Omron L7Z QUICK GUIDE
Cat.No. I62E-EN-01
L7Z
Quick Start Guide
L7Z Quick Start Guide
Table of Contents
Warnings..............................................................................1
Safety Precautions and Instructions ................................................................... 2
EMC Compatibility .............................................................................................. 3
Installation ...........................................................................5
Mechanical Installation ....................................................................................... 5
Electrical Connection .......................................................................................... 6
Keypad Operation ............................................................. 11
Digital Operator Display (optional) ................................................................... 11
Power Up and Basic Parameter Setup ............................12
Start Up Procedure ........................................................................................... 12
Before Power Up .............................................................................................. 13
Display after Power Up ..................................................................................... 13
Control Mode Selection .................................................................................... 13
Autotuning .........................................................................14
Autotuning Mode Selection .............................................................................. 14
Autotuning Alarms and Faults .......................................................................... 15
Autotuning Procedure with Induction Motors ................................................... 16
Autotuning Procedure for PM Motors ............................................................... 17
PM Motor Encoder Offset Tuning ..................................................................... 18
Ride Profile and Sequence Setup....................................19
Up and Down Commands and Speed Reference Selection ............................. 19
Speed Selection Sequence Using Digital Inputs .............................................. 19
Acceleration / Deceleration / Jerk Settings ....................................................... 22
Brake Sequence ............................................................................................... 22
Inertia Compensation (Feed Forward) ............................................................. 22
Troubleshooting ................................................................24
Fault and Alarm Detection ................................................................................ 24
Operator Programming Errors (OPE) ............................................................... 26
Auto-tuning Faults ........................................................................................... 27
Parameter Table ................................................................28
Warnings
Cables must not be connected or disconnected, nor signal tests carried out, while the power is
switched on.
The Varispeed L7 DC bus capacitor remains charged even after the power has been switched off. To
avoid an electric shock hazard, disconnect the frequency inverter from the mains before carrying out
maintenance. Then wait for at least 5 minutes after all LEDs have gone out.
Do not perform a withstand voltage test on any part of the inverter. It contains semiconductors,
which are not designed for such high voltages.
Do not remove the digital operator while the mains supply is switched on. The printed circuit board
must also not be touched while the inverter is connected to the power.
Never connect general LC/RC interference suppression filters, capacitors or overvoltage protection devices to
the inverter input or output.
CAUTION
To avoid unnecessary over current faults, etc., being displayed, the signaling contacts of any contactor or switch fitted between inverter and motor must be integrated into the inverter control logic
(e.g. baseblock).
This is absolutely imperative!
This manual must be read thoroughly before connecting and operating the inverter. All safety precautions and instructions for use must be followed.
The inverter must be operated with the appropriate line filters, following the installation instructions
in this manual and with all covers closed and terminals covered.
Only then will adequate protection be provided. Please do not connect or operate any equipment
with visible damage or missing parts. The operating company is responsible for any injuries or
equipment damage resulting from failure to heed the warnings in this manual.
EN-1
Safety Precautions and Instructions
1. General
Please read these safety precautions and instructions for use thoroughly before installing and operating this
inverter. Also read all of the warning signs on the inverter and ensure they are never damaged or removed.
Live and hot inverter components may be accessible during operation. Removal of housing components, the
digital operator or terminal covers runs the risk of serious injuries or damage in the event of incorrect installation or operation. The fact that frequency inverters control rotating mechanical machine components can give
rise to other dangers.
The instructions in this manual must be followed. Installation, operation and maintenance may only be carried
out by qualified personnel. For the purposes of the safety precautions, qualified personnel are defined as individuals who are familiar with the installation, starting, operation and maintenance of frequency inverters and
have the proper qualifications for this work. Safe operation of these units is only possible if they are used
properly for their intended purpose.
The DC bus capacitors can remain live for about 5 minutes after the inverter is disconnected from the power. It
is therefore necessary to wait for this time before opening its covers. All of the main circuit terminals may still
carry dangerous voltages.
Children and other unauthorized persons must not be allowed access to these inverters.
Keep these Safety Precautions and Instructions for Use readily accessible and supply them to all persons with
any form of access to the inverters.
2. Intended Use
Frequency inverters are intended for installation in electrical systems or machinery.
Their installation in machinery and systems must conform to the following product standards of the Low Voltage Directive:
EN 50178, 1997-10,Equipping of Power Systems with Electronic Devices
EN 60204-1, 1997-12Machine Safety and Equipping with Electrical Devices
Part 1: General Requirements (IEC 60204-1:1997)/
Please note: Includes Corrigendum of September 1998
EN 61010-1, A2, 1995Safety Requirements for Information Technology Equipment
(IEC 950, 1991 + A1, 1992 + A2, 1993 + A3, 1995 + A4, 1996, modified)
CE marking is carried out to EN 50178, using the line filters specified in this manual and following the appropriate installation instructions.
3. Transportation and storage
The instructions for transportation, storage and proper handling must be followed in accordance with the technical data.
4. Installation
Install and cool the inverters as specified in the documentation. The cooling air must flow in the specified
direction. The inverter may therefore only be operated in the specified position (e.g. upright). Maintain the
specified clearances. Protect the inverters against impermissible loads. Components must not be bent nor insulation clearances changed. To avoid damage being caused by static electricity, do not touch any electronic
components or contacts.
EN-2
5. Electrical Connection
Carry out any work on live equipment in compliance with the national safety and accident prevention regulations. Carry out electrical installation in compliance with the relevant regulations. In particular, follow the
installation instructions ensuring electromagnetic compatibility (EMC), e.g. shielding, grounding, filter
arrangement and laying of cables. This also applies to equipment with the CE mark. It is the responsibility of
the manufacturer of the system or machine to ensure conformity with EMC limits.
Contact your supplier or Omron-Yaskawa Motion Control representative when using leakage current circuit
breaker in conjunction with frequency inverters.
In certain systems it may be necessary to use additional monitoring and safety devices in compliance with the
relevant safety and accident prevention regulations. The frequency inverter hardware must not be modified.
If Permanent Magnet Motors are used:
If a PM motor is turned by any external force, high voltage is generated in the windings.
• During wiring, maintenance or inspection make sure, that the motor is stopped and can not turn.
• If the inverter is turned off and the motor must be turned, make sure that motor and inverter output are
electrically disconnected.
6. Inverter Setup
This L7 inverter can drive induction motors as well as permanent magnet motors.
Always select the appropriate control mode:
• For induction motors use V/f, Open Loop Vector or Closed Loop Vector control (A1-01 = 0, 2 or 3).
• For permanent magnet motors use no other control mode than Closed Loop Vector for PM (A1-01 = 6).
A wrong control mode selection can damage the inverter and motor.
If a motor is exchanged or operated the first time, always set up the motor control relevant parameters using
the nameplate data or perform autotuning. Do not change the parameters recklessly. To ensure a safe operation
with PM motors always set the:
• correct motor data
• the PG open detection parameters
• the speed deviation detection parameters
• the over acceleration detection parameters
Wrong parameter settings can cause dangerous behavior or motor and inverter damage.
Refer to page 12, Start Up Procedure for details about the correct start up procedure.
7. Notes
The Varispeed L7 frequency inverters are certified to CE, UL, and c-UL.
EMC Compatibility
1. Introduction
This manual was compiled to help system manufacturers using Omron-Yaskawa Motion Control frequency
inverters to design and install electrical switch gear. It also describes the measures necessary to comply with
the EMC Directive. The manual's installation and wiring instructions must therefore be followed.
EN-3
Our products are tested by authorized bodies using the standards listed below.
Product standard: EN 61800-3:1996
EN 61800-3; A11:2000
2. Measures to Ensure Conformity of Omron-Yaskawa Motion Control Frequency
Inverters to the EMC Directive
Omron-Yaskawa Motion Control frequency inverters do not necessarily have to be installed in a switch cabinet.
It is not possible to give detailed instructions for all of the possible types of installation. This manual therefore
has to be limited to general guidelines.
All electrical equipment produces radio and line-borne interference at various frequencies. The cables pass
this on to the environment like an aerial.
Connecting an item of electrical equipment (e.g. drive) to a supply without a line filter can therefore allow HF
or LF interference to get into the mains.
The basic countermeasures are isolation of the wiring of control and power components, proper grounding and
shielding of cables.
A large contact area is necessary for low-impedance grounding of HF interference. The use of grounding
straps instead of cables is therefore definitely advisable.
Moreover, cable shields must be connected with purpose-made ground clips.
3. Laying Cables
Measures Against Line-Borne Interference:
Line filter and frequency inverter must be mounted on the same metal plate. Mount the two components as
close to each other as possible, with cables kept as short as possible.
Use a power cable with well-grounded shield. Use a shielded motor cable not exceeding 20 meters in length.
Arrange all grounds so as to maximize the area of the end of the lead in contact with the ground terminal (e.g.
metal plate).
Shielded Cable:
• Use a cable with braided shield.
• Ground the maximum possible area of the shield. It is advisable to ground the shield by connecting the
cable to the ground plate with metal clips (see following figure).
Ground clip
The grounding surfaces must be highly conductive bare metal. Remove any coats of varnish and paint.
– Ground the cable shields at both ends.
– Ground the motor of the machine.
Ground plate
EN-4
Installation
Mechanical Installation
Unpacking the Inverter
Check the following items after unpacking the inverter.
Item Method
Has the correct model of Inverter been delivered? Check the model number on the nameplate on the side of the Inverter.
Is the Inverter damaged in any way?
Are any screws or other components loose? Use a screwdriver or other tools to check for tightness.
If you find any irregularities in the above items, contact the agency from which you purchased the Inverter or
your Omron-Yaskawa Motion Control representative immediately.
Checking the Installation Site
Before installing the inverter check the following:
• Make sure that the ambient temperature is not exceeded
• Install the Inverter in a clean location which is free from oil mist and dust. It can be installed in a totally
enclosed panel that is completely shielded from floating dust.
• When installing or operating the Inverter, always take special care so that metal powder, oil, water, or other
foreign matter does not get into the Inverter.
• Do not install the Inverter on combustible material, such as wood.
• Install the Inverter in a location free from radioactive materials and combustible materials.
• Install the Inverter in a location free from harmful gasses and liquids.
• Install the Inverter in a location without excessive oscillation.
• Install the Inverter in a location free from chlorides.
• Install the Inverter in a location free from direct sunlight.
Inspect the entire exterior of the Inverter to see if there are any scratches or other
damage resulting from shipping.
Installation Orientation
Install the Inverter vertically so as not to reduce the cooling effect. When installing the Inverter, always provide the following installation space to allow normal heat dissipation.
Air
A B
50 mm 120 mm
Air
50 mm min.
IMPORTANT
A
30 mm min.
30 mm min.
Horizontal Space
1. The same space is required horizontally and vertically for IP00, IP20 and NEMA 1 Inverters.
2. Always remove the top protection cover after installing an Inverter with an output of 18.5 kW or less in a
panel.
Always provide enough space for suspension eye bolts and the main circuit lines when installing an
Inverter with an output of 22 kW or more in a panel.
B
120 mm min.
Vertical Space
EN-5
Electrical Connection
Installation of Inverters and EMC filters
PEL1L2
L3
Ground Bonds
Remove any paint!
For an EMC rules compliant installation consider the following
points:
• Use a line filter.
• Use shielded motor cables.
• Mount the inverter and filter on a grounded conductive plate.
• Remove any paint or dirt before mounting the parts in order to
reach the lowest possible grounding impedance.
Wiring Main Circuit Inputs
PE
Line
Filter
Load
Cable Length
as short as possible
Grounded
Metal Plate
GND
Ground Bonds
Remove any paint!
Inverter
L2
U
L1
L3
V
M
~3
W
GND
Screened
Motor cable
Consider the following precautions for the main circuit power supply input.
• If a moulded case circuit breaker is used for the power supply connection (R/L1, S/L2, and T/L3), ensure
that the circuit breaker is suitable for the Inverter.
• If an earth leakage breaker is used, it should be able to detect all kinds of current should be used in order to
ensure a safe earth leakage current detection
• A magnetic contactor or other switching device can be used at the inverter input. The inverter should not
be powered up more than once per hour.
• The input phases (R/S/T) can be connected in any sequence.
• If the Inverter is connected to a large-capacity power transformer (600 kW or more) or a phase advancing
capacitor is switched nearby, an excessive peak current could flow through the input power circuit, causing
an inverter damage. As a countermeasure install an optional AC Reactor at the inverter input or a DC reactor at the DC reactor connection terminals.
• Use a surge absorber or diode for inductive loads near the Inverter. Inductive loads include magnetic con-
tactors, electromagnetic relays, solenoid valves, solenoids, and magnetic brakes.
Wiring the Output Side of the Main Circuit
The following precautions should be considered for the output circuit wiring.
• Never connect any power source to the inverter output terminals. Otherwise the inverter can be damaged.
• Never short or ground the output terminals. Otherwise the inverter can be damaged.
• Do not use phase correction capacitors. Otherwise the inverter and capacitors can be damaged.
• Check the control sequence to make sure, that the magnetic contactor (MC) between the Inverter and
motor is not turned ON or OFF during inverter operation. If the MC is turned ON during the Inverter is
operation, a large inrush current will be created and the inverter’s over current protection may operate.
Ground Connection
The following precautions should be considered for the ground connection.
• Do not share the ground wire with other devices, such as welding machines or power tools.
• Always use a ground wire, that complies with technical standards on electrical equipment and minimize
the length of the ground wire.
EN-6
Leakage current is caused by the Inverter. Therefore, if the distance between the ground electrode and the
ground terminal is too long, potential on the ground terminal of the Inverter will become unstable.
• When more than one Inverter is used, do not to loop the ground wire.
OK
NO
Fig 1 Ground Wiring
Control Circuit Wiring Precautions
Consider the following precautions for wiring the control circuits.
• Separate control circuit wiring from main circuit wiring (terminals R/L1, S/L2, T/L3, B1, B2, U/T1, V/T2,
W/T3, , 1, 2, and 3, PO, NO) and other high-power lines.
• Separate wiring for control circuit terminals MA, MB, MC, M1, M2, M3, M4, M5, and M6 (contact out-
puts) from wiring to other control circuit terminals.
• If an optional external power supply is used, it should be a UL Listed Class 2 power supply.
• Use twisted-pair or shielded twisted-pair cables for control circuits to prevent operating faults.
• Ground the cable shields with the maximum contact area of the shield and ground.
• Cable shields have to be grounded on both cable ends.
Main Circuit Terminals
Main circuit terminal functions are summarized according to terminal symbols in Table 1. Wire the terminals
correctly for the desired purposes.
Table 1 Main Circuit Terminal Functions (200 V Class and 400 V Class)
Purpose Terminal Symbol
Main circuit power input
Inverter outputs U/T1, V/T2, W/T3 23P7 to 2055 43P7 to 4055
DC bus terminals
Braking Resistor Unit connection B1, B2 23P7 to 2018 43P7 to 4018
DC reactor connection
Braking Unit connection
Ground 23P7 to 2055 43P7 to 4055
Control Power Supply PO, NO 23P7 to 2055 43P7 to 4055
R/L1, S/L2, T/L3 23P7 to 2055 43P7 to 4055
R1/L11, S1/L21, T1/L31 2022 to 2055 4022 to 4055
1,
1, 2
3,
Model: CIMR-L7Z
200 V Class 400 V Class
23P7 to 2055 43P7 to 4055
23P7 to 2018 43P7 to 4018
2022 to 2055 4022 to 4055
EN-7
Control Circuit Terminals
Fig 2 shows the control terminal arrangement. The functions of the control circuit terminals are shown in
Table 2. Use the appropriate terminals for the correct purposes.
E(G)
SC SC SC
S1
S2
BB
S3 S4
Fig 2 Control terminal arrangement
+V
A1 AC
S5 S6 S7 BB1
M5
M6
M3
MA MB MC
M4
M1
M2
E(G)
Table 2 Control Circuit Terminals with default settings
Type No. Signal Name Function Signal Level
S1 Forward run/stop command Forward run when ON; stopped when OFF.
S2 Reverse run/stop command Reverse run when ON; stopped when OFF.
S3 Nominal speed Nominal speed when ON.
Dig-
input
signals
S4 Inspection Run Inspection RUN when ON.
S5 Intermediate speed
ital
Intermediate speed when
ON.
S6 Leveling speed Leveling speed when ON.
S7 Not used –
BB Hardware baseblock Both inputs must be enabled to enable the inverter
outputBB1 Hardware baseblock 1
SC Digital input common – –
Ana-
input
signals
Dig-
output
signals
+V
log
15 V power supply
A1 Frequency reference 0 to +10 V/100% 0 to +10 V(20 kΩ)
AC Analog reference neutral – –
Shield wire, optional ground line
E(G)
connection point
M1
Brake command
(1NO contact)
M2
M3
ital
*1. Do not use this power supply for supplying any external equipment.
*2. When driving a reactive load, such as a relay coil with DC power supply, always insert a flywheel diode as shown in Fig 3.
Contactor Control
(1NO contact)
M4
M5
Inverter Ready
(1NO contact)
M6
MA
Fault output signal (SPDT)
MB
(1 Change over contact)
MC
*1
15 V power supply for analog references
––
Brake command when ON.
Contactor Control when ON
Inverter Ready when ON.
Fault when CLOSED across MA and MC
Fault when OPEN across MB and MC
Functions are
selected by setting
H1-01 to H1-05.
Multi-function contact outputs
24 VDC, 8 mA
Photo-coupler
15 V
(Max. current: 20 mA)
Relay contacts
Contact capacity:
1 A max. at 250 VAC
1 A max. at 30 VDC
*2
Flywheel diode
The rating of the flywheel diode must
External power: 30
VDC max.
Coil
1 A max.
be at least as high as the circuit voltage.
Fig 3 Flywheel Diode Connection
1. In Fig 4 the wiring of the digital inputs S1 to S7 and BB, BB1 is shown for the connection of contacts or NPN
transistors (0V common and sinking mode). This is the default setting.
For the connection of PNP transistors or for using a 24V external power supply, refer to Ta ble 3.
IMPORTANT
2. A DC reactor is an option only for Inverters of 18.5 kW or less. Remove the short circuit bar when connecting a
DC reactor.
Sinking/Sourcing Mode (NPN/PNP Selection)
The input terminal logic can be switched over between sinking mode (0-V common, NPN) and sourcing mode
(+24V common, PNP) by using the jumper CN5. An external power supply is also supported, providing more
freedom in signal input methods.
EN-8
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