When replacing the printed circuit board and modules in the control unit,
follow the description below.
Before replacing the printed circuit board and modules listed below, be
sure to back up the SRAM area where parameters, part programs (NC
programs), and so forth are stored.
Part name Drawing number Remarks
Main printed circuit board A16B–3200–0362
PMC control module
Memory and spindle module
FROM and SRAM module
Servo module A20B–2902–0290 (*1)
1 These modules do not have an SRAM area. However,
when any of these modules is replaced, the data in the
SRAM area may be destructed by mistake. Be sure to back
up the data in the SRAM area before replacing any of these
2 If the absolute position of a motor is held using a separate
absolute pulse coder or linear scale, detaching the cables
connected to JF21 through JF25 from the main printed
circuit board when replacing the main printed circuit board
or a module mounted on the printed circuit board disables
the absolute position of the motor from being held. After the
main printed circuit board or a module mounted on the
printed circuit board is replaced, a reference position return
request is indicated. Perform reference position return
Removing the printed circuit board
Hold the upper and lower hooks in the upward and downward directions.
When the hooks are released, pull the printed circuit board toward you.
Mounting the printed circuit board
Each slot of the case of the control unit has a guide. Align the printed
circuit board with the guide, then insert the printed circuit board. Insert
the printed circuit board until it is hooked by the upper and lower hooks.
Replacing the Printed