Mitsubishi Electric CNC 700 Series Instruction manual

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Introduction
This manual is called MITSUBISHI CNC 700 Series CONNECTION MANUAL and covers the
items related to installation, connection and maintenance of this NC unit. Read this manual
thoroughly before using. For safe use, fully understand "Precautions for Safety" on the next
page first.
Details described in this manual:
CAUTION
For items described as "Restrictions" or "Usable State" in this manual, the instruction
manual issued by the machine tool builder takes precedence over this manual.
Items that are not described in this manual must be interpreted as "not possible".
This manual is written on the assumption that all option functions are added. Confirm the
specifications issued by the machine tool builder before use.
Refer to the Instruction Manual issued by each machine tool builder for details on each
machine tool.
Some screens and functions may differ depending on each NC system (or version), and
some functions may not be possible. Please confirm the specifications before use.
The numerical control unit is configured of the control unit, display unit, operation board, servo drive
unit, spindle drive unit, power supply unit + driver, servomotor, and spindle motor, etc.
In this manual, the following items are generically called the "controller".
•Control unit
•Display unit
•Operation board
•Numerical control unit peripheral devices (input/output unit, safety unit)
In this manual, the following items are generically called the "drive unit".
•Servo drive unit
•Spindle drive unit
•Power supply unit + driver
In this manual, the following items are generically called the "motor".
•Servomotor
•Spindle motor

Precautions for Safety
Always read this manual and enclosed documents before installation, operation, maintenance
and inspection to ensure correct usage. Thoroughly understand the basics, safety information
and precautions of the devices before using.
This manual classifies the safety precautions into "DANGER", "WARNING" and "CAUTION".
DANGER
When the user could be subject to imminent fatalities or
serious injuries if handling is mistaken.
WARNING
When the user could be subject to fatalities or serious
injuries if handling is mistaken.
CAUTION
When the user could be subject to minor or moderate
injuries or the property could be damaged if handling is
mistaken.
Note that the items under " CAUTION" could lead to serious consequences as well
depending on the situation. Please follow all items listed in "Precautions for Safety" as they
are equally important.

For Safe Use
This product is not designed or manufactured on the assumption that the product will be
used for the equipment or systems that are to be subject to any fatal consequences.
Please inquire our customer service department about any particular usage other than the
normal usage as a machine tool.
1. Items related to prevention of electric shocks
WARNING
Do not open or remove the front cover while the power is ON or during operation. The high voltage
terminals and charged sections will be exposed, and this could result in electric shocks.
Do not remove the front cover even when the power is OFF, except for the wiring works or periodic
inspections. The inside of the controller and drive unit are charged, and this could result in electric
shocks.
Always wait at least 15 minutes after turning the power OFF. Then, check the voltage with a tester,
etc., before wiring works, inspections or connecting with peripheral devices. Failure to observe this
could result in electric shocks.
Earth ground the controller, drive unit and motor according to the local laws. (In Japan, ground the
200V Series input products with Class C or higher protective grounding and the 400V Series input
with Class D or higher protective grounding.)
All wiring works, maintenance and inspections must be carried out by a qualified technician. Failure
to observe this could result in electric shocks. Contact your nearby Service Center or Service Station
for replacing parts and servicing.
Wire the controller, drive unit and motor after installation. Failure to observe this could result in
electric shocks.
Do not operate the switches with wet hands. Failure to observe this could result in electric shocks.
Do not damage, apply excessive stress, place heavy things on or sandwich the cables. Failure to
observe this could result in electric shocks.
Insulate the power lead using a fixed terminal block. Failure to observe this could result in electric
shocks.

2. Items related to prevention of fire
CAUTION
Install the controller, drive unit, motor and regenerative resistor on non-combustible material.
Installation directly on or near combustible materials could result in fires.
If any malfunction in the unit is observed, shut off the power at the unit’s power supply side.
Continuous flow of large current could result in fires.
Install an appropriate no fuse breaker (NFB) and contactor (MC) on the power input section of the
drive unit and configure the sequence that shuts the power off upon drive unit’s emergency stop or
alarm.
When a breaker is shared for multiple power supply units, the breaker may not function upon
short-circuit failure in a small capacity unit. Do not share a breaker for multiple units as this is
dangerous.
Incorrect wiring and connections could cause the devices to damage or burn.
3. Items related to prevention of bodily injury or property damage
DANGER
When transporting or installing a built-in IPM spindle or linear servomotor, be careful so that your
hand or property will not be trapped in the motors or other metal objects. Also keep the devices with
low magnetic tolerance away from the product.
CAUTION
Do not apply voltages to the connectors or terminals other than voltages indicated in the connection
manual for the controller or specifications manual for the drive unit. Failure to observe this could
cause the devices to rupture or damage, etc.
Incorrect connections could cause the devices to rupture or damage, etc.Always connect the cables
to the indicated connectors or terminals.
Incorrect polarity (+ -) could cause the devices to rupture or damage, etc.
Persons wearing medical devices, such as pacemakers, must stay away from this unit. The
electromagnetic waves could adversely affect the medical devices.
Fins on the rear of the unit, regenerative resistor and motor, etc., will be hot during operation and for
a while after the power has been turned OFF. Do not touch or place the parts and cables, etc. close
to these sections. Failure to observe this could result in burns.
Do not enter the machine’s movable range during automatic operation. Keep your hands, feet or
face away from the spindle during rotation.

4. General precautions
Always follow the precautions below. Incorrect handling could result in faults, injuries or electric shocks, etc.
(1) Transportation and installation
CAUTION
Correctly transport the products according to the mass.
Use motor’s suspension bolts to transport the motor itself. Do not use it to transport the motor after
installation onto the machine.
Do not stack the products exceeding the indicated limit.
Do not hold the cables, shaft or detector when transporting the motor.
Do not transport the controller or drive unit by suspending or holding the connected wires or cables.
Do not hold the front cover when transporting the unit, or the front cover could come off, causing the
unit to drop.
Install on a non-combustible place where the unit’s or motor’s mass can be withstood according to
the instruction manual.
The motor does not have a complete water-proof (oil-proof) structure. Do not allow oil or water to
contact or enter the motor. Prevent the cutting chips from being accumulated on the motor as they
easily soak up oil.
When installing the motor facing upwards, take measures on the machine side so that gear oil, etc.,
will not enter the motor shaft.
Do not remove the detector from the motor. (The detector installation screw is treated with sealing.)
Do not allow foreign matters, especially, conductive foreign matters such as screws or metal chips,
or combustible foreign matters such as oil, to enter the controller, drive unit or motor. Failure to
observe this could result in rupture or damage.
Do not get on the product or place heavy objects on it.
Provide prescribed distance between the controller/drive unit and inner surface of the control
panel/other devices.
Do not install or operate the controller, drive unit or motor that is damaged or has missing parts.
Take care not to cut hands, etc. with the heat radiating fins or metal edges.
Do not block the intake/outtake ports of the motor with the cooling fan.
Install the controller’s display section and operation board section on the spot where cutting oil will
not reach.

CAUTION
The controller, drive unit and motor are precision devices, so do not drop or apply thumping vibration
and strong impacts on them.
Hard disk unit is a precision device, so do not drop or apply strong impacts on it.
Store and use the units according to the environment conditions indicated in each specifications
manual.
Securely fix the motor to the machine. The motor could come off during operation if insecurely fixed.
Always install the motor with reduction gear in the designated direction. Failure to observe this could
result in oil leaks.
Always install a cover, etc., over the shaft so that the rotary section of the motor cannot be touched
during motor rotation.
When installing a coupling to the servomotor shaft end, do not apply impacts by hammering, etc. The
detector could be damaged.
Use a flexible coupling when connecting with a ball screw, etc., and keep the shaft core deviation
smaller than the tolerable radial load of the shaft.
Do not use a rigid coupling as an excessive bending load will be applied on the shaft and could
cause the shaft to break.
Do not apply a load exceeding the tolerable level onto the motor shaft. The shaft or bearing could be
damaged.
Before using this product after a long period of storage, please contact the Mitsubishi Service Station
or Service Center.
Following the UN recommendations, battery units and batteries should be transported based on the
international regulations such as those determined by International Civil Aviation Organization
(ICAO), International Air Transport Association (IATA), International Maritime Organization (IMO)
and U.S. Department of Transportation (DOT).
(2) Items related to wiring
CAUTION
Correctly wire this product. Failure to observe this could result in motor runaway, etc.
Do not install a phase advancing capacitor, surge absorber or radio noise filter on the output side of
the drive unit.
Correctly connect the output side (terminal U, V, W). The motor will not run properly if incorrectly
connected.
Always install an AC reactor per each power supply unit.

CAUTION
Always install an appropriate breaker per each power supply unit. A breaker cannot be shared for
multiple power supply units.
Do not directly connect a commercial power supply to the motor. Failure to observe this could result
in faults.
When using an inductive load such as relays, always connect a diode in parallel to the load as a
noise countermeasure.
When using a capacitive load such as a lamp, always connect a protective resistor in series to the
load to suppress rush currents.
Do not mistake the direction of the surge
absorption diode to be installed on the DC relay
for the control output signal. If mistaken, the
signal will not be output due to fault in the drive
unit, and consequently the protective circuit,
such as emergency stop, could be disabled.
R
A
RA
COM
(24VDC)
Control
output
signal
Drive unit Drive unit
COM
(24VDC)
Control
output
signal
Do not connect or disconnect the connection cables between each unit while the power is ON.
Do not connect or disconnect the PCBs while the power is ON.
Do not pull the cables when connecting/disconnecting it.
Securely tighten the cable connector fixing screw or fixing mechanism. Insufficient fixing could result
in deviation during operation.
Always treat the shield cables indicated in the Connection Manual with grounding measures such as
cable clamps.
Separate the signal wire from the drive line or power line when wiring.
Use wires and cables whose wire diameter, heat resistance level and bending capacity are
compatible with the system.
Ground the device according to the requirements of the country where the device is to be used.
Wire the heat radiating fins and wires so that they do not contact.
When using the RS-232C device as a peripheral device, caution must be paid for connector
connection/disconnection.
Always use a double-OFF type AC power supply switch on the device side, and connect/disconnect
the connector with the AC power supply on the device side OFF.
NC unit Device Switch
A
C socket
RS-232C

(3) Adjustments
CAUTION
Check and adjust programs and each parameter before starting operation. Failure to observe this
could result in unpredictable operations depending on the machine.
Do not make drastic adjustments or changes as the operation could become unstable.
(4) Usage
CAUTION
Install an external emergency stop circuit so that the operation can be stopped and the power turns
OFF immediately when unforeseen situation occurs. A contactor, etc., is required in addition to the
shutoff function mounted in the controller.
Turn OFF the power immediately if any smoke, abnormal noise or odor is generated from the
controller, drive unit or motor.
Only a qualified technician may disassemble or repair this product.
Do not alter.
Use a noise filter, etc. to reduce the effect of electromagnetic disturbances in the case where
electromagnetic disturbances could adversely affect the electronic devices used near the drive unit.
Use the drive unit, motor and each regenerative resistor with the designated combination. Failure to
observe this could result in fires or faults.
The combination of the motor and drive unit that can be used is determined. Be sure to check the
models of motor and drive unit before test operation.
The brakes (electromagnetic brakes) mounted in the servomotor are used for the purpose of
holding, and must not be used for normal braking. Also, do not run the motor with the motor brake
applied. Motor brake is used for the purpose of holding.
For the system running via a timing belt, install a brake on the machine side so that safety can be
ensured.
Be sure to confirm SERVO OFF (or READY OFF) when applying the electromagnetic brake. Also,
be sure to confirm SERVO ON prior to releasing the brake.
When using the DC OFF type electromagnetic brake, be sure to install a surge absorber on the
brake terminal.
Do not connect or disconnect the cannon plug while the electromagnetic brake’s power is ON. The
cannon plug pins could be damaged by sparks.
After changing programs/parameters, or after maintenance/inspection, always carry out a test
operation before starting actual operation.