Mitsubishi Electric 700 Series Instruction sheet

FR-A700
INSTALLATION GUIDELINE
FR-A770-355K, 550K-79
INVERTER
700
A
CONTENTS
Thank you for choosing this Mitsubishi Electric Inverter.
Please read through this Installation Manual and the Instruction Manual to operate this inverter correctly
Do not use this product until you have a full knowledge of the equipment, the safety information and the
instructions.
Please forward this Installation Guideline to the end user.
If you are going to utilize functions and performance, refer to the FR-A700 Instruction Manual (Applied).
1
2
3
4
5
6
INSTALLATION OF THE INVERTER AND INSTRUCTIONS ...................................1
SPECIFICATIONS......................................................................................................3
WIRING ......................................................................................................................6
PRECAUTIONS FOR THE USE OF THE INVERTER.............................................13
FAILSAFE OF THE SYSTEM WHICH USES THE INVERTER...............................15
PARAMETER...........................................................................................................16
FR-A770 DEDICATED SPECIFICATIONS..............................................................25
TROUBLESHOOTING .............................................................................................34
APPENDIX ...............................................................................................................36
7
8
Version check
Art. No.: 288858
25 08 2015
Version A
A

Print Date Art. no. Revision
08/2015 pdp-rw 288858 First edition
For Maximum Safety
앫Mitsubishi Electric transistorised inverters are not designed or manufactured to be used in equipment or systems in
situations that can affect or endanger human life.
앫When considering this product for operation in special applications such as machinery or systems used in passenger
transportation, medical, aerospace, atomic power, electric power, or submarine repeating applications, please contact
your nearest Mitsubishi Electric sales representative.
앫Although this product was manufactured under conditions of strict quality control, you are strongly advised to install
safety devices to prevent serious accidents when it is used in facilities where breakdowns of the product are likely to
cause a serious accident.
앫Please do not use this product for loads other than three-phase induction motors.
앫Please check upon receiving of the inverter whether this Installation Guideline corresponds to the delivered inverter.
Compare the specifications on the capacity plate with the specifications given in this Installation Guideline.

Electric Shock Prevention
Fire Prevention
Injury Prevention
This section is specifically about safety matters
Do not attempt to install, operate, maintain or inspect the inverter until you have read through this Installation Guideline and appended
documents carefully and can use the equipment correctly. Do not use the inverter until you have a full knowledge of the equipment,
safety information and instructions.
Installation, operation, maintenance and inspection must be performed by qualified personnel. Here, qualified personnel means
personnel who meets all the conditions below.
앫
A person who took a proper engineering training. Please note if you can take a proper engineering training at your local Mitsubishi Electric
office. Such training may be available at your local Mitsubishi Electric office. Contact your local sales office for schedules and locations.
앫 A person who can access operating manuals for the protective devices (e.g. light curtain) connected to the safety control system.
A person who has read and familiarized himself/herself with the manuals.
In this Installation Guideline, the safety instruction levels are classified into "WARNING" and "CAUTION".
Assumes that incorrect handling may cause hazardous conditions, resulting in death or severe injury.
Assumes that incorrect handling may cause hazardous conditions, resulting in medium or slight injury, or may
cause physical damage only.
Note that even the level may lead to a serious consequence according to conditions. Please follow strictly the instructions
of both levels because they are important to personnel safety.
앫While power is on or when the inverter is running, do not open the front cover or wiring cover. Otherwise you may get an electric
shock.
앫Do not run the inverter with the front cover removed. Otherwise, you may access the exposed high-voltage terminals or the charging
part of the circuitry and get an electric shock.
앫
Even if power is off, do not remove the front cover except for wiring or periodic inspection.You may access the charged inverter circuits and
get an electric shock.
앫Before starting wiring, inspection or switching EMC filter ON/OFF connector, check to make sure that the operation panel indicator is
off, wait for at least 10 minutes after the power supply has been switched off, and check that there are no residual voltage using a
tester or the like. The capacitor is charged with high voltage for some time after power off and it is dangerous.
앫This inverter must be earthed. Earthing must conform to the requirements of national and local safety regulations and electrical codes
(JIS, NEC section 250, IEC 536 class 1 and other applicable standards). A neutral-point earthed power supply for 400V class inverter
in compliance with EN standard must be used.
앫Any person who is involved in the wiring or inspection of this equipment should be fully competent to do the work.
앫Always install the inverter before wiring. Otherwise, you may get an electric shock or be injured.
앫Perform setting dial and key operations with dry hands to prevent an electric shock. Otherwise you may get an electric shock.
앫Do not subject the cables to scratches, excessive stress, heavy loads or pinching. Otherwise you may get an electric shock.
앫Do not replace the cooling fan while power is on. It is dangerous to replace the cooling fan while power is on.
앫Do no
t touch the printed circuit board with wet hands. You may get an electric shock .
앫When measuring the main circuit capacitor capacity (Pr.259 Main circuit capacitor life measuring = “1”), the DC voltage is applied to
the motor for 1s at powering off. Never touch the motor terminal, etc. right after powering off to prevent an electric shock.
앫Install the inverter on a non flammable wall without holes (so that nobody can touch the inverter heatsink on the rear side, etc.).
Mounting it to or near combustible material can cause a fire.
앫If the inverter has become faulty, switch off the inverter power. A continuous flow of large current could cause a fire.
앫When using a brake resistor, make up a sequence that will turn off power when an fault signal is output. Otherwise, the brake resistor
may excessively overheat due to damage of the brake transistor and such, causing a fire.
앫
Do not connect a resistor directly to the DC terminals P/+, N/–. This could cause a fire and destroy the inverter. The surface temperature of
braking resistors can far exceed 100 °C for brief periods. Make sure that there is adequate protection against accidental contact and a safe
distance is maintained to other units and system parts
.
앫Daily and periodic inspections must be performed as instructed in the Instruction Manual. If the product is used without receiving any
inspection, it may cause a burst, break, or fire.
앫Apply only the voltage specified in the instruction manual to each terminal. Otherwise, burst, damage, etc. may occur.
앫Ensure that the cables are connected to the correct terminals. Otherwise, burst, damage, etc. may occur.
앫Always make sure that polarity is correct to prevent damage, etc. Otherwise, burst, damage, etc. may occur.
앫While power is on or for some time after power-off, do not touch the inverter as it is hot and you may get burnt.
WARNING
CAUTION
CAUTION
WARNING
CAUTION
CAUTION

Additional Instructions
Also note the following points to prevent an accidental failure, injury, electric shock, etc.
Transportation and Installation
Wiring
Test operation and adjustment
Operation
앫Transport the product using the correct method that corresponds to the weight. Failure to observe this could lead to injuries.
앫Do not stack the inverter boxes higher than the number recommended.
앫 Ensure that installation position and material can withstand the weight of the inverter. Install according to the information in the instruction
manual.
앫Do not install or operate the inverter if it is damaged or has parts missing. This can result in breakdowns.
앫When carrying the inverter, do not hold it by the front cover or setting dial; it may fall off or fail.
앫Do not stand or rest heavy objects on the product.
앫Check the inverter mounting orientation is correct.
앫Prevent other conductive bodies such as screws and metal fragments or other flammable substance such as oil from entering the
inverter.
앫As the inverter is a precision instrument, do not drop or subject it to impact.
앫Use the inverter under the following environmental conditions. Otherwise, the inverter may be damaged.
햲Temperature applicable for a short time, e.g. in transit.
앫If halogen-based materials (fluorine, chlorine, bromine, iodine, etc.) infiltrate into a Mitsubishi Electric product, the product will be
damaged. Halogen-based materials are often included in fumigant, which is used to sterilize or disinfect wooden packages. When
packaging, prevent residual fumigant components from being infiltrated into Mitsubishi Electric products, or use an alternative
sterilization or disinfection method (heat disinfection, etc.) for packaging. Sterilization of disinfection of wooden package should also
be performed before packaging the product.
앫To prevent a failure, do not use the inverter with a part or material containing halogen flame retardant including bromine.
앫Do not install assemblies or components (e. g. power factor correction capacitors) on the inverter output side, which are not approved
from Mitsubishi Electric. These devices on the inverter output side may be overheated or burn out.
앫The direction of rotation of the motor corresponds to the direction of rotation commands (STF/STR) only if the phase sequence (U, V,
W) is maintained.
앫Before starting operation, confirm and adjust the parameters. A failure to do so may cause some machines to make unexpected
motions.
앫When you have chosen the retry function, stay away from the equipment as it will restart suddenly after an alarm stop.
앫The key is valid only when the appropriate function setting has been made. Prepare an emergency stop switch separately to
make an emergency stop (power off, mechanical brake operation for emergency stop, etc).
앫Make sure that the start signal is off before resetting the inverter alarm.A failure to do so may restart the motor suddenly.
앫The load used should be a three-phase induction motor only. Connection of any other electrical equipment to the inverter output may
damage the inverter as well as the equipment.
앫Performing pre-excitation (LX signal and X13 signal) under torque control (real sensorless vector control) may start the motor running
at a low speed even when the start command (STF or STR) is not input. The motor may run also at a low speed when the speed limit
value = 0 with a start command input. Perform pre-excitation after making sure that there will be no problem in safety if the motor runs.
앫Do not modify the equipment.
앫Do not perform parts removal which is not instructed in this manual. Doing so may lead to fault or damage of the inverter.
앫The electronic thermal relay function does not guarantee protection of the motor from overheating. It is recommended to install both an
external thermal and PTC thermistor for overheat protection.
앫Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the inverter. Otherwise, the life of the inverter
decreases.
앫Use a noise filter to reduce the effect of electromagnetic interference and follow the accepted EMC procedures for proper installation
of frequency inverters. Otherwise nearby electronic equipment may be affected.
앫Take appropriate measures regarding harmonics. Otherwise this can endanger compensation systems or overload generators.
앫When parameter clear or all clear is performed, set again the required parameters before starting operations. Each parameter returns
to the initial value.
앫The inverter can be easily set for high-speed operation. Before changing its setting, fully examine the performances of the motor and
machine.
앫The DC braking function of the frequency inverter is not designed to continuously hold a load. Use an electro-mechanical holding
brake on the motor for this purpose.
앫Before running an inverter which had been stored for a long period, always perform inspection and test operation.
앫For prevention of damage due to static electricity, touch nearby metal before touching this product to eliminate static electricity from
your body.
CAUTION
Environment
Surrounding
air
temperature
Pr.570 = “2”
(Initial value) 10°C to +50°C (non-freezing)
Pr.570 = “102” 10°C to +40°C (non-freezing)
Ambient humidity 90% RH or less (non-condensing)
Storage temperature 20°C to +65°C 햲
Atmosphere Indoors (free from corrosive gas, flammable gas, oil mist, dust and dirt)
Altitude Maximum 1000m above sea level for standard operation. After that derate by 3% for every extra
500m up to 2500m (91%).
Vibration 2.9m/s² or less at 10 to 55Hz (directions of X, Y, Z axes)
CAUTION
CAUTION
WARNING
CAUTION

Emergency stop
Maintenance, inspection and parts replacement
Disposing of the inverter
앫Provide a safety backup such as an emergency brake which will prevent the machine and equipment from hazardous conditions if the
inverter fails.
앫When the breaker on the inverter primary side trips, check for the wiring fault (short circuit), damage to internal parts of the inverter,
etc. Identify the cause of the trip, then remove the cause and power on the breaker.
앫When the protective function is activated (i. e. the frequency inverter switches off with an error message), take the corresponding
corrective action as described in the inverter manual, then reset the inverter, and resume operation.
앫Do not carry out a megger (insulation resistance) test on the control circuit of the inverter.
앫Treat as industrial waste.
General instructions
Many of the diagrams and drawings in instruction manuals show the inverter without a cover, or partially open. Never run the inverter in
this status. Always replace the cover and follow instruction manuals when operating the inverter.
CAUTION
CAUTION
CAUTION

1
1 INSTALLATION OF THE INVERTER AND INSTRUCTIONS
Unpack the inverter and check the capacity plate on the front cover and the rating plate on the inverter side face to
ensure that the product agrees with your order and the inverter is intact.
1.2 Installation of the inverter
1.3 Compatible plug-in options
The options compatible with the FR-A770-79 are as shown below.
Enclosure surface mounting
Model Function
FR-A7AX 16-bit digital input function
FR-A7AY Analog output function, Digital output function
FR-A7AR Relay output function
FR-A7AP Encoder feedback control, Vector control
FR-A7AL Orientation control, Encoder feedback control, Vector control, Position control, Encoder pulse division output
FR-A7AZ Bipolar analog output function, High-resolution analog input function, Motor thermistor interface
FR-A7NC CC-Link communication function
FR-A7NCE CC-Link IE Field Network communication function
FR-A7ND DeviceNet communication function
FR-A7NP Profibus-DP communication function
Rating plate
- 79
FR-A770-355K-79
355K
FR--A770
FR-A770-355K-79
1.1 Inverter Model
Symbol Voltage Class
A770 Three-phase
690V class
Symbol Type number
355K,
560K Displays the inverter
capacity [kW]
Capacity plate
Capacity plate
Rating plate
Serial number
Inverter model
Inverter model
Input rating
Output rating
Serial number
Production year and month
CAUTION
앫When encasing multiple inverters, install them in parallel as a cooling measure.
앫Install the inverter vertically.
vertical
20cm or more
20cm or more
20cm or more

2
INSTALLATION OF THE INVERTER AND INSTRUCTIONS
1.4 General Precaution
The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than
10 minutes, and check for residual voltage between terminal P/+ and N/with a meter etc., to avoid a hazard of electrical
shock.
1.5 Environment
Before installation, check that the environment meets following specifications.
1.6 Peripheral devices
Check the inverter model of the inverter you purchased. Appropriate peripheral devices must be selected according to the
capacity. Refer to the following list and prepare appropriate peripheral devices:
*1 Motor Output (kW) in the above table indicates values when using the 4-pole standard motor with power supply voltage of 690VAC 60Hz.
*2 Select the MCCB according to the power supply capacity. Install one MCCB per inverter.
*3 Magnetic contactor is selected based on the AC-3 class. The electrical durability of magnetic contactor is 500,000 times. When the magnetic
contactor is used for emergency stop during motor driving, the electrical durability is 25 times.
Surrounding air
temperature
Pr.570 = “2” (Initial value):
–10°C to +50°C (non-freezing)
Enclosure
Pr.570 = “102”:
–10°C to +40°C (non-freezing)
Ambient humidity 90% RH or less (non-condensing)
Storage temperature 20°C to +65°C
Atmosphere Indoors (No corrosive and flammable gases, oil mist, dust and dirt)
Altitude Maximum 1000m above sea level for standard operation.After that derate by 3% for every extra 500m up
to 2500m (91%).
Vibration 2.9m/s² or less at 10 to 55Hz (directions of X, Y, Z axes)
CAUTION
앫Install the inverter on a strong surface securely and vertically with bolts.
앫Leave enough clearances and take cooling measures.
앫Avoid places where the inverter is subjected to direct sunlight, high temperature and high humidity.
앫Install the inverter on a non-combustible surface.
Motor Output [kW] *1 Applicable Inverter Model Moulded Case Circuit Breaker
(MCCB) *2 or Earth Leakage Circuit
Breaker (ELB) (NF or NV type)
Input Side Magnetic
Contactor *3
355 FR-A770-355K-79 500A 401A
560 FR-A770-560K-79 800A 611A
CAUTION
앫When the inverter capacity is larger than the motor capacity, select an MCCB and a magnetic contactor according to the inverter model
and cable and reactor according to the motor output.
앫When the breaker on the inverter primary side trips, check for the wiring fault (short circuit), damage to internal parts of the inverter,
etc. Identify the cause of the trip, then remove the cause and power on the breaker.
5 cm5 cm
5 cm
Inverter
x = Measurement position
MCCB
MCCB
Inverter
Inverter
M
3~
M
3~

3
2 SPECIFICATIONS
2.1 Inverter rating
*1 The % value of the overload current rating indicated is the ratio of the overload current to the inverter's rated output current. For repeated duty,
allow time for the inverter and motor to return to or below the temperatures under 100% load.
*2 The maximum output voltage dose not exceed the power supply voltage. The maximum output voltage can be changed within the setting
range. However, the pulse voltage value of the inverter output side voltage remains unchanged at about that of the power supply.
*3 The power supply capacity varies with the value of the power supply side inverter impedance (including those of the input reactor and cables).
*4 The applicable motor capacity indicated assumes that the output voltage is 660 to 690V.
*5 When connecting the control circuit separately from the main circuit power supply.
*6 Set Pr.570 = “102” for Vector control or Real sensorless vector control.
Model FR-A770-씲K-79 355 560
Applicable motor Capacity [kW] *4 Pr.570 = “2”
(Initial value) 355 560
Pr.570 = “102” *6 315 500
Output
Rated current [A] Pr.570 = “2”
(Initial value) 401 611
Pr.570 = “102” *6 344 545
Overload current rating *1 150% 60s (inverse-time characteristics)
Rated voltage *2 Three-phase 600 to 690V
Output frequency range 0.2 to 400Hz
PWM carrier frequency 2kHz
Power supply
Rated input AC voltage/frequency Three-phase 600 to 690V 50/60Hz
Permissible AC voltage fluctuation ±10%
Permissible frequency fluctuation ±5%
Power supply capacity [kVA] *3 463 730
Power supply voltage for control circuit *5 AC 380 to 480V 50/60Hz
Protective structure (JEM 1030) Open type (IP00)
Cooling system Forced air cooling
Approx.mass [kg] 380
Surrounding air temperature Pr.570 = “2”
(Initial value) –10°C to +50°C (non-freezing)
Pr.570 = “102” *6 –10°C to +40°C (non-freezing)

4
SPECIFICATIONS
2.2 OUTLINE DIMENSION DRAWING
2.2.1 FR-A770-355K, 560K-79
(Unit: mm)
300300300 995
1580
440
1550
222 194
185
15
15
R/L1 T/L3 P1 UW
S/L2 N/– P/+ V
4-Ø12 holes
4.5 4.5

5
SPECIFICATIONS
2.2.2 FR-HEL-N355K
2.2.3 FR-HEL-N560K
(Unit: mm)
(Unit: mm)
PP
P1 P1
2-Ø20 holes2-terminal (for M12 bolt)
Rating plate Earth (ground) terminal
(for M8 screw)
4-mounting hole
(for M10 screw)
324 ±5 384 ±5
360 max
215 ±1.5
240 ±2.5
4.5
P1 P1
PP
2-terminal (for M16 bolt) Rating plate
Earth (ground) terminal
(for M12 screw)
4-mounting hole
(for M10 screw)
405 ±10 445 ±10
390 max
150 ±1
230 max
4.5
450 ±10
2-M12 eye nut *1
(2-Ø30 hole)
215 ±2
*1 Remove the eye nut after installation of the product.

6
3 WIRING
3.1 Terminal connection diagram
R1/L11
S1/L21
PC
10E(+10V)
10(+5V)
2
2
3
1
1
4
C1
B1
A1
C2
B2
A2
AU
PTC
TXD+
TXD-
RXD+
RXD-
SG GND
SINK
SOURCE
*4
*3
STF
STR
STOP
RH
RM
RL
JOG
RT
MRS
RES
AU
CS
SD
RUN
SU
IPF
OL
FU
SE
(+)
(-)
5
VCC
(+)
(-)
5V
N/–
ON 42
OFF
AM
5(-)
(+)
(-)
(+)
CA
24V
R/L1
S/L2
T/L3
MC
MCCB U
V
W
P1 P/+
T
*5
*5
Source logic
Main circuit terminal
Control circuit terminal
Jumper*2
*1 DC reactor (FR-HEL)
Be sure to connect the DC reactor
supplied.
Motor
*2To supply power to the
control circuit separately,
remove the jumper across
R1/L11 and S1/L21.
3-phase AC
power supply
Main circuit
Control circuit
Terminal functions vary with
the input terminal
assignment.
(Pr. 178 to Pr. 189)
(Refer to the Instruction
Manual (Applied))
Control input signals (No voltage input allowed)
Forward
rotation
start
Reverse
rotation
start
Start self-
holding
selection
High speed
Middle speed
Low speed
Multi-speed selection
Jog mode
Second function selection
Output stop
Reset
Current input selection
Selection of automatic restart after
instantaneous power failure
Contact input common (Sink*)
*3 JOG terminal can be used
as pulse train input
terminal. Use Pr. 291 to
select JOG/pulse.
24 V DC power supply/max. 100 mA load current
Contact input common (Source*)
*(Common for external power supply transistor)
Frequency setting signal (Analog)
Auxiliary
input
Terminal 4
input
(Current
input)
0–5V DC
0– ±10V DC
4–20mA DC
0 to 10V DC
0 to 20mA DC
0 to ±5V DC
0 to 5V DC
0 to 10V DC
PU
connector
Connector for
plug-in option
connection Option connector 1
Terminating
resistor
*5 Terminal input specifica-
tions can be changed by
analog input specifications
switchover (Pr. 73, Pr. 267).
Set the voltage/current
input switch in the OFF
position to select voltage
input (0 to 5V/0 to10V) and
ON to select current input
(4 to 20mA). (Refer to the
Instruction Manual (Applied))
*6 It is recommended to use 1kΩ, 2W
potentiometer when the frequency
setting signal is changed frequently.
Relay output 1
(Alarm output)
Relay output 2
Running
Instantaneous
power failure
Up to frequency
Overload
Terminal functions
vary with the output
terminal assignment
(Pr. 195, Pr. 196)
(Refer to the
Instruction Manual
(Applied))
Terminal functions
vary with the output
terminal assignment
(Pr. 190 to Pr. 194)
(Refer to the
Instruction Manual
(Applied))
Frequency detection
Open collector output common
Sink/source common
Analog current output
(0 to 20mADC)
Analog signal output
(0 to 10VDC)
RS-485 terminals
Data transmission
Data reception
(Permissible load
current 100mA)
Frequency setting
potentiometer
1k:, 1/2W
M
3~
*4 AU terminal can be
used as PTC input
terminal.
*5 Voltage/
current
input switch
Option connector 2
Option connector 3
Relay output
Open collector output
Earth
(Ground)
*1
Earth
(Ground)
Inrush
current
limit
circuit
selectable
selectable
selectable
initial value
initial value
initial value

7
WIRING
3.2 Main circuit terminal
3.2.1 Main circuit terminal specifications
3.2.2 Terminal layout and wiring
CAUTION
앫To prevent a malfunction due to noise, keep the signal cables more than 10cm away from the power cables. Also separate the main
circuit wire of the input side and the output side.
앫After wiring, wire offcuts must not be left in the inverter. Wire offcuts can cause an alarm, failure or malfunction.Always keep the
inverter clean. When drilling mounting holes in an enclosure etc., take care not to allow chips and other foreign matter to enter the
inverter.
앫Set the voltage/current input switch correctly. Different setting may cause a fault, failure or malfunction.
Terminal
Symbol Terminal Name Description
R/L1,
S/L2,
T/L3 AC power input Connect to the commercial power supply.
U, V, W Inverter output Connect a three-phase squirrel-cage motor.
R1/L11,
S1/L21 Power supply for control circuit Connected to theAC power supply terminals R/L1 and S/L2. To retain the fault display and fault
output, remove the jumpers across terminals R/L1 and R1/L11 and across S/L2 and S1/L21,
and apply external power supply of 380 to 480VAC to these terminals.
P/+, P1 DC reactor
connection Connect the DC reactor.
P/+, N/– — Non-connection
Earth (Ground) For earthing (grounding) the inverter chassis. Must be earthed (grounded).
FR-A770-355K, 560K-79
CAUTION
앫The power supply cables must be connected to R/L1, S/L2, T/L3. (Phase sequence needs not to be matched.)
Never connect the power cable to the U, V, W of the inverter. Doing so will damage the inverter.
앫Connect the motor to U, V, W. At this time turning on the forward rotation switch (signal) rotates the motor in
the clockwise direction when viewed on the motor shaft. (The phase sequence must be matched.)
앫When wiring the inverter main circuit conductor, tighten a nut from the right side of the conductor. When wiring
two wires, place wires on both sides of the conductor. (Refer to the drawing on the right.) For wiring, use bolts
(nuts) provided with the inverter.
R/L1 S/L2 T/L3 N/-
R1/L11 S1/L21
P/+
P/+
M
3~
Charge lamp
Jumper
DC reactor
Power supply Motor

8
WIRING
3.2.3 Applied cable size
Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor torque
to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m.
690V class
The line voltage drop can be calculated by the following expression:
Use a larger diameter cable when the wiring distance is long or when it is desired to decrease the voltage drop (torque
reduction) in the low speed range.
3.2.4 Maximum permissible motor wiring length
The overall wiring length for connection of a single motor or multiple motors should be within 500m.
(The wiring length should be 100m maximum for vector control.)
When driving a 690V class motor by the inverter, surge voltages attributable to the wiring constants may occur at
the motor terminals, deteriorating the insulation of the motor.
Take the following measure in this case.
Use a “690V class inverter-driven insulation-enhanced motor”
3.2.5 Cable size of the control circuit power supply (terminal R1/L11, S1/L21)
앫Terminal screw size: M4
앫Cable size: 0.75mm² to 2mm²
앫Tightening torque: 1.5Nm
Applicable Inverter
Type
Terminal
Screw Size
*2
Tightening
Torque
[Nm]
Crimping Terminal Cable Size (mm²) *1
R/L1,
S/L2,
T/L3 U, V, W P/+, P1 Earth
(Ground)
Cable
R/L1,
S/L2,
T/L3 U, V, W P/+, P1 Earth
(Ground)
Cable
FR-A770-355K-79 M12(M10) 46 200-12 200-12 325-12 150-10 200 200 250 150
FR-A770-560K-79 M12(M10) 46 150-12 150-12 200-12 200-10 2x150 2x150 2x200 200
*1The recommended cable size is that of the cable (LMFC (heat resistant flexible cross-linked polyethylene insulated cable) etc.) with continuous
maximum permissible temperature of 90°C. Assumes that the surrounding air temperature is 50°Cor less and wiring is performed in an
enclosure.
*2The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, U, V, W, PR, PX, P/+, N/–, P1, and a screw for earthing (grounding).
Line voltage drop [V] =¹3 × wire resistance [m:/m] × wiring distance [m] x current [A]
1000
CAUTION
앫Tighten the terminal screw to the specified torque.
A screw that has been tighten too loosely can cause a short circuit or malfunction.
A screw that has been tighten too tightly can cause a short circuit or malfunction due to the unit breakage.
앫Use crimping terminals with insulation sleeve to wire the power supply and motor.

9
WIRING
3.3 Control circuit terminals
3.3.1 Control circuit specifications
Input signals
indicates that terminal functions can be selected using Pr. 178 to Pr. 196 (I/O terminal function selection).
Type
Terminal
Symbol Terminal Name Description Rated Specifications
Contact input
STF Forward rotation
start Turn ON the STF signal to start forward rotation and turn it OFF to stop. When the STF and STR
signals are turned ON
simultaneously, the stop
command is given. Input resistance 4.7k:
Voltage at opening:
21 to 27VDC
Contacts at
shortcircuited:
4 to 6mADC
STR Reverse rotation
start Turn ON the STR signal to start reverse rotation and turn it OFF to stop.
STP
(STOP) Start self-holding selection Turn ON the STOP signal to self-hold the start signal.
RH, RM,
RL Multi-speed selection Multi-speed can be selected according to the combination of RH, RM and RL signals.
JOG
Jog mode
selection Turn ON the JOG signal to select Jog operation (initial setting) and turn ON the start signal (STF or STR) to start Jog operation.
Pulse train input JOG terminal can be used as pulse train input terminal. To use as pulse train input terminal, the Pr. 291 setting needs to be changed.
(maximum input pulse: 100kpulses/s)
Input resistance 2k:
Contacts at
shortcircuited:
8 to 13mADC
RT Second function
selection Turn ON the RT signal to select second function. When the second
function such as “second torque boost” and “second V/F (base
frequency)” are set, turning ON the RT signal selects these functions.
Input resistance 4.7k:
Voltage at opening:
21 to 27VDC
Contacts at
shortcircuited:
4 to 6mADC
MRS Output stop Turn ON the MRS signal (20ms or more) to stop the inverter output. Use to shut off the inverter output when stopping the motor by
electromagnetic brake.
RES Reset
Use to reset fault output provided when fault occurs.
Turn ON the RES signal for more than 0.1s, then turn it OFF.
In the initial status, reset is set always-enabled. By setting Pr. 75,
reset can be set enabled only at fault occurrence. Recover about 1s
after reset is cancelled.
AU
Terminal 4 input
selection Terminal 4 is valid only when the AU signal is turned ON. (The
frequency setting signal can be set between 4 and 20mADC.)
Turning the AU signal ON makes terminal 2 (voltage input) invalid.
PTC input AU terminal is used as PTC input terminal (thermal protection of the motor). When using it as PTC input terminal, set the AU/PTC switch
to PTC.
CS Selection of
automatic restart
afterinstantaneous
power failure
When the CS signal is left ON, the inverter restarts automatically at
power restoration. Note that restart setting is necessary for this
operation. In the initial setting, a restart is disabled.
SD
Contact input
common (sink)
(initial setting) Common terminal for contact input terminal (sink logic).
—
External transistor
common (source)
Connect this terminal to the power supply common terminal of a
transistor output (open collector output) device, such as a
programmable controller, in the source logic to avoid malfunction by
undesirable currents.
24VDC power
supply common Common output terminal for 24VDC 0.1A power supply (PC
terminal).
Isolated from terminals 5 and SE.
PC
External transistor
common (sink)
(initial setting)
Connect this terminal to the power supply common terminal of a
transistor output (open collector output) device, such as a
programmable controller, in the sink logic to avoid malfunction by
undesirable currents. Power supply voltage
range 19.2 to 28.8VDC
Permissible load current
100mA
Contact input
common (source) Common terminal for contact input terminal (source logic).
24VDC power
supply Can be used as 24VDC 0.1A power supply.

10
WIRING
* Set Pr. 73, Pr. 267, and a voltage/current input switch correctly, then input an analog signal in accordance with the setting.
Applying a voltage signal with voltage/current input switch ON (current input is selected) or a current signal with switch OFF (voltage input is
selected) could cause component damage of the inverter or analog circuit of signal output devices.
Output signals
Frequency setting
10E Frequency setting
power supply
When connecting the frequency setting potentiometer at an initial
status, connect it to terminal 10.
Change the input specifications of terminal 2 when connecting it to
terminal 10E.
10VDC±0.4V
Permissible load current
10mA
10 5.2VDC±0.2V Permissible load current
10mA
2Frequency setting
(voltage)
Inputting 0 to 5VDC (or 0 to 10V, 0 to 20mA) provides the maximum
output frequency at 5V (10V, 20mA) and makes input and output
proportional. Use Pr. 73 to switch from among input 0 to 5VDC (initial
setting), 0 to 10VDC, and 0 to 20mA.
Set the voltage/current input switch in the ON position to select
current input (0 to 20mA). *
Voltage input:
Input resistance
10k:±1k:
Maximum permissible
voltage
20VDC
Current input:
Input resistance
245:±5:
Maximum permissible
current 30mA
4Frequency setting
(current)
Inputting 4 to 20mADC (or 0 to 5V, 0 to 10V) provides the maximum
output frequency at 20mA makes input and output proportional. This
input signal is valid only when theAU signal is ON (terminal 2 input is
invalid). Use Pr. 267 to switch from among input 4 to 20mA (initial
setting), 0 to 5VDC, and 0 to 10VDC. Set the voltage/current input
switch in the OFF position to select voltage input (0 to 5V/0 to 10V).*
Use Pr. 858 to switch terminal functions.
1Frequency setting
auxiliary Inputting 0 to ±5 VDC or 0 to ±10VDC adds this signal to terminal 2 or
4 frequency setting signal. Use Pr. 73 to switch between the input 0
to ±5VDC and 0 to ±10VDC (initial setting).
Input resistance
10k:±1k:
Maximum permissible
voltage ±20VDC
5Frequency setting
common Common terminal for frequency setting signal (terminal 2, 1 or 4) and analog output terminal AM and CA. Do not earth (ground). —
Type
Terminal
Symbol Terminal Name Description Rated Specifications
Relay
A1, B1,
C1 Relay output 1 (Alarm output)
1 changeover contact output indicates that the inverter protective
function has activated and the output stopped.
Fault: No conduction across B-C (Across A-C Continuity),
Normal: Across B-C Continuity (No conduction across A-C)
Contact capacity:
230VAC 0.3A
(Power factor = 0.4)
30VDC 0.3A
A2, B2,
C2 Relay output 2 1 changeover contact output
Open collector
RUN Inverter running Switched low when the inverter output frequency is equal to or higher than the starting frequency (initial value 0.5Hz). Switched high during
stop or DC injection brake operation.* Permissible load 24VDC
(27VDC maximum) 0.1A
(A voltage drop is 2.8V
maximum when the
signal is ON.)
Low is when the open
collector output
transistor is ON
(conducts).
High is when the
transistor is OFF (does
not conduct)
SU Up to frequency Switched low when the output frequency reaches
within the range of ±10% (initial value) of the set
frequency. Switched high during acceleration/
deceleration and at a stop.
Fault code
(4 bits)
output
OL Overload warning Switched low when stall prevention is activated by the stall prevention function. Switched high when stall
prevention is cancelled.
IPF Instantaneous
power failure Switched low when an instantaneous power failure and under voltage protections are activated.
FU Frequency
detection
Switched low when the inverter output frequency is
equal to or higher than the preset detected frequency
and high when less than the preset detected
frequency
SE Open collector
output common Common terminal for terminals RUN, SU, OL, IPF, FU —
Analog
CA Analog current
output Select one e.g. output frequency from monitor items.
Not output during inverter reset.
The output signal is proportional to the magnitude of
the corresponding monitoring item.
Use Pr. 55, Pr. 56, and Pr. 866 to set full scales for the
monitored output frequency, output current, and
torque.
Output
item:
Output
frequency
(initial
setting)
Load impedance
200:to 450:
Output signal
0 to 20mADC
AM Analog voltage
output
Output signal
0 to 10VDC
Permissible load current
1mA (load impedance
10k:or more)
Resolution 8 bits
Type
Terminal
Symbol Terminal Name Description Rated Specifications

11
WIRING
Communication
Type
Terminal
Symbol Terminal Name Description
RS-485
— PU connector
With the PU connector, communication can be made through RS-485.
(for connection on a 1:1 basis only)
앫Conforming standard: EIA-485 (RS-485)
앫Transmission format: Multidrop
앫Communication speed: 4800 to 38400bps
앫Overall length: 500m
RS-485 terminals
TXD+ Inverter transmission
terminal With the RS-485 terminals, communication can be made through RS-485.
앫Conforming standard: EIA-485 (RS-485)
앫Transmission format: Multidrop link
앫Communication speed: 300 to 38400bps
앫Overall length: 500m
TXD–
RXD+ Inverter reception
terminal
RXD–
SG Earth (Ground)
USB
— USB connector Non-connection

12
WIRING
3.3.2 Wiring of control circuit
Terminal layout
Instructions for wiring of the control circuit terminal
앫Terminals 5, SD and SE are common to the I/O signals and isolated from each other. Do not earth (ground).
Avoid connecting the terminal SD and 5 and the terminal SE and 5.
앫It is recommended to use the cables of 0.75mm² gauge for connection to the control circuit terminals.
If the cable gauge used is 1.25mm² or more, the front cover may be lifted when there are many cables running or the
cables are run improperly, resulting in an operation panel contact fault.
앫The wiring length should be 30m maximum.
앫Use two or more parallel micro-signal contacts or twin
contacts to prevent a contact faults when using contact
inputs since the control circuit input signals are micro-
currents.
앫To suppress EMI, use shielded or twisted cables for the
control circuit terminals and run them away from the main
and power circuits (including the 200V relay sequence circuit). For the cables connected to the control circuit terminals,
connect their shields to the common terminal of the connected control circuit terminal. When connecting external power
supply to the terminal PC, however, connect the shield of the power supply cable to the negative side of the external
power supply. Do not directly earth (ground) the shield to the enclosure, etc.
앫Do not apply a voltage to the contact input terminals (e.g. STF) of the control circuit.
앫Always apply a voltage to the alarm output terminals (A, B, C) via a relay coil, lamp, etc.
A1 B1 C1 A2
STOP
AURTRHRMRL
OLIPFSU
RUN
B2 C2 10E 10
SD
RES MRS
STF SDSD CPUFCS JOG STR
254
1
AMCA
SE
Control circuit terminal *
Terminal screw size: M3.5
Tightening torque: 1.2N·m
* Referto instruction manuals ofoptions
for the available control terminals
other than the standard control circuit
terminal.
Micro signal contacts Twin contacts

13
4 PRECAUTIONS FOR USE OF THE INVERTER
The FR-A700 series is a highly reliable product, but incorrect peripheral circuit making or operation/handling method may
shorten the product life or damage the product.
Before starting operation, always recheck the following items.
앫Use crimping terminals with insulation sleeve to wire the power supply and motor.
앫Application of power to the output terminals (U, V, W) of the inverter will damage the inverter. Never perform such wiring.
앫After wiring, wire offcuts must not be left in the inverter.
Wire offcuts can cause an alarm, failure or malfunction.Always keep the inverter clean. When drilling mounting holes in
a control box etc., take care not to allow chips and other foreign matter to enter the inverter.
앫Use cables of the size to make a voltage drop 2% maximum.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
Refer to page 8 for the recommended cable size.
앫The overall wiring length should be 500m maximum.
Especially for long distance wiring, the fast-response current limit function may be reduced or the equipment connected
to the inverter output side may malfunction or become faulty under the influence of a charging current due to the stray
capacity of the wiring. Therefore, note the overall wiring length. (Refer to page 8)
앫Electromagnetic Compatibility
Operation of the frequency inverter can cause electromagnetic interference in the input and output that can be
propagated by cable (via the power input lines), by wireless radiation to nearby equipment (e.g. AM radios) or via data
and signal lines. Install an optional filter if present to reduce air propagated interference on the input side of the inverter.
Use AC or DC reactors to reduce line propagated noise (harmonics). Use shielded motor power lines to reduce output
noise.
앫Do not install a power factor correction capacitor, varistor or arrester on the inverter output side.
This will cause the inverter to trip or the capacitor, varistor, or arrester to be damaged. If any of the above devices is
installed, immediately remove it.
앫For some short time after the power is switched OFF, a high voltage remains in the smoothing capacitor.
When accessing the inverter for inspection, wait for at least 10 minutes after the power supply has been switched OFF,
and then make sure that the voltage across the main circuit terminals P/+ and N/- of the inverter is no more than 30VDC
using a tester.
앫A short circuit or earth (ground) fault on the inverter output side may damage the inverter modules.
– Fully check the insulation resistance of the circuit prior to inverter operation since repeated short circuits caused by
peripheral circuit inadequacy or an earth (ground) fault caused by wiring inadequacy or reduced motor insulation
resistance may damage the inverter modules.
– Fully check the to-earth insulation and inter-phase insulation of the inverter output side before power-on.
Especially for an old motor or use in hostile atmosphere, securely check the motor insulation resistance etc.
앫Do not use the inverter input side magnetic contactor to start/stop the inverter.
Since repeated inrush currents at power ON will shorten the life of the converter circuit (switching life is about 1,000,000
times), frequent starts and stops of the MC must be avoided. Always use the start signal (ON/OFF of STF and STR
signals) to start/stop the inverter.
앫Do not apply a voltage higher than the permissible voltage to the inverter I/O signal circuits.
Application of a voltage higher than the permissible voltage to the inverter I/O signal circuits or opposite polarity may
damage the I/O devices. Especially check the wiring to prevent the speed setting potentiometer from being connected
incorrectly to short terminals 10E or 5.
앫Provide electrical and mechanical interlocks for MC1 and
MC2 which are used for bypass operation.
When the wiring is incorrect or if there is a bypass circuit as
shown below, the inverter will be damaged by leakage
current from the power supply when it is connected to the
inverter U, V, and W terminals due to arcs generated at the
time of switch-over or chattering caused by a sequence
error.
앫If the machine must not be restarted when power is restored after a power failure, provide a magnetic contactor in the
inverter's input side and also make up a sequence which will not switch on the start signal.
If the start signal (start switch) remains on after a power failure, the inverter will automatically restart as soon as the
power is restored.
Inverter Undesirable current
Interlock
Power supply M
3~
MC1
MC2

14
PRECAUTIONS FOR USE OF THE INVERTER
앫A motor with encoder is necessary for vector control. In addition, connect the encoder directly to the backlash-free motor
shaft. (An encoder is not necessary for real sensorless vector control.)
앫Inverter input side magnetic contactor (MC)
On the inverter input side, connect a MC for the following purposes. (Refer to Chapter 1 of the Instruction Manual
(Applied).)
1)To release the inverter from the power supply when a fault occurs or when the drive is not functioning (e.g. emergency
stop operation). For example, MC avoids overheat or burnout of the brake resistor when heat capacity of the resistor
is insufficient or brake regenerative transistor is damaged with short while connecting an optional brake resistor.
2)To prevent any accident due to an automatic restart at restoration of power after an inverter stop made by a power
failure.
3)To separate the inverter from the power supply to ensure safe maintenance and inspection work.
If using an MC for emergency stop during operation, select an MC regarding the inverter input side current as JEM1038-
AC-3 class rated current.
앫Handling of inverter output side magnetic contactor
Switch the magnetic contactor between the inverter and motor only when both the inverter and motor are at a stop.
When the magnetic contactor is turned ON while the inverter is operating, overcurrent protection of the inverter and
such will activate. When MC is provided for switching to the commercial power supply, for example, switch it ON/OFF
after the inverter and motor have stopped.
앫Countermeasures against inverter-generated EMI
If electromagnetic noise generated from the inverter causes frequency setting signal to fluctuate and motor rotation
speed to be unstable when changing motor speed with analog signal, the following countermeasures are effective.
- Do not run the signal cables and power cables (inverter I/O cables) in parallel with each other and do not bundle them.
- Run signal cables as far away as possible from power cables (inverter I/O cables).
- Use shield cables as signal cables.
- Install a ferrite core on the signal cable (Example: ZCAT3035-1330 TDK).
앫Instructions for overload operation
When performing operation of frequent start/stop of the inverter, increase/decrease in the temperature of the transistor
element of the inverter may repeat due to a continuous flow of large current, shortening the life from thermal fatigue.
Since thermal fatigue is related to the amount of current, the life can be increased by reducing bound current, starting
current, etc. Decreasing current may increase the life. However, decreasing current will result in insufficient torque and
the inverter may not start. Therefore, increase the inverter capacity to have enough allowance for current (up to 2 rank
larger in capacity).
앫Make sure that the specifications and rating match the system requirements.

15
5 FAILSAFE OF THE SYSTEM WHICH USES THE
INVERTER
When a fault occurs, the inverter trips to output a fault signal. However, a fault output signal may not be output at an
inverter fault occurrence when the detection circuit or output circuit fails, etc. Although Mitsubishi Electric assures best
quality products, provide an interlock which uses inverter status output signals to prevent accidents such as damage to
machine when the inverter fails for some reason and at the same time consider the system configuration where failsafe
from outside the inverter, without using the inverter, is enabled even if the inverter fails.
Interlock method which uses the inverter status output signals
By combining the inverter status output signals to provide an interlock as shown below, an inverter alarm can be detected.
Backup method outside the inverter
Even if the interlock is provided by the inverter status signal, enough failsafe is not ensured depending on the failure status
of the inverter itself. For example, when the inverter CPU fails, even if the interlock is provided using the inverter fault
signal, start signal and RUN signal, there is a case where a fault signal is not output and RUN signal is kept output even if
an inverter fault occurs.
Provide a speed detector to detect the motor speed and current detector to detect the motor current and consider the
backup system such as checking up as below according to the level of importance of the system.
1)Start signal and actual operation check
Check the motor running and motor current while the start signal is input to the inverter by comparing the start signal
to the inverter and detected speed of the speed detector or detected current of the current detector. Note that the
motor current runs as the motor is running for the period until the motor stops since the inverter starts decelerating
even if the start signal turns off. For the logic check, configure a sequence considering the inverter deceleration time.
In addition, it is recommended to check the three-phase current when using the current detector.
2)Command speed and actual operation check
Check if there is no gap between the actual speed and commanded speed by comparing the inverter speed
command and detected speed of the speed detector.
No. Interlock Method Check Method Used Signals Refer to Page
1) Inverter protective function
operation Operation check of an alarm contact Circuit error detection by negative logic Fault output signal (ALM signal)
Refer to Chapter 4 of
the Instruction Manual
(Applied).
2)
Inverter running status
Operation ready signal check Operation ready signal
(RY signal)
3) Logic check of the start signal and
running signal Start signal
(STF signal, STR signal)
Running signal (RUN signal)
4) Logic check of the start signal and output
current
Start signal
(STF signal, STR signal)
Output current detection signal
(Y12 signal)
System failure
Controller
Inverter Sensor
(speed, temperature,
air volume, etc.)
To the alarm detection sensor