Mitsubishi Electric C80 series Maintenance Manual page 131

C80 Series Maintenance Manual
7 Appx.1: Types of Backup Data
Restoration by SRAM data
(1) Select [Mainte] from the screen group at the top of the CNC monitor2 screen (GOT operation panel) and then select
[Psswd input] from the menu.
(2) Enter the password for the machine parameter and then press [INPUT]. This enables the next modal output.
(3) Select [Diagn] from the screen group at the top of the CNC monitor2 screen (GOT operation panel).
(4) Select [I/F dia] from the menu.
(5) Select [Model output] from the menu and enter "Y709/1" in the input area to reset the data protection key 1.
(6) Select [Mainte] from the Screen group at the top of the CNC monitor2 screen (GOT operation panel).
(7) Press the return button on the menu to switch the menu display.
(8) Select [I/O] from the menu.
(9) Select [USB memory] for "A: Dev" and then select [Dir] from the menu.
(10) Select [From list] from the menu.
(11) Select "SRAM.BIN" displayed in the program list on the left.
(12) Press [INPUT] twice continuously.
(13) Select [Memory] for "B: Dev", select [Dir] from the menu and then enter "/DAT" in the input area.
(14) Select [Trnsfr A->B] from the menu and enter "Y" according to the displayed message.
When the message changed "Now, transferring data" to "Transfer completed", the restoration is completed.
(15) Turn the NC OFF and ON.
CAUTION
Restoration by SRAM data is available only if the rotary axis motor has not rotated in a same direction 30,000 times
or more since the acquisition of the data. Otherwise, the zero point of the rotary axis will change by turning the
power OFF and ON after writing the SRAM data, which will cause danger. Make sure the zero point is not off the
right position. The use of this method should be limited to when necessary, such as when replacing an NC unit,
and requires enough safety confirmation before executing.
Note
(1) If "Z70 Abs posn error 0101" occurs, execute SRAM clear and data restoration or initialize the zero point.
IB-1501454-C 102