
SAFETY PRECAUTIONS B-63734EN/01
s-4
CAUTION
1 Immediately after switching on the power, do not
touch any of the keys on the MDI panel until the
position display or alarm screen appears on the CNC
unit.
Some of the keys on the MDI panel are dedicated to
maintenance or other special operations. Pressing
any of these keys may place the CNC unit in other
than its normal state. Starting the machine in this
state may cause it to behave unexpectedly.
2 The operator's manual and programming manual
supplied with a CNC unit provide an overall
description of the machine's functions, including any
optional functions. Note that the optional functions
will vary from one machine model to another.
Therefore, some functions described in the manuals
may not actually be available for a particular model.
Check the specification of the machine if in doubt.
3 Some functions may have been implemented at the
request of the machine-tool builder. When using
such functions, refer to the manual supplied by the
machine-tool builder for details of their use and any
related cautions. Refer to the following two
examples.
<1> Some machines have a tool replacement
device that operates when a tool feature is
executed. When the user is working near the
device, he or she may touch it. Execute tool
features in a place sufficiently away from the
tool replacement device.
<2> Many auxiliary features cause machine
operation such as rotation of the spindle.
Understand the operations of auxiliary features
before using them.
NOTE
1 Command programs, parameters, and variables are
stored in nonvolatile memory in the CNC unit.
Usually, they are retained even if the power is turned
off. Such data may be delated inadvertently,
however, or it may prove necessary to delete all data
from nonvolatile memory as part of error recovery.
To guard against the occurrence of the above, and
assure quick restoration of deleted data, backup all
vital data, and keep the backup copy in a safe place.
2 PROFIBUS-DP cannot be used with DeviceNet.