
B–63083EN/02
3. INSTALLATION
17
I/O base unit
(No screws or protrusions shall
extend from the bottom of this
unit.)
Bottom
Top
(11) Operating ambient temperature of control units with PC functions
A temperature sensor in each control unit monitors the temperature to
determine whether it is within the optimum range.
(a) When the temperature is out of range when the power is turned on
The control unit does not start until the temperature settles to within
the optimum range.
(b)If the temperature drifts out of range after normal start–up
Error occurs when the hard disk is accessed.
(12)A control unit with PC functions must be carefully isolated against
vibration.
The CNC control unit or hard disk unit itself may resonate at certain
frequencies. Perform a thorough check after mounting the CNC
control unit on the machine.
CAUTION
For a control unit with PC functions, data stored on the hard
disk may be destroyed due to operator errors or accidents
even when the environmental conditions above are
satisfied. To guard against such data loss, back up the
important hard disk data regularly. In particular, never turn
off the power while the hard disk is being accessed, as doing
so is highly likely to destroy part of the contents of the disk.
End users should be made fully aware of this, to ensure that
they do not inadvertently lose important data.
(13)For a control unit with PC functions, be particularly careful when
installing the MDI unit.
(a) The MDI unit should be installed immediately below the control
unit, with no space between the units.
(b)The MDI unit should be installed vertically.