to restore position commands that exceed this
limit, or current values after a power interruption.
Correspond by the [degree] setting for an infinite feed operation.
(2) Even when the current value address is changed by a current value change
instruction, the restored data for the current value after a power interruption is
the value based on the status prior to execution of the current value change
instruction.
(3) When home position return has not been completed (home position return
request is ON), restoration of the current value after a power interruption is not
possible.
Servo amplifier
Model name
MR-J3- B
MR-J3- B-RJ006
MR-J3- B Safety
MR-J3- B-RJ004
MR-J3- B-RJ080W
MR-J3W- B
MR-J4- B
MR-J4- B-RJ
MR-J4W- B
Others
CAUTION
4 - 18
Operation of home position
return request (M2409+20n)
Software
when error occurs
version
C3 or later
Home position return request
C5 or later
(M2409+20n: OFF) does not
(Note-1)
turn ON.
B1 or later
—
Home position return request
(M2409+20n: ON) turns ON.
(absolute data is lost)
—: There is no restriction by the version.