YASKAWA varispeed G7 CIMR-G7B series User manual

YASKAWA
Varispeed G7
INSTRUCTION MANUAL
MANUAL NO. TOEP C710616 13B
GENERAL PURPOSE INVERTER (ADVANCED VECTOR CONTROL)
MODEL:CIMR-G7B
Upon receipt of the product and prior to initial operation, read these instructions
thoroughly, and retain for future reference.
200V CLASS 0.4 to 110kW (1.2 to 160kVA)
400V CLASS 0.4 to 300kW (1.4 to 460kVA)
YASKAWA

Copyright ©2007 YASKAWA ELECTRIC CORPORATION
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system,
or transmitted, in any form, or by any means, mechanical, electronic, photocopying, recording,
or otherwise, without the prior written permission of Yaskawa. No patent liability is assumed
with respect to the use of the information contained herein. Moreover, because Yaskawa is con-
stantly striving to improve its high-quality products, the information contained in this manual is
subject to change without notice. Every precaution has been taken in the preparation of this
manual. Nevertheless, Yaskawa assumes no responsibility for errors or omissions. Neither is
any liability assumed for damages resulting from the use of the information contained in this
publication.

i
Preface
This manual is designed to ensure correct and suitable
application of Varispeed G7-Series Inverters. Read
this manual before attempting to install, operate, main-
tain, or inspect an Inverter and keep it in a safe, conve-
nient location for future reference. Be sure you
understand all precautions and safety information
before attempting application.
General Precautions
• The diagrams in this manual may be indicated without covers or safety shields to show details.
Be sure to restore covers or shields before operating the Units and run the Units according to the
instructions described in this manual.
• Any illustrations, photographs, or examples used in this manual are provided as examples only
and may not apply to all products to which this manual is applicable.
• The products and specifications described in this manual or the content and presentation of the
manual may be changed without notice to improve the product and/or the manual.
• When ordering a new copy of the manual due to damage or loss, contact your Yaskawa represen-
tatives or the nearest Yaskawa sales office and provide the manual number shown on the front
cover.
• If nameplates become warn or damaged, order new ones from your Yaskawa representatives or
the nearest Yaskawa sales office.

ii
Safety Information
The following conventions are used to indicate precautions in this manual. Failure to heed pre-
cautions provided in this manual can result in serious or possibly even fatal injury or damage to
the products or to related equipment and systems.
Failure to heed a precaution classified as a caution can result in serious consequences depending
on the situation.
Indicates precautions that, if not heeded, could possibly result in loss of life or serious injury.
Indicates precautions that, if not heeded, could result in relatively serious or minor injury, damage
to the product, or faulty operation.
IMPORTANT
Indicates important information that should be memorized.
WARNING
CAUTION

iii
Safety Precautions
Confirmations upon Delivery
Installation
Wiring
CAUTION
• Never install an Inverter that is damaged or missing components.
Doing so can result in injury.
CAUTION
• Always hold the case when carrying the Inverter.
If the Inverter is held by the front cover, the main body of the Inverter may fall, possibly resulting in injury.
• Attach the Inverter to a metal or other noncombustible material.
Fire can result if the Inverter is attached to a combustible material.
• Install a cooling fan or other cooling device when installing more than one Inverter in the same
enclosure so that the temperature of the air entering the Inverters is below 45°C.
Overheating can result in fires or other accidents.
WARNING
• Always turn OFF the input power supply before wiring terminals.
Otherwise, an electric shock or fire can occur.
• Wiring must be performed by an authorized person qualified in electrical work.
Otherwise, an electric shock or fire can occur.
• Be sure to ground the ground terminal. (200 V Class: Ground to 100 Ωor less, 400 V Class:
Ground to 10 Ωor less)
Otherwise, an electric shock or fire can occur.
• Always check the operation of any emergency stop circuits after they are wired.
Otherwise, there is the possibility of injury. (Wiring is the responsibility of the user.)
• Never touch the output terminals directly with your hands or allow the output lines to come into con-
tact with the Inverter case. Never short the output circuits.
Otherwise, an electric shock or ground short can occur.
• If the power supply is turned ON during the FWD (or REV) Run Command is given, the motor will
start automatically.
Turn the power supply ON after verifying that the RUN signal is OFF.
Failure to observe this warning may result in injury.
• When the 3-wire sequence is set, do not make the wiring for the control circuit unless the multi-
function input terminal constant is set.
Failure to observe this warning may result in injury.
CAUTION
• Check to be sure that the voltage of the main AC power supply satisfies the rated voltage of the
Inverter.
Injury or fire can occur if the voltage is not correct.
• Do not perform voltage withstand tests on the Inverter.
Otherwise, semiconductor elements and other devices can be damaged.
• Connect braking resistors, Braking Resistor Units, and Braking Units as shown in the I/O wiring
examples.
Otherwise, a fire can occur and the Inverter, braking resistors, Braking Resistor Units, and Braking Units can be damaged.

iv
Setting User Constants
Trial Operation
• Tighten all terminal screws to the specified tightening torque.
Otherwise, a fire may occur.
• Do not connect AC power to output terminals U, V, and W.
The interior parts of the Inverter will be damaged if voltage is applied to the output terminals.
• Do not connect phase-advancing capacitors or LC/RC noise filters to the output circuits.
The Inverter can be damaged or interior parts burnt if these devices are connected.
• Do not connect magnetic contactors to the output circuits.
If a load is connected while the Inverter is operating, surge current will cause the overcurrent protection circuit inside the
Inverter to operate.
CAUTION
• Disconnect the load (machine, device) from the motor before performing rotational autotuning.
The motor may turn, possibly resulting in injury or damage to equipment. Also, motor constants cannot be correctly set
with the motor attached to a load.
• Stay clear of the motor during rotational autotuning.
The motor repeats running and stopping until autotuning has been completed, possibly resulting in injury.
• In stationary autotuning 1, when the motor is first operated in the drive mode after tuning, the
remaining motor constants E2-02 (Motor rated slip) and E2-03 (Motor no-load current) are set auto-
matically. To perform an operation immediately after stationary autotuning 1, use the following pro-
cedure under the recommended conditions.
(1) Check the values of E2-02 and E2-03 in verify mode or advanced programming mode.
(2) Run the motor once in drive mode under the following conditions.
• The Inverter and the motor are connected.
• The motor shaft is not locked with a mechanical brake or other stopping mechanism (or function).
• A motor-load ratio of 30% or less is maintained.
• A speed of 30% or more of the base frequency set at E1-06 (default = highest frequency) is maintained at
a constant speed for one second or more.
(3) After stopping the motor, check the values of E2-02 and E2-03 again in verify mode or advanced program-
ming mode. If the values of E2-02 and E2-03 differ from the ones before the first operation was carried out,
the settings have been successfully completed. Next, check if the values are suitable or not.
If the values of E2-02 and E2-03 differed greatly from the reference data of the motor in the test report or the instruction
manual (TOE-S616-60.1), hunting, motor vibrations, insufficient motor torque, or an overcurrent may occur because the
motor is operated although the aforementioned conditions have not been fulfilled after stationary autotuning 1. For eleva-
tors, failure to observe this caution may result in the cage falling or injury. If so, perform stationary autotuning 1 again and
run the motor using the aforementioned procedure under the recommended conditions or perform stationary autotuning 2
or rotational autotuning.
Usually the standard setting for E2-02 is 1 Hz to 3 Hz, and that for E2-03 is 30%to 65%of the rated current for a general-
purpose motor. Generally, the larger the motor capacity is, the smaller the rated slip and the ratio of the no-load current to
the rated current become. Use the data given in Factory Settings that Change with the Inverter Capacity (o2-04) of Chap-
ter 5 User Constants as a reference.
WARNING
• Check to be sure that the front cover is attached before turning ON the power supply.
An electric shock may occur.
• Do not come close to the machine when the fault reset function is used. If the alarmed is cleared,
the machine may start moving suddenly.
Also, design the machine so that human safety is ensured even when it is restarted.
Injury may occur.
• Provide a separate emergency stop switch; the Digital Operator STOP Key is valid only when its
function is set.
Injury may occur.
CAUTION

v
Maintenance and Inspection
• Reset alarms only after confirming that the RUN signal is OFF.
Injury may occur.
CAUTION
• Don't touch the radiation fins (heatsink), braking resistor, or Braking Resistor Unit. These can
become very hot.
Otherwise, a burn injury may occur.
• Be sure that the motor and machine is within the applicable ranges before starting operation.
Otherwise, an injury may occur.
• Provide a separate holding brake if necessary.
Always construct the external sequence to confirm that the holding brake is activated in the event
of an emergency, a power failure, or an abnormality in the Inverter.
Failure to observe this caution can result in injury.
• If using an Inverter with an elevator, take safety measures on the elevator to prevent the elevator
from dropping.
Failure to observe this caution can result in injury.
• Don't check signals while the Inverter is running.
Otherwise, the equipment may be damaged.
• Be careful when changing Inverter settings. The Inverter is factory set to suitable settings. For the
Inverters in the 400 V class of 55 kW or more, however, select the correct power supply voltage
jumper according to the input voltage.
Otherwise, the equipment may be damaged.
WARNING
• Do not touch the Inverter terminals. Some of the terminals carry high voltages and are extremely
dangerous.
Doing so can result in electric shock.
• Always have the protective cover in place when power is being supplied to the Inverter. When
attaching the cover, always turn OFF power to the Inverter through the MCCB.
Doing so can result in electric shock.
• After turning OFF the main circuit power supply, wait until the CHARGE indicator light goes out
before performing maintenance or inspections.
The capacitor will remain charged and is dangerous.
• Maintenance, inspection, and replacement of parts must be performed only by authorized person-
nel.
Remove all metal objects, such as watches and rings, before starting work. Always use grounded tools.
Failure to heed these warning can result in electric shock.
• Provide a separate holding brake if necessary.
Always make any adjustments other than those involving the operation of the Inverter with the holding brake released.
Failure to observe this caution may result in injury.
• If using an Inverter with an elevator, take safety measures on the elevator to prevent the elevator
from dropping.
Failure to observe this caution can result in injury.
WARNING

vi
Other
CAUTION
• A CMOS IC is used in the control board. Handle the control board and CMOS IC carefully.
The CMOS IC can be destroyed by static electricity if touched directly.
• Do not change the wiring, or remove connectors or the Digital Operator, during operation.
Doing so can result in personal injury.
WARNING
• Do not attempt to modify or alter the Inverter.
Doing so can result in electrical shock or injury.
CAUTION
• Do not subject the Inverter to halogen gases, such as fluorine, chlorine, bromine, and iodine, at any
time even during transportation or installation.
Otherwise, the Inverter can be damaged or interior parts burnt.

vii
Warning Information and Position
There is warning information on the Inverter in the position shown in the following illustration.
Always heed the warnings.
Warning Information
Illustration shows the CIMR-G7B20P4
Warning
information
position
Illustration shows the CIMR-G7B2018
Warning
information
position
!WARNING
Risk of electric shock.
yRead manual before installing.
yWait 5 minutes for capacitor discharge
after disconnecting power supply.
!AVERTISSEMENT
y
y
!

viii
Warranty Information
Free Warranty Period and Scope
Warranty Period
This product is warranted for twelve months after being delivered to Yaskawa’s customer or if
applicable eighteen months from the date of shipment from Yaskawa’s factory whichever comes
first.
Scope of Warranty
Inspections
Periodic inspections must be conducted by the customer. However, upon request, Yaskawa or
one of Yaskawa’s Service Centers can inspect the product for a fee. In this case, if after confer-
ring with the customer, a Yaskawa product is found to be defective due to Yaskawa workman-
ship or materials and the defect occurs during the warranty period, then this fee will be waived
and the problem remedied free of charge.
Repairs
If a Yaskawa product is found to be defective due to Yaskawa workmanship or materials and the
defect occurs during the warranty period, Yaskawa will provide a replacement, repair the defec-
tive product, and provide shipping to and from the site free of charge.
However, if the Yaskawa Authorized Service Center determines that the problem with a
Yaskawa product is not due to defects in Yaskawa’s workmanship or materials, then the cus-
tomer will be responsible for the cost of any necessary repairs. Some problems that are outside
the scope of this warranty are:
•Problems due to improper maintenance or handling, carelessness, or other reasons where the
customer is determined to be responsible.
•Problems due to additions or modifications made to a Yaskawa product without Yaskawa’s
understanding.
•Problems due to the use of a Yaskawa product under conditions that do not meet the recom-
mended specifications.
•Problems caused by natural disaster or fire.
•Or other problems not due to defects in Yaskawa workmanship or materials.
Warranty service is only applicable within Japan.
However, after-sales service is available for customers outside of Japan for a reasonable fee.
Contact your local Yaskawa representative for more information.
Exceptions
Any inconvenience to the customer or damage to non-Yaskawa products due to Yaskawa's
defective products whether within or outside the warranty period are NOT covered by this war-
ranty.
Restrictions
•The Varispeed G7 was not designed or manufactured for use in devices or systems that may
directly affect or threaten human lives or health.
•Customers who intend to use the product described in this manual for devices or systems
relating to transportation, health care, space aviation, atomic or electric power, or underwater
use must contact their Yaskawa representatives or the nearest Yaskawa sales office before-
hand.
•This product has been manufactured under strict quality-control guidelines. However, if this
product is to be installed in any location where failure of this product could involve or result
in a life-and-death situation or loss of human life or in a facility where failure may cause a
serious accident or physical injury, safety devices must be installed to minimize the likelihood
of any accident.

ix
Registered Trademarks
The following registered trademarks are used in this manual.
•DeviceNet is a registered trademark of the ODVA (Open DeviceNet Vendors Association,
Inc.).
•InterBus is a registered trademark of Phoenix Contact Co.
•ControlNet is a registered trademark of ControlNet International, Ltd.
•LONWORKS is a registered trademark of the Echelon.

x
Contents
Safety Information ............................................................................................ii
Safety Precautions ..........................................................................................iii
Warning Information and Position ..................................................................vii
Warranty Information..................................................................................... viii
Registered Trademarks...................................................................................ix
1 Handling Inverters ...................................................................1-1
Varispeed G7 Introduction............................................................................ 1-2
Varispeed G7 Models ..................................................................................................... 1-2
Confirmations upon Delivery ........................................................................ 1-3
Checks ........................................................................................................................... 1-3
Nameplate Information ................................................................................................... 1-3
Component Names ........................................................................................................ 1-5
Exterior and Mounting Dimensions .............................................................. 1-6
Open Chassis Inverters (IP00) ....................................................................................... 1-6
Enclosed Wall-mounted Inverters [NEMA1 (Type 1)] ..................................................... 1-7
Checking and Controlling the Installation Site.............................................. 1-9
Installation Site ...............................................................................................................1-9
Controlling the Ambient Temperature............................................................................. 1-9
Protecting the Inverter from Foreign Matter ................................................................... 1-9
Installation Orientation and Space.............................................................. 1-10
Removing and Attaching the Terminal Cover ............................................. 1-11
Removing the Terminal Cover ...................................................................................... 1-11
Attaching the Terminal Cover ....................................................................................... 1-12
Removing/Attaching the Digital Operator and Front Cover ........................ 1-13
Inverters of 15 kW or Less ........................................................................................... 1-13
Inverters of 18.5 kW or More........................................................................................ 1-16
Removing and Attaching the Protection Cover .......................................... 1-17
Removing the Protection Cover ................................................................................... 1-17
Attaching the Protection Cover..................................................................................... 1-18
2 Wiring .......................................................................................2-1
Connections to Peripheral Devices .............................................................. 2-2
Connection Diagram .................................................................................... 2-3
Terminal Block Configuration ....................................................................... 2-5
Wiring Main Circuit Terminals....................................................................... 2-6

xi
Applicable Wire Sizes and Closed-loop Connectors ...................................................... 2-6
Main Circuit Terminal Functions ...................................................................................2-13
Main Circuit Configurations...........................................................................................2-14
Standard Connection Diagrams.................................................................................... 2-15
Wiring the Main Circuits................................................................................................2-16
Wiring Control Circuit Terminals .................................................................2-22
Wire Sizes and Closed-loop Connectors ......................................................................2-22
Control Circuit Terminal Functions ...............................................................................2-24
Control Circuit Terminal Connections ...........................................................................2-28
Control Circuit Wiring Precautions................................................................................2-29
Wiring Check ..............................................................................................2-30
Checks..........................................................................................................................2-30
Installing and Wiring Option Boards ...........................................................2-31
Option Board Models and Specifications ......................................................................2-31
Installation.....................................................................................................................2-32
PG Speed Control Board Terminals and Specifications................................................2-33
Wiring............................................................................................................................2-35
Wiring Terminal Blocks.................................................................................................2-38
Selecting the Number of PG (Encoder) Pulses ............................................................2-39
3 Digital Operator and Modes................................................... 3-1
Digital Operator ............................................................................................3-2
Digital Operator Display..................................................................................................3-2
Digital Operator Keys......................................................................................................3-2
Modes...........................................................................................................3-5
Inverter Modes................................................................................................................3-5
Switching Modes............................................................................................................. 3-6
Drive Mode .....................................................................................................................3-7
Quick Programming Mode .............................................................................................. 3-8
Advanced Programming Mode .....................................................................................3-10
Verify Mode................................................................................................................... 3-13
Autotuning Mode...........................................................................................................3-14
4 Trial Operation ........................................................................ 4-1
Overview of Trial Operation Procedure ........................................................4-2
Trial Operation Procedures...........................................................................4-3
Setting the Power Supply Voltage Jumper
(400 V Class Inverters of 55 kW or Higher) ....................................................................4-3
Power ON .......................................................................................................................4-3
Checking the Display Status...........................................................................................4-4
Basic Settings .................................................................................................................4-5
Settings for the Control Methods ....................................................................................4-7
Autotuning.......................................................................................................................4-9
Application Settings ...................................................................................................... 4-16
No-load Operation ........................................................................................................4-16

xii
Loaded Operation......................................................................................................... 4-16
Check and Recording User Constants ......................................................................... 4-17
Adjustment Suggestions ............................................................................ 4-18
5 User Constants ........................................................................5-1
User Constant Descriptions.......................................................................... 5-2
Description of User Constant Tables .............................................................................. 5-2
Digital Operation Display Functions and Levels...........................................5-3
User Constants Settable in Quick Programming Mode.................................................. 5-4
User Constant Tables ................................................................................... 5-8
A: Setup Settings............................................................................................................ 5-8
b: Application Constants............................................................................................... 5-10
C: Autotuning Constants .............................................................................................. 5-21
d: Reference Constants................................................................................................ 5-27
E: Motor Constant Constants ....................................................................................... 5-33
F: Option Constants ..................................................................................................... 5-38
H: Terminal Function Constants................................................................................... 5-45
L: Protection Function Constants ................................................................................. 5-57
N: Special Adjustments ................................................................................................ 5-68
o: Digital Operator Constants ....................................................................................... 5-72
T: Motor Autotuning...................................................................................................... 5-76
U: Monitor Constants.................................................................................................... 5-77
Factory Settings that Change with the Control Method (A1-02)................................... 5-86
Factory Settings that Change with the Inverter Capacity (o2-04)................................. 5-89
6 Constant Settings by Function...............................................6-1
Frequency Reference................................................................................... 6-2
Selecting the Frequency Reference Source................................................................... 6-2
Using Multi-Step Speed Operation................................................................................. 6-5
Varispeed G7 Function Block......................................................................................... 6-8
Run Command ........................................................................................... 6-10
Selecting the Run Command Source ........................................................................... 6-10
Stopping Methods ...................................................................................... 6-12
Selecting the Stopping Method when a Stop Command is Sent .................................. 6-12
Using the DC Injection Brake ....................................................................................... 6-16
Using an Emergency Stop............................................................................................ 6-17
Acceleration and Deceleration Characteristics .......................................... 6-18
Setting Acceleration and Deceleration Times............................................................... 6-18
Accelerating and Decelerating Heavy Loads (Dwell Function) .................................... 6-22
Preventing the Motor from Stalling During Acceleration (Stall Prevention During
Acceleration Function).................................................................................................. 6-23
Preventing Overvoltage During Deceleration (Stall Prevention During Deceleration
Function) ...................................................................................................................... 6-25
Preventing Overvoltage by Automatically Reducing the Regenerative Torque Limit
(Overvoltage Inhibit Function) ...................................................................................... 6-26

xiii
Adjusting Frequency References ...............................................................6-28
Adjusting Analog Frequency References .....................................................................6-28
Operation Avoiding Resonance (Jump Frequency Function) .......................................6-31
Adjusting Frequency Reference Using Pulse Train Inputs ...........................................6-33
Speed Limit (Frequency Reference Limit Function) ...................................6-34
Limiting Maximum Output Frequency ........................................................................... 6-34
Limiting Minimum Frequency........................................................................................6-34
Improved Operating Efficiency ...................................................................6-36
Reducing Motor Speed Fluctuation (Slip Compensation Function) ..............................6-36
Compensating for Insufficient Torque at Startup and Low-speed Operation
(Torque Compensation) ................................................................................................6-38
Hunting-prevention Function.........................................................................................6-40
Stabilizing Speed (Speed Feedback Detection Function) ............................................6-41
Machine Protection.....................................................................................6-42
Reducing Noise and Leakage Current..........................................................................6-42
Limiting Motor Torque (Torque Limit Function).............................................................6-46
Preventing Motor Stalling During Operation .................................................................6-49
Changing Stall Prevention Level during Operation Using an Analog Input ..................6-50
Using Frequency Detection: L4-01 to L4-05 .................................................................6-50
Detecting Motor Torque ................................................................................................6-53
Changing Overtorque and Undertorque Detection Levels Using an Analog Input ....... 6-56
Motor Overload Protection............................................................................................6-57
Setting Motor Protection Operation Time......................................................................6-59
Motor Overheating Protection Using PTC Thermistor Inputs........................................6-60
Limiting Motor Rotation Direction.................................................................................. 6-62
Continuing Operation..................................................................................6-63
Restarting Automatically After Power Is Restored........................................................ 6-63
Speed Search ............................................................................................................... 6-64
Continuing Operation at Constant Speed When Frequency Reference Is Lost............ 6-71
Restarting Operation After Transient Fault (Auto Restart Function).............................6-72
Operation Selection After Cooling Fan Fault ................................................................6-73
Inverter Protection ......................................................................................6-74
Performing Overheating Protection on Mounted Braking Resistors .............................6-74
Reducing Inverter Overheating Pre-Alarm Warning Levels..........................................6-75
Input Terminal Functions ............................................................................6-76
Temporarily Switching Operation between Digital Operator and Control Circuit
Terminals ......................................................................................................................6-76
Blocking Inverter Outputs (Baseblock Commands) ...................................................... 6-77
Stopping Acceleration and Deceleration (Acceleration/Deceleration Ramp Hold) .......6-78
Raising and Lowering Frequency References Using Contact Signals (UP/DOWN).....6-79
Accelerating and Decelerating Constant Frequencies in the Analog References
(+/- Speed)....................................................................................................................6-82
Hold Analog Frequency Using User-set Timing............................................................ 6-83
Switching Operations between a Communications Option Board and Control
Circuit Terminals ...........................................................................................................6-83

xiv
Jog Frequency Operation without Forward and Reverse Commands
(FJOG/RJOG) .............................................................................................................. 6-84
Stopping the Inverter by Notifying Programming Device Errors to the Inverter
(External Fault Function) .............................................................................................. 6-85
Output Terminal Functions ......................................................................... 6-86
Monitor Constants ...................................................................................... 6-88
Using the Analog Monitor Constants ............................................................................ 6-88
Using Pulse Train Monitor Contents............................................................................. 6-90
Individual Functions ................................................................................... 6-92
Using MEMOBUS Communications............................................................................. 6-92
Using the Timer Function ........................................................................................... 6-105
Using PID Control....................................................................................................... 6-106
Energy-saving ............................................................................................................ 6-115
Setting Motor Constants............................................................................................. 6-117
Setting the V/f Pattern ................................................................................................ 6-120
Torque Control ........................................................................................................... 6-127
Speed Control (ASR) Structure .................................................................................. 6-136
Increasing the Speed Reference Response (Feed Forward Control) ........................ 6-142
Droop Control Function .............................................................................................. 6-143
Zero-servo Function ................................................................................................... 6-145
Digital Operator Functions........................................................................ 6-148
Setting Digital Operator Functions ............................................................................. 6-148
Copying Constants ..................................................................................................... 6-151
Prohibiting Writing Constants from the Digital Operator............................................. 6-156
Setting a Password .................................................................................................... 6-156
Displaying User-set Constants Only........................................................................... 6-157
Options..................................................................................................... 6-158
Performing Speed Control with PG ............................................................................ 6-158
Using Digital Output Boards ....................................................................................... 6-162
Using an Analog Reference Board ............................................................................. 6-164
Using a Digital Reference Board ................................................................................ 6-165
Using Inverters for Elevating Machines.................................................... 6-170
Brake ON/OFF Sequence .......................................................................................... 6-170
Stall Prevention during Deceleration .......................................................................... 6-172
Autotuning .................................................................................................................. 6-172
Braking Resistor Overheating Protection ................................................................... 6-172
Momentary Power Loss Restart ................................................................................. 6-172
Torque Limit................................................................................................................ 6-172
I/O Open-phase Protection and Overtorque Detection .............................................. 6-173
External Baseblock Signal.......................................................................................... 6-173
Acceleration/Deceleration Time.................................................................................. 6-173
Magnetic Contactor on the Inverter’s Output-side...................................................... 6-173
Control-related Adjustments....................................................................................... 6-174
Reducing Shock during Elevating Machine Start, Stop, Acceleration, and
Deceleration ............................................................................................................... 6-176

xv
Confirming Startup Current and Reducing Carrier Frequency ....................................6-179
Overvoltage Inhibit Function ....................................................................................... 6-180
Current Alarm Function ............................................................................6-181
Peak Hold Current Monitoring Function ...................................................6-182
Maintenance Timer Display Function .......................................................6-183
Settings Required to Use Maintenance Timer Display Function.................................6-183
Settings Required After Replacement of Cooling Fan or Electrolytic Capacitor .........6-184
7 Troubleshooting ..................................................................... 7-1
Protective and Diagnostic Functions ............................................................7-2
Fault Detection................................................................................................................7-2
Alarm Detection ............................................................................................................7-15
Operation Errors ...........................................................................................................7-19
Errors During Autotuning .............................................................................................7-21
Errors when Using the Digital Operator Copy Function................................................7-22
Troubleshooting ..........................................................................................7-24
If Constant Constants Cannot Be Set ........................................................................... 7-24
If the Motor Does Not Operate......................................................................................7-25
If the Direction of the Motor Rotation is Reversed ........................................................ 7-28
If the Motor Does Not Put Out Torque or If Acceleration is Slow ..................................7-28
If the Motor Operates Higher Than the Reference .......................................................7-28
If the Slip Compensation Function Has Low Speed Precision......................................7-29
If There is Low Speed Control Accuracy at High-speed Rotation in Open-loop
Vector Control Method .................................................................................................. 7-29
If Motor Deceleration is Slow........................................................................................7-29
If the Motor Overheats ..................................................................................................7-30
If There is Noise When the Inverter is Started or From an AM Radio ..........................7-31
If the Ground Fault Interrupter Operates When the Inverter is Run..............................7-31
If There is Mechanical Oscillation .................................................................................7-31
If the Torque Generated for the Motor is Insufficient (Insufficient Power).....................7-33
If the Torque Reference (U1-09) at Low Speeds in Open-loop Vector 2 Control is
Large Compared to That at Medium and High Speeds ................................................7-33
If Shock Occurs Near the Speed Estimator Switching Frequency in Open-loop
Vector 2 Control ............................................................................................................ 7-33
If Torque Ripple Occurs at Very Low Speeds in Open-loop Vector 2 Control ...............7-34
If the Motor Rotates Even When Inverter Output is Stopped........................................7-34
If OV is Detected When the Fan is Started, or Fan Stalls .............................................7-34
If Output Frequency Does Not Rise to Frequency Reference ......................................7-34
Acoustic Noise From the Motor .................................................................................... 7-35
8 Maintenance and Inspection.................................................. 8-1
Maintenance and Inspection.........................................................................8-2
Outline of Warranty .........................................................................................................8-2
Daily Inspection ..............................................................................................................8-2

xvi
Periodic Inspection ......................................................................................................... 8-2
Periodic Maintenance of Parts ....................................................................................... 8-3
Procedure for Adjusting Constants after Replacement of Control Board ....................... 8-3
Types and Number of Cooling Fans Used in the Drive .................................................. 8-5
Cooling Fan Replacement Outline ................................................................................. 8-6
Circulation Fan Replacement Outline........................................................................... 8-16
Removing and Mounting the Control Circuit Terminal Board ....................................... 8-21
9 Specifications ..........................................................................9-1
Standard Inverter Specifications...................................................................9-2
Specifications by Model.................................................................................................. 9-2
Common Specifications.................................................................................................. 9-4
Specifications of Options and Peripheral Devices........................................ 9-6
10 Appendix ................................................................................10-1
Varispeed G7 Control Methods .................................................................. 10-2
Control Methods and Features..................................................................................... 10-2
Control Methods and Applications................................................................................ 10-4
Inverter Application Precautions ................................................................ 10-6
Selection....................................................................................................................... 10-6
Installation .................................................................................................................... 10-7
Settings ........................................................................................................................ 10-7
Handling ....................................................................................................................... 10-8
Motor Application Precautions ................................................................... 10-9
Using the Inverter for an Existing Standard Motor........................................................ 10-9
Using the Inverter for Special Motors ......................................................................... 10-10
Power Transmission Mechanism (Speed Reducers, Belts, and Chains) ................... 10-10
Conformance to UL Standard................................................................... 10-11
Conformance to CE Markings .................................................................. 10-13
CE Markings............................................................................................................... 10-13
Requirements for Conformance to CE Markings........................................................ 10-13
Wiring Examples ...................................................................................... 10-20
Using a Braking Resistor Unit .................................................................................... 10-20
Using a Braking Unit and Braking Resistor Unit ......................................................... 10-21
Using Braking Units in Parallel ................................................................................... 10-22
Using a Braking Unit and Three Braking Resistor Units in Parallel............................ 10-23
Using a VS Operator .................................................................................................. 10-24
Using Transistors for Input Signals and a 0-V Common in Sinking Mode with an
Internal Power Supply ................................................................................................ 10-25
Using Transistors for Input Signals and a +24-V Common in Sourcing Mode ........... 10-26
Using Transistors for Input Signals and a 0-V Common in Sinking Mode with an
External Power Supply ............................................................................................... 10-27
Using Contact and Open Collector Outputs ............................................................... 10-28

xvii
User Constants .........................................................................................10-29
INDEX
Revision History

Handling Inverters
This chapter describes the checks required upon receiving or installing an Inverter.
Varispeed G7 Introduction ...........................................1-2
Confirmations upon Delivery........................................1-3
Exterior and Mounting Dimensions..............................1-6
Checking and Controlling the Installation Site .............1-9
Installation Orientation and Space .............................1-10
Removing and Attaching the Terminal Cover ............ 1-11
Removing/Attaching the Digital Operator and Front
Cover .........................................................................1-13
Removing and Attaching the Protection Cover..........1-17