Mitsubishi M80 series Setup guide

Introduction
This manual covers the items required for installing, connecting and setting up the MITSUBISHI CNC.
Supported models are as follows:
Read this manual thoroughly and understand the product's functions and performance before starting to use.
This manual is written on the assumption that all optional functions are added, but the actually delivered device may
not have all functions.
The unit names, cable names and various specifications are subject to change without notice. Please confirm these
before placing an order.
Be sure to keep this manual always at hand.
This manual notes a reference chapter as "Chapter: Section: Paragraph".
(Example) For "4.1.1 Environment Conditions inside the Control Panel" :
"General Specifications: Environment Conditions: Environment Conditions inside the Operation"
("4.1.1 Environment Conditions inside the Operation" included in "4.1 Environment Conditions" of "4 General
Specifications")
Notes on Reading This Manual
(1) This book is configured as follows.
Refer to the following chapters as necessary.
Installation and connection: Chapter 1 to 15
Setup: Chapter 16 to 30
(2) This manual explains general parameters as viewed from the NC.
For information about each machine tool, refer to manuals issued from the machine tool builder.
If the descriptions relating to "restrictions" and "allowable conditions" conflict between this manual and the
machine tool builder's instruction manual, the later has priority over the former.
(3) This manual is intended to contain as much descriptions as possible even about special operations.
The operations to which no reference is made in this manual should be considered "impossible".
(4) This manual is for the machine tool builders who set up the NC system.
(5) Do not connect to the pin described as "NC" on the pin assignment table of the connector.
Supported models Abbreviations in this manual
M800S Series M800 Series, M800, M8
M80 Series M80 Series, M80, M8

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 the applicable functions are included.
Some of them, however, may not be available for your NC system.
Refer to 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 starting to use.
Refer to "Smart safety observation" (BNP-C3072-022) for details about the connection with safety
observing I/O device.
Do not connect NC system to the Internet-connected network.
To maintain the safety of the NC system against unauthorized access from external devices via the
network, take appropriate measures.
The numerical control unit is configured of the control unit, display unit, operation board (operation panel I/O unit),
servo drive unit, spindle drive unit, power supply unit + driver, servomotor, spindle motor, etc.
In this manual, the following items are generically called "controller".
- Control unit
- Display unit
- Operation board (operation panel I/O unit)
- Numerical control unit peripheral devices (input/output unit, safety unit)
In this manual, the following items are generically called "drive unit".
- Servo drive unit
- Spindle drive unit
- Power supply unit + driver
In this manual, the following items are generically called "motor".
- Servo motor
- Spindle motor
Also refer to the manuals on "Manual List" as necessary.
CAUTION

Manual List
Manuals related to M800/M80/C80 Series are listed as follows.
These manuals are written on the assumption that all optional functions are added to the targeted model.
Some functions or screens may not be available depending on the machine or specifications set by MTB. (Confirm the
specifications before use.)
The manuals issued by MTB take precedence over these manuals.
Manual IB No. Purpose and Contents
M800/M80 Series
Instruction Manual IB-1501274 - Operation guide for NC - Explanation for screen operation, etc.
C80 Series
Instruction Manual IB-1501453 - Operation guide for NC
- Explanation for screen operation, etc.
M800/M80/C80 Series
Programming Manual
(Lathe System) (1/2)
IB-1501275 - G code programming for lathe system
- Basic functions, etc.
M800/M80/C80 Series
Programming Manual
(Lathe System) (2/2)
IB-1501276 - G code programming for lathe system
- Functions for multi-part system, high-accuracy function, etc.
M800/M80/C80 Series
Programming Manual
(Machining Center System) (1/2)
IB-1501277 - G code programming for machining center system
- Basic functions, etc.
M800/M80/C80 Series
Programming Manual
(Machining Center System) (2/2)
IB-1501278 - G code programming for machining center system
- Functions for multi-part system, high-accuracy function, etc.
M800/M80/C80 Series
Alarm/Parameter Manual IB-1501279 - Alarms - Parameters

Manuals for MTBs (NC)
Manuals for MTBs (drive section)
Manual IB No. Purpose and Contents
M800/M80/C80 Series
Specifications Manual (Function) IB-1501505 - Model selection
- Outline of various functions
M800/M80/C80 Series
Specifications Manual (Hardware) IB-1501506 - Model selection - Specifications of hardware unit
M800W/M80W Series
Connection and Setup Manual IB-1501268 - Detailed specifications of hardware unit - Installation, connection, wiring, setup (startup/adjustment)
M800S/M80 Series
Connection and Setup Manual IB-1501269 - Detailed specifications of hardware unit
- Installation, connection, wiring, setup (startup/adjustment)
C80 Series
Connection and Setup Manual IB-1501452 - Detailed specifications of hardware unit - Installation, connection, wiring, setup (startup/adjustment)
M800/M80 Series
PLC Development Manual IB-1501270
- Electrical design
- I/O relation (assignment, setting, connection), field network
- Development environment (PLC on-board, peripheral
development environment), etc.
M800/M80 Series
PLC Programming Manual IB-1501271
- Electrical design
- Sequence programming
- PLC support functions, etc.
M800/M80/C80 Series
PLC Interface Manual IB-1501272 - Electrical design - Interface signals between NC and PLC
M800/M80 Series
Maintenance Manual IB-1501273 - Cleaning and replacement for each unit - Other items related to maintenance
C80 Series
Maintenance Manual IB-1501454 - Cleaning and replacement for each unit
- Other items related to maintenance
Manual IB No. Contents
MDS-E/EH Series
Specifications Manual IB-1501226 - Specifications for power supply regeneration type
MDS-E/EH Series
Instruction Manual IB-1501229 - Instruction for power supply regeneration type
MDS-EJ/EJH Series
Specifications Manual IB-1501232 - Specifications for regenerative resistor type
MDS-EJ/EJH Series
Instruction Manual IB-1501235 - Instruction for regenerative resistor type
MDS-EM/EMH Series
Specifications Manual IB-1501238 - Specifications for multi-hybrid, power supply regeneration type
MDS-EM/EMH Series
Instruction Manual IB-1501241 - Instruction for multi-hybrid, power supply regeneration type
DATA BOOK IB-1501252 - Specifications of servo drive unit, spindle drive unit, motor, etc.

Manuals for MTBs (Others)
■For M800/M80 Series
■For C80 Series
Manual No. Purpose and Contents
GOT2000 Series User’s Manual
(Hardware) SH-081194 - Outline of hardware such as part names, external dimensions,
installation, wiring, maintenance, etc. of GOTs
GOT2000 Series User’s Manual
(Utility) SH-081195 - Outline of utilities such as screen display setting, operation method, etc. of GOTs
GOT2000 Series User’s Manual
(Monitor) SH-081196 - Outline of each monitor function of GOTs
GOT2000 Series Connection
Manual (Mitsubishi Electric
Products)
SH-081197 - Outline of connection types and connection method between
GOT and Mitsubishi Electric connection devices
GT Designer3 (GOT2000) Screen
Design Manual SH-081220 - Outline of screen design method using screen creation
software GT Designer3
Manual No. Purpose and Contents
GOT2000/GOT1000 Series CC-Link
Communication Unit User's Manual IB-0800351 - Explanation for handling CC-Link communication unit (for GOT2000 series/GOT1000 series)
GX Developer Version 8 Operating
Manual (Startup) SH-080372E - Explanation for system configuration, installation, etc. of PLC development tool GX Developer
GX Developer Version 8 Operating
Manual SH-080373E - Explanation for operations using PLC development tool GX
Developer
GX Converter Version 1 Operating
Manual IB-0800004E - Explanation for operations using data conversion tool GX Converter
MELSEC-Q CC-Link System Master/
Local Module User’s Manual SH-080394E - Explanation for system configuration, installation, wiring, etc. of master/local modules for CC-Link system
GOT2000 Series Connection
Manual (Non-Mitsubishi Electric
Products 1)
SH-081198ENG
- Explanation for connection types and connection method
between GOT and other company's devices
GOT2000 Series Connection
Manual (Non-Mitsubishi Electric
Products 2)
SH-081199ENG
GOT2000 Series Connection
Manual (Microcomputers, MODBUS/
Fieldbus Products, Peripherals)
SH-081200ENG
- Explanation for connection types and connection method
between GOT and microcomputers, MODBUS/fieldbus
products, peripherals
GT SoftGOT2000 Version1
Operating Manual SH-081201ENG - Explanation for system configuration, screen configuration and operation method of monitoring software GT SoftGOT2000
Manual No. Purpose and Contents
MELSEC iQ-R Module Configuration
Manual SH-081262 - Outline of system configuration, specifications, installation,
wiring, maintenance, etc.
MELSEC iQ-R CPU Module User’s
Manual (Startup) SH-081263 - Outline of specifications, procedures before operation, troubleshooting, etc. for CPU module
MELSEC iQ-R CPU Module User’s
Manual (Application) SH-081264 - Outline of memory, functions, devices, parameters, etc. for
CPU module
QCPU User’s Manual (Hardware
Design, Maintenance and
Inspection)
SH-080483
- Outline of specifications, necessary knowledge to configure
the system and maintenance-related descriptions for Q series
CPU module, etc.
GX Works3 Operating Manual SH-081215 - Outline of functions, programming, etc.

Reference Manual for MTBs
Manual No. Purpose and Contents
M800/M80 Series Smart safety
observation Specification manual BNP-C3072-022
- Explanation for smart safety observation function
C80 Series Smart safety observation
Specification manual BNP-C3077-022
M800/M80 Series CC-Link (Master/
Local) Specification manual BNP-C3072-089 - Explanation for CC-Link
M800/M80 Series Interactive cycle
insertion (Customization)
Specification manual
BNP-C3072-121-
0003 - Explanation for interactive cycle insertion
M800/M80 Series PROFIBUS-DP
Specification manual BNP-C3072-118 - Explanation for PROFIBUS-DP communication function

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".
Note that the items under " CAUTION" could lead to serious consequences as well depending on the situation.
All the items are important and must always be observed.
The following sings indicate prohibition and compulsory.
The meaning of each pictorial sing is as follows.
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 injuries or the property could be damaged if handling is mistaken.
This sign indicates prohibited behavior (must not do).
For example, indicates "Keep fire away".
This sign indicated a thing that is pompously (must do).
For example, indicates "it must be grounded".
CAUTION
CAUTION
rotated object
CAUTION HOT Danger
Electric shock risk
Danger
explosive
Prohibited Disassembly is
prohibited
KEEP FIRE AWAY General instruction
Earth ground

Mitsubishi CNC is designed and manufactured solely for applications to machine tools to be used for industrial
purposes.
Do not use this product in any applications other than those specified above, especially those which are
substantially influential on the public interest or which are expected to have significant influence on human lives or
properties.
1. Items related to prevention of electric shocks
For Safe Use
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.
Completely turn off the all lines of the power supply externally before wiring.
Not completely turning off all power could result in electric shock or damage to the product.
When turning on the power supply or operating the module after wiring, be sure that the module's terminal
covers are correctly attached.
Not attaching the terminal cover could result in electric shock.

2. Items related to prevention of fire
3. Items related to prevention of bodily injury or property damage
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.
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 and
setup manual for the controller or specifications manual for the drive unit. Failure to observe this could
cause bursting, 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) Items related to product and manual
(2) Transportation and installation
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 the applicable functions are included.
Some of them, however, may not be available for your NC system.
Refer to 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 starting to use.
Refer to "Smart safety observation" (BNP-C3072-022) for details about the connection with safety
observing I/O device.
Do not connect NC system to the Internet-connected network.
To maintain the safety of the NC system against unauthorized access from external devices via the
network, take appropriate measures.
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.

CAUTION
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.
The controller, drive unit and motor are precision devices, so do not drop or apply thumping vibration and
strong impacts on them.
The controller and drive unit are precision devices, so do not drop or apply strong impacts on them.
Store and use the units according to the environment conditions indicated in each specifications manual.
When disinfectants or insecticides must be used to treat wood packaging materials, always use methods
other than fumigation (for example, apply heat treatment at the minimum wood core temperature of 56 °C
for a minimum duration of 30 minutes (ISPM No. 15 (2009))).
If products such as units are directly fumigated or packed with fumigated wooden materials, halogen
substances (including fluorine, chlorine, bromine and iodine) contained in fumes may contribute to the
erosion of the capacitors.
When exporting the products, make sure to comply with the laws and regulations of each country.
Do not use the products in conjunction with any components that contain halogenated flame retardants
(bromine, etc). Failure to observe this may cause the erosion of the capacitors.
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).

(3) Items related to wiring
CAUTION
Correctly wire this product. Failure to observe this could result in motor runaway, etc.
Incorrect terminal connections could cause the devices to rupture or damage, 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.
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 serially 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.
Do not connect or disconnect the cables between units 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 them.
Securely tighten the cable connector fixing screw or fixing mechanism. The motor could come off during
operation if insecurely fixed.
Always treat the shield cables indicated in the Connection Manual with grounding measures such as cable
clamps.
RA RA
COM COM
Control
output
signal
Drive unit
Control
output
signal
Drive unit
(24VDC) (24VDC)

CAUTION
Separate the signal wire from the drive line or power line when wiring.
Carry out wiring so that there is no possibility of short circuit between wires, nor of dangerous state.
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.
Using a stabilized power supply without overcurrent protection may cause the unit's failure due to
miswiring of 24V.
12V, 5V, and 3.3V output from connectors are to supply the power for dedicated peripheral devices. Do not
use for other equipment to supply the power since we do not guarantee the NC operation by voltage down
or noise sneaking.
When using an inductive load such as a relay, always connect a diode in parallel to the load to prevent a
counter-electromotive force.
When the rush current exceeds the maximum output current, always connect a protective resistor serially
to the load to suppress rush currents.
The wires from the surge absorber should be connected without extensions.
RS-232C
NC unit Device Switch AC socket

(4) Set up
(5) Operation and Adjustments
WARNING
Do not cancel the emergency stop before confirming the basic operation.
Always set the stroke end and stroke limit. Failure to set this could result in collision with the machine end.
CAUTION
If the descriptions relating to the "restrictions" and "allowable conditions" conflict between this manual
and the machine tool builder's instruction manual. the latter has priority over the former.
The operations to which no reference is made in this manual should be considered "impossible".
This manual is written on the assumption that all the applicable functions are included.
Some of them, however, may not be available for your NC system.
Refer to the specifications issued by the machine tool builder before use.
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 starting to use.
If the battery low warning is issued, save the machining programs, tool data and parameters in an input/
output device, and then replace the battery. When the battery alarm is issued, the machining programs,
tool data and parameters may have been destroyed. Replace the battery and then reload the data.
Do not adjust the spindle when possible risks associated with adjustment procedures are not thoroughly
taken into consideration.
Be careful when touching spindle's rotating section, or your hand may be caught in or cut.
CAUTION
If the operation start position is set in a block which is in the middle of the program and the program is
started, the program before the set block is not executed. Please confirm that G and F modal and
coordinate values are appropriate. If there are coordinate system shift commands or M, S, T and B
commands before the block set as the start position, carry out the required commands using the MDI, etc.
If the program is run from the set block without carrying out these operations, there is a danger of
interference with the machine or of machine operation at an unexpected speed, which may result in
breakage of tools or machine tool or may cause damage to the operators.
Under the constant surface speed control (during G96 modal), if the axis targeted for the constant surface
speed control moves toward the spindle center, the spindle rotation speed will increase and may exceed
the allowable speed of the workpiece or chuck, etc. In this case, the workpiece, etc. may jump out during
machining, which may result in breakage of tools or machine tool or may cause damage to the operators.
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 in the parameters as the operation could become unstable.
In the explanation on bits, set all bits not used, including blank bits, to "0".

(6) Usage
CAUTION
Use this product within the range of environmental condition described in this manual.
Using this product in an environment outside the range could result in electric shock, fire, operation failure,
or damage to or deterioration of the product.
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.
Use the power that are complied with the power specification conditions (input voltage, input frequency,
tolerable instantaneous power failure time) indicated in each specifications manual.
When making detector cables, do not mistake connection. Failure to observe this could result in
malfunction, runaway or fire.
Surge absorber to be selected varies depending on input power voltage.

(7) Troubleshooting
(8) Maintenance, inspection and part replacement
CAUTION
Use a motor with electromagnetic brakes or
establish an external brake mechanism for
the purpose of holding; this serves as
countermeasures for possible hazardous
situation caused by power failure or
product fault.
Use a double circuit structure for the
electromagnetic brake’s operation circuit
so that the brakes will activate even when
the external emergency stop signal is
issued.
The machine could suddenly restart when the power is restored after an instantaneous power failure, so
stay away from the machine. (Design the machine so that the operator safety can be ensured even if the
machine restarts.)
To secure the absolute position, do not shut off the servo drive unit’s control power supply when its battery
voltage drops (warning 9F) in the servo drive unit side.
If the battery voltage drop warning alarm occurs in the controller side, make sure to back up the machining
programs, tool data and parameters, etc. with the input/output device before replacing the battery.
Depending on the level of voltage drop, memory loss could have happened. In that case, reload all the data
backed up before the alarm occurrence.
CAUTION
Periodically back up the programs, tool data and parameters to avoid potential data loss. Also, back up
those data before maintenance and inspections.
When replacing the battery on the controller side, the machining programs, tool data and parameters
should be backed up with the input/output device beforehand. In case the memory is damaged in replacing
the batteries, reload all the data backed up before replacing the battery.
The electrolytic capacitor’s capacity will drop due to deterioration. To prevent secondary damage due to
capacitor’s faults, Mitsubishi recommends the electrolytic capacitor to be replaced approx. every five
years even when used in a normal environment. Contact the Service Center or Service Station for
replacements.
Do not perform a megger test (insulation resistance measurement) during inspection.
Do not replace parts or devices while the power is ON.
Do not short-circuit, charge, overheat, incinerate or disassemble the battery.
There may be a unit filled with substitute Freon in the heat radiating fins of the 37kW or smaller unit. Be
careful not to break the heat radiating fins during maintenance or replacement.
MBR EMG
Motor
Electro-
magnetic
brake
Shut off with motor
brake control output
Shut off with CNC brake
control PLC output
24VDC

(9) Disposal
(10) General precautions
CAUTION
Take the batteries and backlights for LCD, etc., off from the controller, drive unit and motor, and dispose
of them as general industrial wastes.
Do not alter or disassemble controller, drive unit, or motor.
Collect and dispose of the spent batteries and the backlights for LCD according to the local laws.
To explain the details, drawings given in the instruction manual, etc., may show the unit with the cover
or safety partition removed. When operating the product, always place the cover or partitions back to
their original position, and operate as indicated in the instruction manual, etc.