Delta VFD-L series User Manual

VFD-L Series

Preface
Thank you for choosing DELTA’s VFD-L series AC Drive. The VFD-L series is
manufactured using high-quality components, material and incorporating the
latest microprocessor technology available.

 Getting Started

This manual will help in the installation, parameter setting, troubleshooting, and daily

maintenance of the AC motor drive. To guarantee safe operation of the equipment, read

the following safety guidelines before connecting power to the AC motor drive. Keep this

operating manual handy and distribute to all users for reference.

!

WARNING

!

Always read this manual thoroughly before using VFD-L series AC Motor Drives.

!

DANGER!

AC input power must be disconnected before any maintenance. Do
not connect or disconnect wires and connectors while power is applied to the
circuit. Maintenance must be performed by qualified technicians.

!

CAUTION! There are highly sensitive MOS components on the printed circuit boards.

These components are especially sensitive to static electricity. To avoid damage to
these components, do not touch these components or the circuit boards with metal
objects or your bare hands.

!

DANGER! A charge may still remain in the DC-link capacitor with hazardous voltages

even if the power has been turned off. To avoid personal injury, do not remove the
cover of the AC drive until all “DISPLAY LED” lights on the digital keypad are off.
Please note that there are live components exposed within the AC drive. Do not touch
these live parts.

!

CAUTION! Ground the VFD-L using the ground terminal. The grounding method

must comply with the laws of the country where the AC drive is to be installed. Refer to
Basic Wiring Diagram.

!

DANGER! The AC drive may be destroyed beyond repair if incorrect cables are

connected to the input/output terminals. Never connect the AC drive output terminals
U/T1, V/T2, and W/T3 directly to the AC main circuit power supply.

DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED

VFD-L Series

CHAPTER 1 RECEIVING AND INSPECTIONS

1.1 Nameplate Information ....................................................................... 1 - 1

1.2 Model Explanation ..............................................................................1 - 1

1.3 Serial Number Explanation................................................................. 1 - 2

CHAPTER 2 STORAGE AND INSTALLATION

2.1 Storage ............................................................................................... 2 - 1

2.2 Installation ..........................................................................................2 - 2

CHAPTER 3 WIRING

3.1 Basic Wiring Diagram .........................................................................3 - 2

3.2 Terminal Explanation .......................................................................... 3 - 3

3.3 Control Terminal Explanation.............................................................. 3 - 3

3.4 Main Circuit Wiring ............................................................................3 - 4

3.5 Wiring Notes .......................................................................................3 - 5

CHAPTER 4 DIGITAL KEYPAD OPERATION

4.1 Description of the Digital Keypad VFD-PU01 ..................................... 4 - 1

4.2 Operation steps of the Digital Keypad VFD-PU01.............................. 4 - 2

CHAPTER 5 DESCRIPTION OF PARAMETER SETTINGS

Group 0: User Parameters .......................................................................5 - 1

Group 1: Basic Parameters ...................................................................... 5 - 4

Group 2: Operating Method Parameters .................................................. 5-10

Group 3: Output Function Parameters .....................................................5-13

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VFD-L Series

Group 4: Input Function Parameters ........................................................ 5-16

Group 5:Multi-step Speed and PLC (Process Logic Control) Parameter..5- 2 7

Group 6: Protection Parameters............................................................... 5-32

Group 7: Motor Parameters...................................................................... 5-35

Group 8: Special Parameters ................................................................... 5-36

Group 9: Communication Parameters ......................................................5-40

CHAPTER 6 MAINTENANCE AND INSPECTIONS

6.1 Periodic Inspection ............................................................................. 6 - 1

6.2 Periodic Maintenance .........................................................................6 - 1

CHAPTER 7 TROUBLESHOOTING AND FAULT INFORMATION........... 7 - 1

CHAPTER 8 SUMMARY OF PARAMETER SETTINGS............................ 8 - 1

APPENDIX A SPECIFICATIONS ............................................................... A - 1

APPENDIX B ACCESSORIES

B.1 Non-fused Circuit Breaker and Fuse Specification Chart ...................B - 1

APPENDIX C DIMENSIONS....................................................................... C - 1

APPENDIX D EC DECELERATION OF CONFORMITY ............................ D - 1

DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED

1

VFD-L Series

1-1

MODE :VFD007L21A

INPUT :1PH/9.7A 3PH/5.1A 200-240V 50-60Hz

OU T PU T :3PH 0-240V 4.2A 1.6kVA 1H P

Freq. Ra nge:1.0~40 0Hz

DELTA ELE CTRONICS , IN C. MADE IN TAIWAN

007L21AT101001

AC Drive Model

Input Spec.

Output Spec.

Output Freq. Range

Bar Code

Serial NO.

VFD 007 L 21 A

version

A standard

B including EMI

Filter

VFD-L series

Inp ut vo ltag e

002:0.2kW

004:0.4kW

007:0.75kW

015:1.5kW

A p plic a ble mo to r c ap a city

Variable Frequency Drive

CHAPTER 1 RECEIVING AND INSPECTION

This VFD-L AC drive has gone through rigorous quality control tests at the factory before
shipment. After receiving the AC drive, please check for the following:

Receiving

Check to make sure that the package includes an AC drive, the User Manual, dust

'

covers and rubber bushings.
Inspect the un i t to in sure it was no t dama ged du r ing sh ipm en t.

'

Make sure that the part number indicated on the nameplate corresponds with the part

'

number of your order.

1.1 Nameplate Information:

Example for 1HP/230V AC drive

1.2 Model Explanation:




DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

1

VFD-L Series

1-2

Production number

Production week

Production year 2002

Production factory

(T: Taoyuan, W: Wujuang)

I

y

p

1.3 Series Number Explanation:

f there is any nameplate information not corresponding to your purchase order or an

roblem, please contact your distributor.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

2

2-1

O

A
A
I
V

S

T
R

A

T

T
R
A
V
m

P

2

VFD-L Series

CHAPTER 2 STORAGE AND INSTALLATION

2.1 Storage

The AC drive should be kept in the shipping carton before installation. In order to retain the
warranty coverage, the AC drive should be stored properly when it is not to be used for an
extended period of time.

Ambient Conditions:

peration

ir Temperature: -10oC to +40oC (14oF to 104oF)
tmosphere pressure: 86 to 106 kPa

nstallation Site Altitude: below 1000m

ibration: Maximum 9. 86 m/s2 (1G) at less than 20Hz

Maximum 5.88 m/s2 (1G) at 20Hz to 50Hz

torage

ransportation

ollution Degree

emperature: -20oC to +60oC (-4oF to 140oF)

elative Humidity: Less than 90%, no condensation allowed
tmosphere pressure: 86 to 106 kPa

emperature: -20oC to +60oC (-4oF to 140oF)

elative Humidity: Less than 90%, no condensation allowed
tmosphere pressure: 86 to 106 kPa
ibration: Maximum 9. 86 m/s2 (1G) at less than 20Hz, Maximum 5.88

/s2 (1G) at 20Hz to 50Hz

: good for a factory type environment.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

2-2

150mm (6 inches )

Air Flow

or mor e

or mor e

Metal Container

VFD

-L

50mm

(2 inc hes)

or mor e

50mm

(2 inc hes)

or mor e

150mm (6 inches )

Minimum Clearances and Air Flow

2.2 Installation:

CAUTION

The control, power supply and motor leads must be laid separately. The y must not be
fed through the same cable conduit / trunking.

High voltage insulation test equipment must not be used on cables connected to the
drive.

Improper installation of the AC drive will greatly reduce its life. Be sure to observe the
following precautions when selecting a mounting location.

Failure to observe these precautions may void the warranty!



Do not mount the AC drive near heat-radiating elements or in direct sunlight.



Do not install the AC drive in a place subjected to high temperature, high humidity,
excessive vibration, corrosive gases or liquids , or airborne dust or metallic particles.



Mount the AC drive vertically and do not restrict the air flow to the heat sink fins.



The AC drive generates heat. Allow sufficient space around the unit for heat dissipation.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

3

VFD-L Series

3-1

CHAPTER 3 WIRING

DANGER

Hazardous Voltage

Before accessing the AC drive:

Disconnect all power to the AC drive.



Wait five minutes for DC bus capacitors discharge.



Any electrical or mechanical modification to this equipment without prior written
consent of Delta Electronics, Inc. will void all warranties and may result in a safety
hazard in addition to voiding the UL listing.

General Wiring Information



Applicable Codes
All VFD-L AC drives are Underwriters Laboratories, Inc. (UL) and Canadian Underwriters

Laboratories (cUL) listed, and therefore comply with the requirements of the National
Electrical Code (NEC) and the Canadian Electrical Code (CEC).

Installation intended to meet the UL and cUL requirements must follow the instructions
provided in “W iring Notes” as a minimum standard. Follow all local codes that exceed UL
and cUL requirements. Refer to the technical data label affixed to the AC drive and the
motor nameplate for el ectr i cal data.

The "Line Fuse Specification" in Appendix B, lists the recommended fuse part number for
each B-Series part number. These fuses (or equivalent) must be used on all installations
where compliance with U.L. standards is a required.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

3-2

RS-485

61

RARC120VAC/28VDC 3A

010VDC

VR 3K 5K

AV I

GND

+10V 10mA(MAX)

321

VR

RJ-11

1:+EV

2:GND

3:SG-

4:SG+

+18V

+18V

+18V

M0M1M2

GND

+18V

4.7K

M3

4.7K

4.7K

4.7K

Factory default settings

Forward/Stop

Reverse/Stop

Reset

M u lti-s te p 1

Common Signal

P o w e r su p ply fo r Po te n tiome te r

Master Freq. setting

Analog voltage

Analog current

Motor

Multi-function indication

output contacts

Factory default:

Fault Indication

Main circuit (power)

ter min als

Co ntrol circuit terminals

S h ie ld ed le a d s

*

If the AC Drive model is VFD 002L11A/B, VF D004L11A/B, VFD 002L21B, VFD 004L21B

or VF D 007 L21 B , please use pow er term inals R /L1 and S/L2.

*If the AC Drive m odel is VFD 002L21A, VFD 004L21A or VFD007L21A, 3 phase pow er

may be used on R /L1, S/L2, T/L3.

*If the AC Dr iv e mo d e l is V F D015 L 2 3 A, sin g le p h a s e p owe r is no t allo we d .

NO TE: Do not plug in a Modem or telephone line to the R S-485 comm unication port,

perm anent dam age m ay result. Terminals 1 & 2 are the pow er source for the

o ptional c opy k eypad a nd s hould not be us ed whi le usi ng RS-485

c om mu n i c ation.

Main Circuit Power

Communication

p o rt

+10V

3.1 Basic Wiring Diagram

Users must connect wiring according to the circuit diagram shown below. Please follow all
National and State wiring codes, when wiring the VFD-L.



5/

5/

87

6/

7/

6/

7/

è

è

è

è

97

:7

,0

a

'





è

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

3

VFD-L Series

3-3

RA

RC

+10V

AV I

M0

M1

M2

M3

GND

Relay

Wire Gauge:22-24AWG

Torque: 4Kgf-cm

3.2 Terminal Explanations

Terminal Symbol Explanation of Terminal Function

R/L1, S/L2, T/L3 AC line input terminals

U/T1, V/T2, W/T3 AC drive output terminals motor connections

Earth Ground

3.3 Control Terminals Explanations

M

o

(

1

u

u

2

t

l

p

0

t

i

u

V

-

f

t

A

u

c

C

n

o

c

/

n

D

t

t

i

a

o

C

c

n

2

t

i

8

n

V

d

i

3

c

A

a

)

t

i

o

n

P
o

w
e

r
f

o
r

s

p

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d
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e
t

t

i

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g

f

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q

u
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n
c

y
c

o

m
m
a

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d

A
n
a

l

o
g

V
o
l

t

a
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e
,

c

u

r

r

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n
t

M
u

l

t

i

-

f

u
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c

t

i

o

n
a

s

s

i

s

t

a

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t

e

r

m
i

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a

l

M
u

l

t

i

-

f

u

n
c

t

i

o
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i

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p

u
t

s

e

l

e

c

t

i

o
n

1

M
u

l

t

i

-

f

u

n
c

t

i

o
n

i

n
p

u
t

s

e

l

e

c

t

i

o
n

2

M
u

l

t

i

-

f

u

n
c

t

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p

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3

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Terminal Symbols Terminal Functions Factory Settings

MI0
MI1
MI2
MI3

Multi-function Input 0
Multi-function Input 1
Multi-function Input 2
Multi-function Input 3

Multi-function Relay output

RA
RC

(N.O.) a
Multi-function Relay common

+10V

Potentiometer power source

AVI Analog voltage/ Input current

* Control signal wiring size: 22-24 AWG (0.3-0.2 mm2).

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

Refer to Pr.04-04 to Pr.04-06
Multi-function Input Terminals

120Vac, 3A
24Vdc, 3A

Refer to Pr.03-03

+10V 20mA
0 to +10V / 4 to 20mA

VFD-L Series

3-4

Single phase m odels input from R/L1, S/L2

A C lin e in p u t ter min a ls

grounding

UP/DOWN

Function

Display key

Data

Co nfirm ation key

RUN/STOP

RS485

communication

port

Grounding

Motor connections U/T1, V/T2, W /T3

Motor capacity

and input power

Frequency

setting knob

LED display

The sig nal selection

f or A VI to i np ut

DC0-+10V

or 4-20 m A

U/T1

V/T2

W/T3

R/L1

S/L2

T/L3

3.4 Main Circuit Wiring

Control Terminal
Torque: 4Kgf-cm (3 in-lbf)
Wire: 22-24 AWG

Power Terminal
Torque: 5Kgf-cm (4.33 in-lbf)

Wire: 12-20 AWG

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

3

VFD-L Series

3-5

Forward

running

3.5 Wiring Notes:

1.



CAUTION: Do not connect the AC power to the U/T1, V/T2, W/T3 terminals, as it

PLEASE READ PRIOR TO INSTALLATION.

will damage the AC drive.

2.



WARNING: Ensure all screws are tightened to the proper torque rating.

3. During installation, follow all local electrical, construction, and safety codes for the
country the drive is to be installed in.

4. Ensure that the appropriate protective devices (circuit breaker or fuses) are connected
between the power supply and AC drive.

5. Make sure that the leads are connected correctly and the AC drive is properly grounded.
(Ground resistance should not exceed 0.18.)

6. Use ground leads that comply with AWG/MCM standards and keep them as short as
possible.

7. Multiple VFD-L units can be installed in one location. All the units should be grounded
directly to a common ground terminal. The VFD-L ground terminals may also be
connected in parallel, as shown in the figure below. Ensure there are no ground
loops.

8. When the AC drive output terminals U/T1, V/T2, and W /T3 are connected to the motor
terminals U/T1, V/T2, and W/T3, respectively, the motor will rotate counterclockwise (as
viewed from the shaft ends of the motor) when a forward operation command is received.
To reverse the direction of motor rotation, switch over any of the two motor leads.

9. Make sure that the power source is capable of supplying the correct voltage and
required current to the AC drive.

10. Do not attach or remove wiring when power is applied to the AC drive.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

3-6

11. Do not monitor the signals on the circuit board while the AC drive is in operation.

12. For the single-phase rated AC drives, the AC power can be connected to any two of the
three input terminals R/L1, S/L2, T/L3.

with single-phase motors.

13. Route the power and control wires separately, or at 90

Note: This drive is not intended for the use

+

ang le to each other.

14. If a filter is required for reducing EMI (Electro Magnetic Interference), install it as close
as possible to AC drive. EMI can also be reduced by lowering the Carrier Frequency.

15. If the AC drive is installed in the place where a load reactor is needed, install the filter
close to U/T1, V/T2, W/T3, side of AC drive. Do not use a Capacitor or L-C Filter
(Inductance-Capacitance) or R-C Filter (Resistance-Capacitance), unless approved by
Delta.

16. When using a GFCI (Ground Fault Circuit Interrupt), select current sensor with sensitivity
of 200mA, and not less than 0.1-second detection to avoid nuisance tripping.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

4

4-1

CHAPTER 4 DIGITAL KEYPAD OPERATION

UP/DOWN

Function

Display key

Data

Confirm ation key

RUN/STOP

Frequency

setting knob

LED display

U/T1

V/T2

W/T3

R/L1

S/L2

T/L3

RS-485

M

B

e

s

e

s

P

P

d

d

R

P

p

t

4.1 Description of Digital Keypad

This digital keypad includes two parts: Display panel and keypad. Display panel
provides the parameter display and shows operation status of the AC drive. Keypad
provides programming interface between users and AC drives.

VFD-L Series

ode/Reset

y pressing the ³mode´ key repetitively, the display will show status at the AC driv
uch as the reference frequency, output frequency, and output current. If the driv
tops due to a fault, correct the fault first, then press this key to reset the drive.

ROG/DATA

ressing the ³PROG/DATA´ key will store entered data or can show factory store
ata.

un/Stop

ress to Start or Stop the AC drive operation. This key can only be used to Sto

he AC Drive when the drive is controlled by the External Control Terminals.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

4-2

U

P

e

k

s.

P

in

s

n

a

e

d

VFD-L Series

p / Down

ress the “Up” or “Down” keys momentarily to change parameter settings. Thes
eys may also be used to scroll through different operating values or parameter

ressing the “Up” or “Down” key momentarily, will change the parameter settings
ingle-unit increments. To quickly run through the range of settings, press dow
nd hold the key.

4.2 Explanations of Display Messages

Display Messag

The AC drive Master Frequency
The Actual Operation Frequency present at terminals U/T1, V/T2, and

W/T3.
The output current present at terminals U/T1, V/T2, and W/T3

Descriptions

The custom unit (u), where u = H x Pr 0-05.
The counter value (C)
The internal PLC process step currently being performed.
The DC−BUS voltage

The output voltage

The specified parameter group

The specified parameter
The actual value stored within the specified parameter.
AC drive forward run status
AC drive reverse run status

“End” displays for approximately 0.5 second if input has been
accepted. After a parameter value has been set, the new value is

automatically stored in memor y. To modify an entry, use the an

“Err” displays, if the input is invalid.

keys.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-1

I

F

R

F

P

F

S

F

CHAPTER 5 DESCRIPTION OF PARAMETER SETTINGS

Group 0: User Parameters

0 - 00

Settings None

dentity Code of AC Motor Drive

actory setting: d #

Watts / hp 40W 100W 1/4hp 1/2hp 1hp 2hp

115V / 230V



This parameter shows the capacity of the AC drive. Users can read Pr.0-01 to check if it

d 1 d 2 d 3 d 4 d 5 d 6

is the rated current of the AC drive corresponds to the identity code shown above and
the current shown below.

0 - 01

Settings None Unit: 0.1A

ated Current Display of the AC drive

V / HP 40W 100W 1/4hp 1/2hp 1hp 2hp

115V / 230V



This parameter displays the rated current of the AC drive. It will display based on Pr.0-00,

0.4A 0.8A 1.6A 2.5A 4.2A 7.0A

and is read-only.

0 - 02

Settings d 0 to d 9 Not used

arameter Reset

actory Setting: d ##.#

actory Setting: d 0

d 10 All parameters are reset to be factory settings



This setting allows the user to return all parameters to the factory default settings.

0 - 03

Settings d 0 Display the Master Frequency (F)

tart-up Display Selection

d 1 Display the actual operation frequency (H)
d 2 Display the content of users-defined unit

d 3 Display the output current (A

This parameter can be set during operation.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

actory Setting: d 0

5-2

C

F

U

F

T
A

e

d
A

i
t

T
o
i
n

0-05

VFD-L Series

0 - 04

Settings d 0 Display the user-defined unit (u)

ontent of User Defined Unit

d 1 Display the counter value (C)
d 2 Display the content of PLC time (1 – tt)
d 3 Display the DC BUS voltage (U)
d 4 Display the output voltage (E)

This parameter can be set during operation.

actory Setting: d 0

Note: Display the user-defined unit, where unit = H



0 - 05

Settings d 0.1 to d 160 Unit: 0.1

ser Defined Coefficient K

actory Setting: d 1.0

This parameter can be set during operation.



The coefficient K determines the multiplying factor for the user-defined unit.

The display value is calculated as follows:
Display value =(output frequency x K)



The display window is only capable of showing three digits, yet you could use Pr.0-05 to

create larger numbers. The display windows uses decimal points to signify numbers up
to five digits as illustrated in the next page:

Number Represented

Display

999

he absence of a decimal point indicates a three –digit integer.
signal decimal point between the middle and the right-most numbers is a tru

99.9

ecimal point; it separates ones and tenths as in “30.5” (thirty and one-half).

single decimal point after the fight-most numbers is not a true decimal point;

999.

nstead it indicates that a zero follows the right-most number. For example,
he number 1230 would be display as “123.”

wo decimal points (one between the middle and the right-most numbers, and

99.9.

ne after the right-most number) are not true decimal points; instead they

ndicate that two zeros follow the right-most number. For example, the

umber 34500 would be display as “34.5.”.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-3

S

.#

P

P

F

0 - 06

Setting None

The software version is read-only that stores the version number of VFD-L series



oftware Version Factory Setting: d #

software.

0 - 07

Settings d 0 to d 999 Unit: 1

Pr.0-07 and Pr.0-08 work together to provide data security for the AC drive. When



assword Input Factory Setting: d 0

Pr.0-08 is set to a value other than 0, a password must be entered to alter the values of
parameters. The password is the number set in Pr.0-08, which ranges from 1 to 999.
Pr.0-07 is where the password is entered to allow parameter values to be altered.

Display states:



d 0: no password / correct password has been input
d 1: parameters are locked

0 - 08

assword Configuration

actory Setting: d 0

Settings d 0 to d 999 Unit: 1

For a password to be configured, the non-zero value assigned to Pr.0-08 must be



entered

twice.

In other words, set the value of Pr.0-08 to the desired value and press
the PROG/DATA key. Then, press the PROG/DATA key again to display the value of
Pr.0-08. Finally, press the PROG/DATA key again to store the displayed value, which
then becomes the password.

For example, say that Pr.0-08 is set to 111. W hen the AC drive is powered-up, all the
parameters will be locked and their values can not be changed. To permit the valu es of
parameters to be altered, navigate to Pr.0-07 and change its value to 111 (the password
configured in Pr.0-08). Then press the PROG/DATA key, and you may alter the
parameter values.

Display states:



d 0: no password
d 1: password has been set

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5-4

M

F

M

F

M

F

M

VFD-L Series

Group 1: Basic Parameters

1 – 00

aximum Output Frequency (Fo. max)

actory Setting: d 60.0

Settings d 50.0 to d 400 Hz Unit: 0.1Hz

This parameter determines the AC drive’s Maximum Output Frequency. All the AC



drive analog inputs (0 to +10V, 4 to 20mA) are scaled to correspond to the output
frequency range.

1 - 01

Settings d 10.0 to d 400Hz Unit: 0.1Hz

aximum Voltage Frequency

actory Setting: d 60.0



This value should be set according to rated frequency of the motor as indicated on the
motor nameplate. Maximum Voltage Frequency determines the volts per hertz ratio.
For example, if the drive is rated for 460 VAC output and the Maximum Voltage
Frequency is set to 60Hz, the drive will maintain a constant ratio of 7.66 v/Hz. The
setting value must be greater than or equal to the middle freq. setting (Pr.1-03).

1 - 02

Settings d 2.0 to d 255V Unit: 0.1V

ax. Output Voltage (Vmax)

actory Setting: d 220



This parameter determines the Maximum Output Voltage of the AC drive. The
Maximum Output Voltage setting must be smaller than or equal to the rated voltage of
the motor as indicated on the motor nameplate. The setting value must be greater
than or equal to the Mid-Point Voltage (Pr.1-04).

1 - 03

Settings d 1.0 to d 400Hz Unit: 0.1Hz

id-Point Frequency (Fmid)

This parameter sets the Mid-Point Frequency of V/F curve. With this setting, the V/F ratio



between Minimum Frequency and Mid-Point frequency can be determined. This
parameter must be greater than or equal to Minimum Output Frequency (Pr.1-05) and
equal to or less than Maximum Voltage Frequency (Pr.1-01).

Factory Setting: d 1.0

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-5

M

M

M

Voltag e

Pr.1-02

Pr.1-04

Pr.1-060Pr.1-03

Pr.1-05

Pr.1-00

Pr.1-01

Freq.

Standard V/F Curve

U

1 - 04

Settings d 2.0 to d 255V Unit: 0.1V

id-Point Voltage (Vmid)

Factory Setting: d12.0

The parameter sets the Mid-Point Voltage of any V/F curve. With this setting, the V/F



ratio between Minimum Frequency and Mid-Point Frequency can be determined. This
parameter must be equal to or greater than Minimum Output Voltage (Pr.1-06) and equal
to or less than Maximum Output Voltage (Pr.1-02).

1 - 05

Settings d 1.0 to d 60.0Hz Unit: 0.1Hz

inimum Output Frequency (Fmin) Factory Setting: d 1.0

This parameter sets the Minimum Output Frequency of the AC drive. This parameter



must be equal to or less than Mid-Point Frequency (Pr.1-03).

1 - 06

Settings d 2.0 to d 255V Unit: 0.1V

inimum Output Voltage (Vmin)

Factory Setting: d12.0

This parameter sets Minimum Output Voltage of the AC drive. This parameter must



be equal to or less than Mid-Point Voltage (Pr.1-04).

1 - 07

Settings d 1 to d110% Unit: 1%

pper Bound of Output Frequency

Factory Setting: d 100

This parameter must be equal to or greater than the Lower Bound of Output Frequency



(Pr.1-08). The Maximum Output Frequency (Pr.1-00) is regarded as 100%.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-6

L

F

A
D
A
D

1 - 08

Settings d 0 to d100% Unit: 1%



The Upper/Lower Bound is to prevent operation error and machine damage.

ower Bound of Output Frequency

actory Setting: d 0



If the Upper Bound of Output Frequency is 50Hz and the Maximum Output Frequency
is 60Hz, the Maximum Output Frequency will be limited to 50 Hz.



If the Lower Bound of Output Frequency is 10Hz, and the Minimum Output Frequency



Pr.1-05is set at 1.0Hz, then any Command Frequency between 1-10Hz will

generate a 10Hz output from the drive.



This parameter must be equal to or less than the Upper Bound of Output Frequency
(Pr.1-07).

1 - 09
1 - 10
1 - 11
1 - 12

Settings d 0.1 to d 600Sec Unit: 0.1Sec

cceleration Time 1 (Taccel 1) Factory Setting : d10.0

eceleration Time 1 (Tdecel 1)

cceleration Time 2 (Taccel 2)

eceleration Time 2 (Tdecel 2)

Factory Setting : d10.0
Factory Setting : d10.0
Factory Setting : d10.0

These parameters can be set during operation.



Pr.1-09. This parameter is used to determine the time required for the AC drive to ramp
from 0 Hz to its Maximum Output Frequency (Pr.1-00). The rate is linear unless
S-Curve is “Enabled.”



Pr.1-10. This parameter is used to determine the time required for the AC drive to
decelerate from the Maximum Output Frequency (Pr.1-00) down to 0 Hz. The rate is
linear unless S-Curve is “Enabled.”



The accel/decel time 2 determines the time for the AC drive to accel/decel from 0Hz to
Maximum Output Frequency (Pr.1-00) (accel/decel time 1 is the default). A
Multi-Function Input terminals must be programmed to select accel/decel time 2 and
the terminals must be closed to select accel/decel time 2. See Pr.4-04 to Pr.4-08.



In the diagram shown below, the accel/decel time of the AC drive is the time between 0
Hz to Maximum Output Frequency (Pr.1-00). Suppose the Maximum Output Frequency
is 60 Hz, start-up frequency (Pr.1-05) is 1.0 Hz, and accel/decel time is 10 seconds.
The actual time for the AC drive to accelerate from start-up to 60 Hz is 9.83 seconds
and the deceleration time is also 9.83 seconds.

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5

VFD-L Series

5-7

J

J

J

F

Time

Frequency

Max.

Output

Freq.

Pr.1-00

Actual Accel/D ece l Tim e=

Accel/Decel Tim e x(Master Freq.-Min.Output Freq.)

Max. Output Freq.

1 - 13

Settings d 0.1 to d 600Sec Unit: 0.1Sec

og Accel Time

Factory Setting: d 10.0

This parameter can be set during operation.

1 - 14

Settings d 0.1 to d 600Sec Unit: 0.1Sec

og Decel Time

Factory Setting: d 10.0

This parameter can be set during operation.

1 - 15

Settings d 1.0 to d 400Hz Unit: 0.1Hz

og Frequency

actory Setting : d 6.0

This parameter can be set during operation.

The JOG function can be selected using Multi-function Input terminals (Pr.4-04 to



Pr.4-08) if programmed for Jog (d10). When the Jog terminal is “closed”, the AC drive
will accelerate from Minimum Output Frequency (Pr.1-05) to Jog Frequency (Pr.1-14).
When the Jog terminal “open”, the AC drive will decelerate from Jog Frequency to zero.
The accel/decel time is decided by the Jog accel/decel time (Pr.1-13). During operation,
the AC drive can not perform Jog command. And during Jog operation, other operation
commands can not be accepted, except command of RUN/STOP key on the digital
keypad.

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5-8

Frequency

Max.

Output

freq.

Pr.1-00

Jog

Freq.

Pr.1-14

Accel

Tim e

Pr.1-13

Decel

Tim e

Pr.1-13

Tim e

Jog operation

comm and

ON

OFF

A

F

A

D

F

VFD-L Series

1 - 16

Settings d 0 Linear acceleration / deceleration.

uto-Acceleration / Deceleration

actory Setting : d 0

d 1 Auto acceleration, linear Deceleration.
d 2 Linear acceleration, auto Deceleration.
d 3 Auto acceleration / deceleration

d 4 Linear acceleration/deceleration, and stall prevention

d 5 Auto acceleration, linear deceleration, and stall prevention



If the auto accel/decel is selected, the AC drive will accel/ decel in the fastest and
smoothest means possible by automatically adjusting the time of accel/decel.

1 - 17

Settings d 0 to d 7

cceleration S-Curve

1 - 18

Settings d 0 to d 7

eceleration S-Curve

during deceleration.

during deceleration

Factory Setting: d 0

actory Setting: d 0



These two parameters allow you to configure whether the acceleration and/or
deceleration ramps are linear or S-shaped. The S-curve is enabled when set at
d1-d7. Setting d1 offers the quickest S-curve and d7 offers the longest and
smoothest S-curve. The AC drive will not follow the accel/decel time in Pr.1-09 to
Pr.1-12. To Disable the S-curve, set Pr.1-16 and Pr.1-17 to d0.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-9

Freq.

Accel/Decel characteristics

(1), (2) Disa blin g S curv e

(3), (4) Enab lin g S c ur v e



From the diagram shown below, the original setting accel/decel time will be for
reference when the function of the S-curve is enabled. The actual accel/decel time
will be determined based on the S-curve selected (d1 to d7).

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-10

S

J1

Voltage signal input(0-10V)

Current signal input(4-20mA)

S

F

S

F

Group 2: Operation Method Parameters

2 – 00

Settings d 0 Master Frequency input determined by digital keypad.

ource of Frequency Command

Factory Setting: d 0

d 1 Master Frequency determined by analog signal DC 0V-10V

(external terminal AVI).

d 2 Master Frequency determined by analog signal DC 4mA -

20mA (external terminal AVI).

d 3 Master Frequency determined by Potentiometer on the

digital keypad.

d 4 Master Frequency operated by RS-485 serial

communication interface.

This parameter sets the Frequency Command Source of the AC drive.



If the Frequency Command Source is external (DC 0 to +10V or 4 to 20mA), please
select DC voltage signal or current signal.

2 - 01

Settings d 0 Controlled by the keypad

ource of Operation Command

d 1 Controlled by the external terminals, keypad STOP

enabled.

d 2 Controlled by the external terminals, keypad STOP

disabled.

d 3 Controlled by the RS-485 communication interface,

keypad STOP enabled.

d 4 Controlled by the RS-485 communication interface,

keypad STOP disabled.

When the AC drive is controlled by an external source, please refer to parameter group 4



for detailed explanations on related parameter settings.

2 - 02

Settings d 0 Ramp stop

top Method

actory Setting: d 0

actory Setting: d 0

d 1 Coast stop

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5

VFD-L Series

5-11

Hz

Freq.

Motor

Speed

Stops according

to deceleration

tim e

Tim e

Hz

Freq.

Motor

Speed

Free running

to stop

Tim e

Operation

command

ONONOFF

OFF

Ramp

Coast

P

F

The parameter determines how the motor is stopped when the AC drive receives a



valid stop command.

1. Ramp: the AC drive decelerates the motor to Minimum Output Frequency (Pr.1-05) and
then stops according to the deceleration time set in Pr.1-10 or Pr.1-12.

2. Coast: the AC drive stops output instantly upon command, and the motor free runs until
it comes to a complete stop.

Note: The motor stop method is usually determined by the characteristics of the motor load

and frequency of stops.

2 - 03

Settings d 03 fc= 3KHz Unit: 1KHz

WM Carrier Frequency Selections

This parameter can set the carrier frequency of PWM output.

Carrier

Frequency

3KHz

10KHz

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d 04 fc= 4KHz
d 05 fc= 5KHz

to

d 10 fc= 10KHz

Acoustic Noise

Significant

Minimal

Electromagnetic

Noise, Leakage

Current

Minimal

Significant

actory Setting: d 10

Heat

Dissipation

Minimal

Significant

5-12

R

L

L

VFD-L Series

From the above table, we see that the carrier frequency of PWM output has a significant



influence on the electromagnetic noise, heat dissipation of the AC drive, and the acoustic
noise to the motor.

2 - 04

Settings d 0 enable Reverse operation

everse Operation Inhibit

Factory Setting: d 0

d 1 disable Reverse operation
d 2 disable Forward operation

The parameter determines whether the AC drive can operate in the reverse or forward



directions.

2 - 05

Settings d 0 Upon the loss of ACI, the drive will default to an output

oss of ACI Input

Factory Setting: d 0

frequency of 0 Hz.

d 1 Upon the loss of ACI, the drive will stop and display error

message “EF”.

d 2 Upon the loss of ACI, the drive will continue to run at the

last known ACI input.

This parameter is only effective when the Source of Frequency is commanded by a 4 to



20 mA signal. The ACI input is considered lost when the ACI signal falls below 2 mA.

2 - 06

Settings d 0 enable

ine Start Lockout

Factory Setting: d 0

d 1 disable

When enabled, the AC drive wil not start when powered up with run commands applied.



To start in Line Start Lockout mode, the AC drive must see the run command go from
stop to run after power up. When Line Start Lockout is disable (also known as
Auto-Start), the drive will start when powered-up with run commands applied.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

5-13

D

F

Desired Freq.

Detection

ran ge

-2H z

Detection range

+-4Hz

Detection range

+

-

2Hz

Tim e

Freq.

Max. Output

Freq.

Pr.3-02

ONONOFF

OFF

OFF

OFF

Preset Freq.

Atta ine d

indication

Pr.3-03

Desired Freq.

Atta ine d

Ind ica tion

Pr.3-03

Desired Freq. Attained & P reset Freq. Attained

T

F

P

F

Group 3: Output Function Parameters

3 - 00

Settings d 1.0 to d 400 Hz Unit: 0.1Hz

esired Frequency Attained

actory Setting: d 1.0

If a Multi-function output terminal is set to function as Desired Frequency Attained



(Pr.3-03=d9), then the output will be activated when the programmed frequency is
attained.

VFD-L Series

3 – 01

Settings d 0 to d 999

erminal Count Value

actory Setting: d 0

The parameter determines the value of the internal counter. The internal counter can be



triggered by the external terminal (Pr.4-4 to Pr.4-6, d18). Upon completion of counting,
the specified output terminal will be activated. (Pr.3-03=d14).

3 – 02

Settings d 0 to d 999

reliminary Count Value

actory Setting: d 0

When the counter value is c oun ted up f rom “1” t o the s ettin g valu e of this pa ramet er, the



corresponding multi-function output terminal will be closed, when sets d15 as desired
value attained setting. The application can be that closing the multi-function output
terminal makes the AC drive operate at low speed until stop before the counting value is
going to be attained.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-14

Desired Counter Value

Atta in ed o u tpu t

(Pr. 3-02=d3)

Preset Counter Value

Atta in ed o u tpu t

(Pr.3-01=d5)

2ms

2ms

Display

(Pr.0-04=d1)

TRG

Counter Trigger Signal

M u lti-fun c tio n Inp ut Te rm in a l

The width of trigger signal

should not be less than

2ms(<250 Hz)

NO T E : To display cou nter value set Pr.0-04=1

M
(

F

S

g

D
M

d

O
T

P

The timing diagram is shown below:

3 – 03

ulti-function

relay output)

actory Setting: d 8

Settings d 0 to d 16

Function Table List:

ettin

d 0 Not used d 9
d 1 AC Drive Operational d 10 PLC Program Running

d 2

aximum Output Frequency Attaine
d 3 Zero speed d 12 PLC Program Completed
d 4

ver-Torque detection d 13 PLC Operation Paused

d 5 Base-Block (B.B.) Indication
d 6 Low-Voltage Indication

Function Setting

d 11 PLC Program Step Completed

d 14
d 15

Function

esired Frequency Attained

erminal Count Value Attained

reliminary Counter Value Attained
d 7 AC Drive Operation Mode d 16 Ready State Indicator
d 8 Fault Indication

Function Explanations:



d 0 Not Used.
d 1 AC drive operational:

output from the drive.

d 2 Maximum Output Frequency Attained:

attains Maximum Output Frequency.

the output of output terminal will be activated when there is an

the output will be activated when the AC drive

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-15

d 3 Zero speed:

the output will be activated when Command Frequency is lower than the

Minimum Output Frequency.

d 4 Over-Torque Detection:

the output will be activated as long as the over-torque is

detected. Pr.6-04 determines the Over-Torque detection level.

d 5 Base-Block (B.B.) Indication:

the output will be activated when the output of the AC

drive is shut off by external Baseblock.

d 6 Low Voltage Indication:
d 7 AC Drive Operation Mode:

the output will be activated when low voltage is detected.

the output will be activated when the operation of the AC

drive is controlled by External Control Terminals.

d 8 Fault Indication:

the output will be activated when faults occur (oc, ov, oH, oL, oL1, EF,

cF3, HPF, ocA, ocd, ocn, GF).

d 9 Desired Frequency Attained:

the output will be activated when the desired frequency

(Pr.3-02)is attained.

d10 PLC Program Running:

the output will be activated when the PLC program is running.

d11 PLC Program Step Completed:

the output will be activated for 0.5 sec. when each

multi-step speed is attained.

d12 PLC Program completed:

the output will be activated for 0.5 sec. when the PLC

program cycle has completed.

d13 PLC Program Operation Paused:

the output will be activated when PLC operation is

paused.

d14 Terminal Count Value Attained:

counter reaches Terminal Count Value.

d15 Preliminary Count Value Attained:
d16 Ready State Indicator

counter reaches Preliminary Count Value.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5-16

P

F

P

F

0

P

F

0

D

F

VFD-L Series

Group 4: Input Function Parameters

4 - 00

otentiometer Bias Frequency

actory Setting: d0.0

Settings d 0.0 to d 350Hz Unit: 0.1Hz
This parameter can be set during the operation.

4 - 01

otentiometer Bias Polarity

Settings d 0 Positive bias

actory Setting: d

d 1 Negative bias

This parameter can be set during the operation.

4 - 02

Settings d 1 to d 200% Unit: 1%

otentiometer Frequency Gain

actory Setting: d 10

This parameter can be set during the operation.

4 - 03

irection setting for negative bias

actory Setting: d 0

Settings d 0 Only receive positive bias
d 1 Negative bias with direction command. Positive bias means

forward running and negative bias means reverse running.

d 2 Negative bias without direction command. Direction is

controlled by keypad or external frequency command.

Pr.4-00 to Pr.4-03 are used when the source of frequency command is the analog



signal (0 to +10V DC or 4 to 20 mA DC). Refer to the following examples.

Example 1:

The following is the most common method. Set parameter 2-00 to d1 (0 to +10V signal),
d2 (4 to 20mA current signal), or d3 (keypad potentiometer).

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-17

Hz0V10V300

60

Po te n tiome ter Sc a le

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

4m A

5V

12m A

10V

20m A

Fa c to ry Se ttin gs

Pr.1-00= 60 H z--Max. output F req.

Pr.4-00= 0Hz --Potentiom eter bias freq .

Pr.4-01= 0 -- bias polarity

Pr.4-02= 10 0% -- pot. freq. ga in

Pr.4-03= 0 -- po t. R EV motion ena ble

30Hz

Hz0V10V4010

60

Po te n tiome ter Sc a le

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

4m A

5V

12m A

10V

20m A

Parameter Settings

Pr.1-00= 60 H z--Max. output Freq.

Pr.4-00= 10 H z--Potentiometer b ias freq.

Pr.4-01= 0 -- bias polarity

Pr.4-02= 10 0% -- pot. freq. g ain

Pr.4-03= 0 -- po t. R EV motion ena ble

10Hz

Bia s

Adjustment

It's 60 Hz

w ith in th is

range.

Hz0V10V3510

60

Potentiometer Scale

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

4m A

5V

12m A

10V

20m A

Pa ra m e te r Se tting s

Pr.1-00= 60 H z--Max. output Freq.

Pr.4-00= 10 H z--Potentiometer bias freq.

Pr.4-01= 0 -- bias polarity

Pr.4-02= 83 % -- pot. freq. gain

Pr.4 -0 3 =0 -- po t. REV motion en able

10Hz

Bia s

Adjustment

Calculation of gain

Pr.4-02= (1-

Pr.4-00

Pr.1-00

)x100%

Example 2:

In this example with the potentiometer set to 0V the Output Frequency is 10 Hz. The
mid-point of the potentiometer becomes 40 Hz. Once the Maximum Output Frequency is
reached any further increase of the potentiometer will not increase output frequen c y.

Example 3:

The example also shows the popular method. The whole scale of the potentiometer can be
used as desired. In addition to signals of 0 to 10V and 4 to 20mA, the popular voltage signals
also include signals of 0 to 5V, 20 to 4mA or that under 10V. Regarding the setting, please
refer to the following examples.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-18

Hz0V5V300

60

Po te n tiome ter Sc a le

P ara me t e r Set t in gs

Pr.1-00 =60 H z--Max. output Freq.

Pr.4-00=0Hz--Potentiometer bias freq.

Pr.4-01 =0 -- bias polarity

Pr.4 -0 2=2 00% -- p o t. freq. gain

Pr.4 -03=0 -- po t. R E V m otion enable

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

5V

Calculation of gain

Pr.4-02= (

10V5V)x100%

30Hz

Gain adjustment

Hz0V10V240

54

Po te n tiome ter Sc a le

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

10V

Parameter Settings

Pr.1-00= 60 H z--Max. output Freq.

Pr.4-00= 6Hz --Potentiom eter bias freq.

Pr.4-01= 1 -- bias polarity

Pr.4-02= 10 0% -- pot. freq. gain

Pr.4-03= 0 -- pot. Rev. motion enab le

1V

54Hz

It's 0Hz

within

this

range.

Hz0V10V270

60

Poten tio mete r Sc a le

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

10V

P ara me t e r Set t in gs

Pr.1-00 =60 H z--Max. output Freq.

Pr.4-00 =6H z--Potentiometer bias freq.

Pr.4-01 = 1 -- bias po larity

Pr.4 -0 2=110% -- pot. freq. gain

Pr.4-03 =0 -- pot. Rev. motion enable

1V

It's 0Hz

within

this

range.

Bias adjustme nt

Calculation of gain

Pr.4-03 =(1+

Pr.4-00

Pr.1-00

)x100%

Example 4:

This example shows a potentiometer range of 0 to 5 Volts.

Example 5:

In this example a 1 volt negative bias is used. In a noise environment, it is advantageous to
use negative bias to provide a noise margin (1V in this example).

Example 6:

In this example, a negative bias is used to provide a noise margin. Also a potentiometer
frequency gain is used to allow the Maximum Output Frequency to be reached.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-19

Hz0V10V060

Potentiometer Scale

Max.

Output

Freq.

Pr.1-00

Pa ra m e te r Se tting s

Pr.1-00= 60 H z--Max. output Freq.

Pr.4-00= 30 H z--Potentiometer bias freq.

Pr.4-01= 1 -- bias polarity

Pr.4-02= 20 0% -- pot. freq. ga in

Pr.4 -0 3 =1 -- po t. REV motion en able

60Hz

30Hz

0Hz0V5V

10V

30Hz

60Hz

REV

FW D

REV.

FW D.

60

Hz

0V

4mA

10V

20mA

30060

Po te n tiome ter Sc a le

Max.

Output

Freq.

60Hz

Pr.1-00

0Hz

0V

4m A

10V

20m A

Parameter Settings

Pr.1-00= 60 H z--Max. output Freq.

Pr.4-00= 60 H z--Potentiometer bias fre q.

Pr.4-01= 1 -- bias polarity

Pr.4-02= 10 0% -- pot. freq. gain

Pr.4-03= 2

anti-slope

M

F

M

F
M

F

Example 7:

In this example, the potentiometer is programmed to run a motor is both forward and reverse
direction. A motor will be idle when the potentiometer position is at mid-point of its scale.
Using Pr.4-0 3 will disable the external FWD and REV controls.

Example 8:

In this example, the option of anti-slope is shown. Anti-slope is used in an application where
control of pressure, temperature, or flow is needed. Under a high pressure or flow situation,
a sensor will generate a large signal such as 20 mA or 10V . With anti-slope enable, the
large signal will slow or stop the AC drive

4 - 04

Settings d 0 to d 20

ulti-function Input Termin al (M0, M1)

actory Setting: d 1

4 – 05
4 – 06

Settings d0, d 4 to d 20

ulti-function Input Terminal (M2)
ulti-function Input Terminal (M3)

actory Setting: d 6
actory Setting: d 7

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-20

e

(

F
S
M
M

E
(
M
M

(
3

(
E

D
E

R
E

P
M

C
M

C
J

S
A

FWD/STOP

REV/STOP

M 0 "O pe n": Stop , "Close ": FW D R un

M 1 "O pe n": Sto p, "Clos e":R E V R u n

GND

RUN/STOP

REV/FWD

M 0 "O pe n": Stop , "Close ": Run

M 1 "O pe n": FW D , "Clos e ":R EV

GND

Parameters & Functions table:

Valu

d 0
d 1
d 2

d 3
d 4

d 5
d 6
d 7
d 8
d 9

d10

input not used) d11

0: FWD / STOP
1: REV / STOP
0: RUN / STOP
1: FWD / REV

-Wire Operation Control mode

M0,M1,M2)

xternal Fault ( Normally Open) d15
xternal Fault ( Normally Closed )
xternal Reset d17

ulti-Step Speed Command 1 d18
ulti-Step Speed Command 2 d19

og operation d20

ccel/Decel Speed Inhibit

Explanations:
d0 Parameter Disable:

Function Value

d12
d13

d14 Increase Master Frequency

d16

Function

irst or Second Accel/Decel Time
election
xternal Base Block (N.O.)

Normally Open Contact Input)

External Base Block (N.C.)

Normally Close Contact Input)

ecrease Master Frequency
un PLC Program

ause PLC Program

ounter Trigger Signal
ounter Reset

elect ACI/deselect AVI

Enter value (d0) to disable any Multi-Function Input Terminal: M0, M1 (Pr.4-04), M2
(Pr.4-05) or M3 (Pr.4-06).

Note:The purpose of this function is to provide isolation for unused Multi-Function Input

Terminals. Any unused terminals should be programmed to d0 to insure they have
no effect on drive operati on.

d1:Two wire operation:

d2: Two wire operation:

Restricted to Pr.4-04 and external terminals M0, M1.

Restrict to Pr. 4-04 and external terminals M0, M1.

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5

5-21

Note: Multi-function Input Terminal M0 does not have its own parameter designation. M0

STOP

RUN

RUN/FWD

M0 Ru n com mand, Runs whe n "close"

M2 Stop com mand, stops w h en "Open "

M1 RE V /FWD R un selection

"Open": FWD Ru n

"C los e": RE V R un

GND

GND

E.F.(N .O.)

setting by d4

E.F(N.C.)

setting by d5

Mx "Close": O pe ration availa ble.

Mx "Open":Operation available.

GND

RESET

setting by d6

Mx "Close": O peration available

must be used in conjunction with M1 to operate two and three wire control.

VFD-L Series

d3: Three Wire Control:

Restricted to Pr.4-04 control terminals M0, M1, M2.

Note: When value d3 is selected for Pr. 4-04, this will over ride any value entered in

Pr.4-05, since Pr.4-05 must be used for three w ire control as show n abov e.

d4, d5 External Faults:

Parameter values d4, d5 programs Multi-Function Input Terminals: M1 (Pr.4-04), M2
(Pr.4-05) or M3 (Pr.4-06) to be External Fault (E.F.) inputs.

When an External Fault input signal is received, the AC drive will stop all output and
display

³

E.F.´ on Digital Keypad, the motor will free run. Normal operation can resume

after the External Fault is cleared and the AC drive is reset.

d6 External Reset:

Parameter value d6 programs a Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) to be an External Reset.

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VFD-L Series

5-22

GND

D7 Multi-step 1

D8 Multi-step 2

M x " Close": Operation availa ble

M x " Close": Operation availa ble

Freq.

Step 1

Step 2

Step 3

Tim e

ONONON

ON

OFF

ON

Operation

Command

Mx2-GND

Mx1-GND

Pr.5-00

Pr.5-01

Pr.5-02

Ma ster Freq.

GND

Mx "Close": O peration available

d9 jog operation

command

Note: the External Reset has the same function as the MODE/RESET key on the Digital

keypad. After external fault such as O.H., O.C. and O.V. are clear, this input can be
used to reset the drive.

d7, d8 Multi-Step Speed Command:

Parameter values d7, d8 programs any two of the following Multi-Function Input Terminals:
M1 (Pr.4-04), M2 (Pr.4-05), or M3 (Pr.4-06) for multi-step speed command function.

These three inputs select the multi-step speeds defined by Pr.5-00 to Pr.5-02 as shown in
the following diagram. Pr.5-05 to Pr.5-8 can also control output timing by programming
the AC drive

¶

s internal PLC function.

d9 Jog Operation Control:

Parameter value d9 programs Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) for Jog control.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-23

Freque ncy

Master Frequency

Acce l inhibit

Acce l inhibit

Actual op eration frequenc y

Decel

inhibit

Decel

inhibit

Tim e

Mx-GND

Operation

command

ONONONONON

OFF

GND

Mx "Close": 2 nd Accel/D ece l

Mx set d11

"Open": 1st A ccel/Decel

Frequenc y

Master

Frequenc y

Pr.

1-09

1st

Accel/

Decel

2nd

Accel/

Decel

1st

Accel

Pr.

1-10

Pr.

1-12

Pr.

1-12

2nd

Decel

Tim e

Mx-GND

operation

command

ONONONONON

OFF

Pr.

1-11

Pr.

1-09

Note: Jog operation programmed by d9 can only be initiated while the motor is stopped.

(Refer to Pr.1-13, Pr.1-14.)

d10 Accel/Decel Speed Inhibit:

Parameter value d10 programs Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) for Accel/Decel Inhibit. When the command is received, acceleration
and deceleration is stopped and the AC drive maintains a constant speed.

d11 First or Second Accel./Decel. Time Selection:

Parameter value d11 programs a Multi-Function Input Terminal: M1 (Pr.4-04), M2
(Pr.4-05) or M3 (Pr.4-06) to control selection of First or Second Accel/Decel time. (Refer
to Pr.1-09 to Pr.1-12.)

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VFD-L Series

5-24

GND

B.B.(N.O.)

setting by d12

B.B.(N.C.)

setting by d13

M x " Close": Operation availa ble.

Mx "Open ":Ope ration a vailable.

External

base-block

signal

Output

frequency

Output

voltage

Capacitor

discharge

A llow ab le max. p o we r lo s s time

Sp e e d se a rch sta rts with the

refe rence v alue

Low voltage

Pr.8-06

Min. base-block time

Low voltage

Spee d search operatio n

Pr.8-04=d1

Spee d synchronization

detection

GND

setting by d14

setting by d15

M x "C los e ": Freq . will inc r ea s e

b y one uni t.

Mx "Open":Freq. will decrease

b y o ne u ni t .

UP

DOWN

d12, d13 External Base Block:

Parameter values d12, d13 program Multi-Function Input Terminals: M1 (Pr.4-04), M2
(Pr.4-05) or M3 (Pr.4-06) for external Base Block control. Value d12 is for normally open
(N.O.) input, and value d13 is for a normally closed (N.C.) input.

Note:

When a Base-Block signal is received , the AC drive will sto p all output and the motor
will free run. When base b lock contro l is deactivate d, th e AC drive will sta rt its speed
search function and synchronize with the motor speed, and then accelerate to
Master Frequency.

d14, d15 Increase/Decrease Master Frequency:

Parameter values d14, d15 program the Multi-Function Input Terminals: M1 (Pr.4-04), M2
(Pr.4-05) or M3 (Pr.4-06) to incrementally increase/ decrease the Master Frequency each
time an input is received.

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5

5-25

d16, d17 PLC Function Control:

GND

setting by d16

setting by d17

Mx "Close": Run PLC.

Mx "Open":Pause PLC.

PLC operation

GND

D1 8 c ou n te r trig g er

signal input.

Mx counter value in crease by

1 when closed.

Trigg er

2ms

2ms

Ind ic atio n va lue

(Pr.0-04=d1 )

Counter trigger signal

Multi-function input terminal

Signal output with Pr.3-02

co u nter va lu e is attain e d.

(Pr.3-02=d3 )

(Pr.3-03)

Signal output with Pr.3-01

co u nter va lu e is attain e d.

(Pr.3-01=d5 )

(Pr.3-03)

The trigger timing

can't be less than

2ms .(<250H z)

Parameter value d16 programs Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) to enable the AC drive internal PLC program. Parameter value d17
programs an input terminal to pause the PLC program.

VFD-L Series

Note: Pr.5-00 to Pr.5-08 define the PLC program.

d18 Counter Trigger:

Parameter value d18 programs Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) to increase the AC drive¶s internal counter. W hen an input is received,
the counter is increased by 1.

Note:The Counter Trigger input can be connected to an external Pulse Signal Generator
to count a processing step or unit of material. See the diagram below.

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VFD-L Series

5-26

GND

d19 r es et th e coun t er

value.

Mx "close": reset counter.

Rese t counter

d19 Counter Reset:

Parameter value d19 programs Multi-Function Input Terminal: M1 (Pr.4-04), M2 (Pr.4-05)
or M3 (Pr.4-06) to reset the counter.

d20 Select ACI / Deselect AVI:

Parameter value d20 allows the user to select the input type ACI or AVI via an external
switch. AVI is selected when the contact is open and ACI is selected when the contact is
closed. Please note: the use of this feature will override Pr.2-00 programming and the
jumper of the front of the drive must be moved to the correct location either across the
AVI or ACI pin head.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

5-27

1

F
2

F
3

F

P

Group 5: Multi-step Speed, Process Logic Control Parameters

5 - 00
5 - 01
5 - 02

Settings d 0.0 to d 400 Hz Unit: 0.1Hz

st Step Speed Frequency
nd Step Speed Frequency
rd Step Speed Frequency

actory Setting: d 0.0
actory Setting: d 0.0
actory Setting: d 0.0

This parameter can be set during operation.



The Multi-Function Input Terminals (refer to Pr.4-04 to 4-06) are used to select one of

the AC drive Multi-Step speeds. The speeds (frequencies) are determined by Pr.5-00
to 5-02 shown above.

5 – 03

Settings d 0 Disable PLC operation

LC Mode

Factory Setting: d 0

d 1 Execute one program cycle

VFD-L Series

d 2 Continuously execute program cycles
d 3 Execute one program cycle step by step

d 4 Continuously execute program cycles step by step

This parameter selects the mode of PLC operation for the AC drive. The PLC program



can be used in lieu of any External Controls, Relays or Switches. The AC drive will
change speeds and directions according to the user’s desired programming.

Example 1 (Pr.5-03 = d1): Execute one cycle of the PLC program. Its relative parameter
settings are:

1. Pr.5-00 to 5-02: 1

to 3

step speedsets the frequency of each step speed

st

rd

2. Pr.4-04 to 4-06: Multi-Function Input Terminalsset one multi-function terminal as d16­PLC auto-operation.

3. Pr.3-03: Multi-Function Output (set the relay as d10-PLC operation indication, d11-one
cycle in PLC auto mode or d12-PLC operation fulfillment attainment).

4. Pr.5-03: PLC mode.

5. Pr.5-04: Direction of operation for Master Frequency and 1

6. Pr.5-05 to 5-08: operation time setting of Master Frequency and 1st to 3rd step speed.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

st

to 3rd step speed.

VFD-L Series

5-28

Frequency

40Hz

30Hz

20Hz

15Hz

10Hz

0Hz

5-05

5-06

5-07

5-08

Pr.5-00

Pr.5-01

Pr.5-02

Master

Freq.

Program operation

command

Program operation

output indication

Wh en 3-03=1 0

Program step

complete

Wh en 3-03=11

Program operation

completed

Wh en 3-03=1 2

Mas ter freq.=5Hz

5-00=10 Hz

5-01=20

Hz

5-02=40 Hz

4-06=d16

5-03=d1

5-04=d0

5-05=10 Sec

5-06=10 Sec

5-07=12 Sec

5-08

=15 Sec

5Hz

Time

(Se c)

Frequency

40Hz

30Hz

20Hz

15Hz

10Hz

0Hz

5-05

5-07

5-08

5-05

5-00

5-01

5-02

Program step

complete

Wh en 3-03=11

Program operation

completed

Wh en 3-03=1 2

5Hz

Mas ter freq.=5Hz

5-00=10 Hz

5-01=20

Hz

5-02=40 Hz

4-06=16

3-03=12

5-03=d2

5-04=d0

5-05=10 Sec

5-06=10

5-07=12

5-08

Sec

Sec

=15 Sec

5-06

Time

(Se c)

5-06

5-00

5-01

Note: The above diagram shows one complete PLC cycle. To restart the cycle, turn the PLC

program off and then back on.

Example 2 (Pr.5-03 = d2): Continuously executes program cycles

The diagram below shows the PLC program stepping through each speed and the
automatically starting again. To stop the PLC program, one must either pause the
program or turn it off (Refer to Pr.4-05 to 4-06 value d16 and d17).

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-29

Frequency

40Hz

30Hz

20Hz

15Hz

10Hz

0Hz

Program step

complete

Wh en 3-03=11

Program operation

completed

Wh en 3-03=1 2

5Hz

5-05

Mas ter freq.=5Hz

5-00=10 Hz

5-01=20

Hz

5-02=40 Hz

4-06=16

5-03=d3

5-04=d0

5-05=10

5-06=10

5-07=12

5-08

Sec

Sec

Sec

=15 Sec

Time

(Se c)

Frequency

40Hz

20Hz

15Hz

10Hz

0Hz

Time

(Se c)

FWD

REV

t

5-05

Mas ter freq.=5Hz

5-00=10 Hz

5-01=20

Hz

5-02=40 Hz

4-06=17

3-03=12

5-03=d4

5-04=d0

5-05=10

5-06=10

5-07=12

5-08

Sec

Sec

Sec

=15 Sec

t

5-05

Example 3 (Pr. 5-03 = d3) Execute one cycle step by step:

The example shows how the PLC can perform one cycle at a time, within a complete
cycle. Each step will use the accel/decel times in Pr.1-09 to Pr.1-12. It should be
noticed that the time each step spends at its intended frequency is diminished, due to the
time spent during accel/decel.

Example 4 (Pr. 5-03 =d 4) Continuously execute PLC cycles step by step:

In this explanation, the PLC program runs continuously step by step. Also shown are
examples of steps in the Reverse direction.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-30

P

123

Weights

Bit

0=Forw ard

1=R everse

Direction of 1st Pr.5-00

speed for

Direction of 2nd Pr.5-01

speed for

Direction of 3rd Pr.5-02

speed for

0

Director of Master F requenc y during PLC

123

Weights

Bit

0=Forw ard

1=R everse

Direction of 1st Pr.5-00 =FW D

speed for

Direction of 2nd Pr.5-01 =REV

speed for

Direction of 3rd Pr.5-02 = F

speed for

00100

Direction

WD

WD

5 - 04

LC Forward/Reverse Motion

Settings d 0 to d 15



This parameter controls the direction of motion for the Multi-Step Speed Pr.5-00 to
Pr.5-02 and the Master Frequency. The original direction of Master Frequency will
become invalid. The equivalent 4-bit number is used to program the forward/reverse
motion for each of the 4 speed steps (including Master Frequency). The binary notation
for the 4-bit number must be translated into decimal notation and then be entered.

Factory Setting: d 0

The setting value = bit3 x 23+bit2 x 22+bit1x 21+bit0 x 20
= 0 x 23+1 x 22+0 x 21+0 x 20
= 0+4+0+0
= 4 (Set Pr.5-04 to d4)

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5

VFD-L Series

5-31

T
T
T
T

5 – 05
5 – 06
5 – 07
5 – 08

Settings d 0 to d 65500 Unit: 1 sec

ime Duration Step 0
ime Duration Step 1
ime Duration Step 2
ime Duration Step 3

Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0

Pr.5-05 to Pr.5-08 correspond to operation time of each multi-step speed defined by



parameters 5-00 to 5-02. The maximum value of these parameters is 65500 sec., and
it’s displayed as d 65.5.

Note: If a parameter is set to “d0” (0 Sec), the corresponding step will be skipped. This is

commonly used to reduce number of program steps

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5-32

O

F

DC bus voltage

time

Over-voltage

detection

leve l

Output

Freq.

time

Over-voltage Stall Prevention

O

VFD-L Series

Group 6: Protection Parameters

6 - 00

Settings d 0 Disable Over-Voltage Prevention

ver-Voltage Prevention Level

d 350 to d 410 Unit: 1 VAC

During deceleration, the motor DC bus voltage may exceed its Maximum Allowable Value



due to motor regeneration. When this function is enabled, the AC drive will stop
decelerating. Maintaining a constant output frequency when it happens. The AC drive will
only resume deceleration when the voltage drops below preset value.

Note:

With a moderate inertial load, the over-voltage during deceleration won’t happen, and the
drive will stop in programmed time. The AC drive will automatically extend the
deceleration time with high inertial loads. If deceleration time is critical for the
application, then dynamic braking resistors should be used.

actory Setting: d 390

6 - 01

ver-Current Prevention Level

Factory Setting: d170

Settings d 0 disable Over-Current Prevention
d 20 to d 200% Unit: 1%

A setting of 100% is equal to the Rated Output Current of the drive.



During acceleration, the AC drive output current may increase abruptly to exceed the



value specified by Pr.6-01 due to rapid acceleration or excessive load on the motor.
When this function is enabled, the AC drive will stop accelerating and maintaining a
constant output frequency. The AC drive will only resume acceleration when the current
drops below the maximum value.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-33

O

F

O

F

C

F

E

6 - 02

Settings d 0 Over-Torque detection disabled.

ver-Torque Detection Mode

actory Setting: d 0

d 1 Over-Torque detection enabled during constant speed

operation (OL2), and operation continues until the
continuous operation limit (Pr.6-04) is reached.

d 2 Over-Torque detection enabled during constant speed

operation, and operation halted after over-torque
detection.

d 3 Over-Torque detection enabled during acceleration, and

operation continues before the Continuous Output Time
Limit (Pr.6-04) is reached.

d 4 Over-Torque detection enabled during acceleration.

Operation halted after over-torque detection

6 - 03

Settings d 30 to d 200% Unit: 1%

ver-Torque Detection Level

actory Setting: d 150



A setting of proportional to the Rated Output Current of the drive.

6 - 04

Settings d 0.1 to d 10.0 sec Unit: 0.1sec

ontinuous Output T ime Limit

actory Setting: d 0.1



This parameter determines the time that AC drive will run after over-torque is detected.
Over-torque detection is based on the following:
If a Multi-Function Output Terminal is set as Over-Torque Detection Indication and the
output current exceeds the Over-Torque Detection Level (Pr.6-04, Factory Setting:
150%), the output will be activated.

6 – 05

Settings d 0 Not used

lectronic Thermal Overload Relay Selection

Factory Setting: d 0

d 1 Act with standard motor
d 2 Act with special motor



This function is used to limit the output power of the AC drive when powering a
“self-cooled motor” at low speed.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

5-34

E

F

12345

60Hz or more

50Hz

10Hz

5Hz

0

20

40

60

80

100

120

140

160

180

200

Op eration

tim e(m in)

Load

fac tor

(% )

P
S
T
F
F
S

6 – 06

Settings d 30 to d 600Sec Unit: 1 Sec

lectronic Thermal Character isti c

actory Setting: d 60

This parameter can be set during operation.



The parameter determines the time required activating the I2t electronic thermal
protection function. The graph below shows I2t curves for 150% output power for 1
minute.

6 – 07
6 – 08
6 – 09
6 – 10

6 – 11

6 – 12



resent Fault Record

econd Most Recent Fault Record
hird Most Recent Fault Record
orth Most Recent Fault Record
ifth Most Recent Fault Record

ixth Most Recent Fault Record

Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0
Factory Setting: d 0

Settings d 0 No fault occurred

d 1 Over-current (oc)
d 2 Over-voltage (ov)
d 3 Overheat (oH)
d 4 Overload (oL)
d 5 Overload1 (oL1)
d 6 External fault (EF)
d 7 CPU failure (cF3)
d 8 Hardware protection failure (HPF)
d 9 Current exceeds 2 times rated current during acce. (ocA)
d 10 Current exceeds 2 times rated current during dece. (ocd)
d 11 Current exceeds 2 times rated current during steady state

operation (ocn)

Pr.6-07 to 6-12 store records of the six most recent faults that had occurred. Use the
MODE/RESET key to reset the drive when the fault no longer exits.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

5-35

M

F

M

F

T

S

F

Group 7: Motor Parameters

7 - 00

Settings d 30 to d 120% Unit: 1%

otor Rated Current

actory Setting: d 85

This parameter can be set during operation.

This parameter will limit the AC drive output current in order to prevent the motor from



overheating.

7 - 01

Settings d 0 to d 90

otor No-load Current

actory Setting: d 50

¦

Unit: 1%

This parameter can be set during operation.

VFD-L Series



The rated current of the AC drive is regarded as 100%. Motor setting of no-load
current will effect the slip compensation. The setting value must be less than motor
rated current setting Pr.7-00

7 - 02

Settings d 0 to d 10 Unit: 1

orque Compens ation

Factory Setting: d 1

This parameter can be set during operation.

This parameter may be set so that the AC drive will increase its voltage outpu t during



start-up to obtain a higher initial starting torque.

7 - 03

Settings d 0.0 to d 10.0 Unit: 0.1

lip Compensation

actory Setting: d 0.0

This parameter can be set during operation.



When powering an asynchronous motor, the load on the AC drive will increase causing an

increase in slip. This parameter may be used to compensate the nominal slip within a
range of 0 to 10. When the output current of the AC drive is greater than the motor
no-load current (Pr.7-01), the AC drive will adjust its output frequency according to this
parameter.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5-36

D

D

F

D

F

S

.0

Operation

Com mand

ON

OFF

01-05

08-03

Output Frequency

Minimum Output

Frequency

Start-Point for

DC Braking

Time during

Stopping

DC Braking Time

during S topp ing

DC Braking Current %

Time

VFD-L Series

Group 8: Special Parameters

8 - 00

Settings d 0 ⇔ d30% Unit: 1%

This parameter determines the level of DC Braking Voltage Level output to the motor



C Braking Voltage Level

Factory Setting: d 0

during start-up and stopping. When setting DC Braking Voltage, the Maximum Output
Voltage (Pr.1-02) is regarded as 100%. It is recommended to start with a low DC Braking
Voltage Level and then increase until proper holding torque has been attained.

8 - 01

Settings d 0.0 to d 60.0 sec Unit: 0.1sec

This parameter determines the duration of time that the DC Braking Current will be



C Braking Time during Start-up

actory Setting: d 0.0

applied to the motor during the AC drive start-up. DC Braking will be applied for the
time set in this parameter until the Minimum Frequency is reached during acceleration.

8 - 02

Settings d 0.0 to d 60.0 sec Unit: 0.1 sec

This parameter determines the duration of time that the DC braking voltage will be



C Braking Time during Stopping

actory Setting: d 0.0

applied to the motor during stopping. If stopping with DC Braking is desired, then
Pr.2-02 must be set to RAMP stop (d 0).

8 - 03

Settings d 0.0 to d 400Hz Unit: 0.1Hz

This parameter determines the frequency when DC Braking will begin during



tart-Point for DC Braking Factory Setting: d 0

deceleration.

NOTE: 1. DC Braking during Start-up is used for loads that may move before AC drive

starts, such as fans and pumps. These loads may also be moving in the wrong
direction. Under such circumstances, DC Braking can be executed to hold the
load in position before applying a forward motion.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

5

VFD-L Series

5-37

M

M

F

B

F

M

F

2. DC Braking during stopping is used to decrease stopping time and also to hold a
stopped load in position. For high inertial loads, a dynamic braking resistor
may be needed for quick decelerations.

8 - 04

Settings d 0 Operation stopped after momentary power loss

omentary Power Loss Operation Selection

Factory Setting: d 0

d 1 Operation continues after momentary power loss
Speed search start with the Master Frequency reference

value

d 2 Operation continues after momentary power loss

Speed search starts with the min frequency

8 - 05

Settings d 0.3 to d 5.0Sec Unit: 0.1Sec



During a power loss, if the power loss time is less than the time defined by this

aximum Allowable Power Loss Time

actory Setting: d 2.0

parameter, the AC drive will resume operation. If the Maximum Allowable Power Loss
Time is exceeded, the AC drive output is then turned off.

8 - 06

Settings d 0.3 to d 5.0Sec Unit: 0.1Sec

When a mome ntary power loss is detect ed, the AC drive turns off f or a specified time



ase-Block Ti me for Spee d Sear ch

actory Setting: d 0.5

interval determined by Pr.8-06 before resuming operation. This time interval is called
Base-Block. This parameter should be set to a value where the residual output voltage
is nearly zero, before the drive resumes operation.

This parameter also determines the searching time when performing external



Base-Block and fault reset.

8 - 07

Settings d 30 to d 200¦ Unit: 1%

Following a power failure, the AC drive will start its speed search operation, only if the



aximum Speed Search Current Level

actory Setting: d 150

output current is greater than the value determined by Pr.8-07. When the output
current is less than that of Pr.8-07, the AC drive output frequency is at a “speed
synchronization point”. The drive will start to accelerate or decelerate back to the
operating frequency at which it was running prior to the power failure.

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5-38

Output

Frequenc y

Output

Voltag e

08-06

08-05

08-04=d1

Power

Inp ut

Maximum Allowable

Power Loss Time

Baseblock Time

Speed Search

Speed

Synchron ization

Detection

Speed search starts

w ith th e Master

Frequency

S

F
S

F
S

F
S

F
S

F
S

F

08-06

08-05

08-04=d2

Maximum

Allowable P ower Loss Tim e

Baseblock Time

Speed search starts with

Min. Output F requen cy

A

F

VFD-L Series

8 - 08
8 - 09
8 - 10
8 - 11
8 - 12
8 - 13

Settings d 0.0 ⇔ d 400Hz Unit: 0.1Hz

kip Frequency 1 Upper Bound
kip Frequency 1 Lower Bound
kip Frequency 2 Upper Bound
kip Frequency 2 Lower Bound
kip Frequency 3 Upper Bound
kip Frequency 3 Lower Bound

actory Setting: d 0.0
actory Setting: d 0.0
actory Setting: d 0.0
actory Setting: d 0.0
actory Setting: d 0.0
actory Setting: d 0.0

These parameters determine Skip frequency. It will cause the AC drive to skip



operation at these frequency ranges with continuous frequency output.

Pr.8-9, Pr.8-11,Pr.8-13 are for Lower Bound setting, and the settings should follow as



Pr.8-9

x

Pr.8-11xPr.8-13.

8 - 14

Settings d 0 to d 10

After fault occurs (allowable faults: over-current OC, over-voltage OV), the AC drive can



uto Restart After Fault

be reset/restarted automatically up to 10 times. Setting this parameter to 0 will disable
the reset/restart operation after any fault has occurred. When enabled, the AC drive will
restart with speed search, which starts at the Master Frequency.

actory Setting: d 0

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5

VFD-L Series

5-39

A

D

F

D

8 - 15

Settings d 0 AVR function enabled

utomatic Voltage Regulation (AVR)

Factory Setting: d 2

d 1 AVR function disabled
d 2 AVR function disabled when deceleration

AVR function automatically regulates the AC drive output voltage to the Maximum Output



Voltage (Pr.1-02). For instance, if Pr.1-02 is set at 200 VAC and the input voltage is at
200V to 264VAC, then the Maximum Output Voltage will automatically be regarded to 200
VAC.

Without AVR function, the Maximum Output Voltage may vary between 180V to 264VAC,



due to the input voltage varying between 180V to 264 VAC.

Selecting program value d2 enables the AVR function and also disables the AVR function



during deceleration. This offers a quicker deceleration.

8 - 16

Settings d 350 to d 450V* Unit: 1Volt*

ynamic Braking Voltage

actory Setting: d 380*

During deceleration, the DC-bus voltage will increase due to motor regeneration. W hen



DC bus voltage level exceeds the Dynamic Braking Voltage, the DC brake output pins
(B1, B2) will be activated.

8 - 17

The setting frequency is lower than Pr.8-17, the DC Braking will not be activated when



C Braking Lower Bound Limit

Factory Setting: d 0.0

Settings d0.0 to d400 Hz Unit: 0.1Hz

stops.

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5-40

C

VFD-L

Computer

RS485

d1d3d

2

VFD-L

VFD-L

T

T

VFD-L Series

Group 9: Communication Parameters

9 - 00

Settings d 1 to 247

ommunication Address

This parameter can be set during operation.



If the AC drive is controlled by RS-485 serial communication, the communication
address must be set via this parameter.

Factory Setting: d 1

9 - 01

ransmission Speed Factory Setting: d 1

Settings d 0 Baud rate 4800 (data transmission speed: bits / second)

d 1 Baud rate 9600 (data transmission speed: bits / second)
d 2 Baud rate 19200 (data transmission speed: bits / second)

This parameter can be set during operation.

Users can set parameters and control the operation of the AC drive via the RS-485



serial interface of a personal computer. This parameter is used to set the transmission
speed between the computer and AC drive.

9 - 02

Settings d 0 Warn and keep operating

ransmission Fault Treatment

Factory Setting: d 0

d 1 Warn and RAMP to stop
d 2 Warn and COAST to stop
d 3 No Warning and keep operating

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5

VFD-L Series

5-41

M

C

F

6

1

1: +EV

2: GN D

3: SG -

4: SG +

9 - 03

odbus Communication Watchdog Timer

Settings d0 Disable Unit: 1 sec

d1 to d20 1 to 20 sec

This parameter can be set during operation.

If the Watchdog timer function is enabled, the timer will start counting once the first valid



Modbus communication signal is received after power-up or reset. The timer will reset
to 0 after each valid Modbus communication message is received. If the watchdog timer
reaches the value set in Pr. 9-03, the drive will stop its output and display the message
"CE10" on the digital keypad. This fault can reset by an external terminal, keypad or a
Modbus communication reset command.

9 – 04

Settings d 0 Modbus ASCII mode, protocol <7,N,2>

ommunication Protocol

d 1 Modbus ASCII mode, protocol <7,E,1>

Factory Setting: d 0

actory Setting: d 0

This parameter can be set during operation.

1.Computer Control



d 2 Modbus ASCII mode, protocol <7,O,1>
d 3 Modbus ASCII mode, protocol <8,N,2>
d 4 Modbus ASCII mode, protocol <8,E,1>
d 5 Modbus ASCII mode, protocol <8,O,1>
d 6 Modbus RTU mode, protocol <8,N,2>
d 7 Modbus RTU mode, protocol <8,E,1>
d 8 Modbus RTU mode, protocol <8,O,1>



There is a built-in RS-485 serial interface, marked (RJ-11 Jack) on the control

terminal block, for VFD Series. The pins are defined below:
Each VFD-L AC drive has a pre-assigned communication address specified by Pr.
(9-00). The computer then controls each AC drive according to its communication
address.

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5-42

C
A

C
A

( 7.N.2 : Pr.9-04=0)

( 7 .E.1: P r.9-04=1)

Start

bit012345

6

Stop

bit

7-bit character

10-bit character frame

( 7.O.1:Pr.9-04=2)

Odd

parity

Start

bit01

2

345

6

Stop

bit

7-bit character

10-bits character fram e

Even

parity

Start

bit0123456Stop

bit

7-bit character

10-bit character frame

Stop

bit

VFD-L Series

VFD-L can be setup to communicate on Modbus networks using one of the



following modes: ASCII (American Standard Code for Information Interchange) or
RTU (Remote Terminal Unit). Users can select the desired mode along with the
serial port communication protocol in Pr. 9-04.

Code Meaning:



ASCII mode:

Each 8-bit data is the combination of two ASCII characters. For example, a 1-byte
data: 64 Hex, shown as ‘64’ in ASCII, consists of ‘6’ (36Hex) and ‘4’ (34Hex).

haracter ‘0’ ‘1’ ‘2’ ‘3’ ‘4’ ‘5’ ‘6’ ‘7’

SCII code 30H

31H

32H

33H

34H

35H

36H

37H

haracter ‘8’ ‘9’ ‘A’ ‘B’ ‘C’ ‘D’ ‘E’ ‘F’

SCII code 38H

39H

41H

42H

43H

44H

45H

46H

RTU mode:

Each 8-bit data is the combination of two 4-bit hexadecimal characters. For example,
64 Hex.

2.Data Format:



2.1 10-bit character frame (For 7-bit character):

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5

5-43

2.2 11-bit character frame (For 8-bit character):

Start

bit012345

6

Stop

bit

Stop

bit

8-bit character

11-bit character fram e

( 8.N.2:Pr.9-04=3 or 6 )

Start

bit

0123456

Even

parity

Stop

bit

11-bit character fram e

( 8.E.1:Pr.9-04=4 or 7)

Start

bit0123456Stop

bit

11-bit character fram e

( 8.O.1:Pr.9-04=5 or 8)

Odd

parity

777

8-bit character

8-bit character

S
C

C
C

L
E

A
C

C

C

C

A

3.Communication Protocol

VFD-L Series

3.1 Communication Data Frame:

ASCII mode:

STX
ADR 1
ADR 0

CMD 1
CMD 0

DATA (n-1)

…….

DATA 0

LRC CHK 1
LRC CHK 0

END 1
END 0

RTU mode:

STAR T

ADR

CMD

DATA (n-1)

…….

DATA 0

CRC CHK Low

CRC CHK High

END

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tart character ‘:’ (3AH)

ommunication address:

8-bit address consists of 2 ASCII codes

ommand code:

8-bit command consists of 2 ASCII codes

ontents of data:

n

p

8-bit data consist of 2n ASCII codes.

n<=25maximum of 50 ASCII cod es

RC check sum:

8-bit check sum consists of 2 ASCII codes

nd characters:

END1= CR (0DH), END0= LF(0AH)

silent interval of more than 10 ms

ommunication address:

8-bit address

ommand code:

8-bit command

ontents of data:

np8-bit data, n<=25

RC check sum:

16-bit check sum consists of 2 8-bit characters

silent interval of more than 10 ms

VFD-L Series

5-44

C

R

)

3.2 ADR (Communication Address)
Valid communication addresses are in the range of 0 to 254. Communication address
equals to 0 means broadcast to all AC drives (AMD), in this case, the AMD will not
reply any message to the master device.
For example, communication to AMD with address 16 decimal:
ASCII mode: (ADR 1, ADR 0)=’1’,’0’ => ‘1’= 31H, ‘0’=30H

RTU mode: (ADR)=10H

3.3 CMD (Command code) and DATA (data characters)

The format of data characters depends on the command code. The available
command codes are described as followed: Command code: 03H, read N words. The
maximum value of N is 12. For example, reading continuous 2 words from starting
address 2102H of AMD with address 01H.

ASCII mode:

ommand message:

esponse message:

STX ‘:’ STX ‘:’

‘0’ ‘0’ ADR 1

ADR 0

‘1’
‘0’ ‘0’ CMD 1

CMD 0

Starting data

address

‘3’
‘2’ ‘0’

‘1’
‘0’ ‘1’

‘2’ ‘7’
Number of data
(count by word

LRC CHK 0

‘0’ ‘7’

‘0’

‘0’ ‘0’

‘2’ ‘0’

‘D’ ‘0’ LRC CHK 1

‘7’

CR ‘7’ END 1

END 0

LF

CR

ADR 1
ADR 0

CMD 1
CMD 0

Number of data

(count by byte)

Content of

starting data

address

2102H

Content of data

address 2103H

LRC CHK 1
LRC CHK 0

END 1
END 0

‘1’
‘3’

‘4’

‘0’

‘0’
‘1’
LF

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5

5-45

C

R

)

C

R

RTU mode:

ommand message:

ADR 01H

CMD 03H

21H

address
Number of data
(count by word

CRC CHK Low

02H
00H
02H

6FH

CRC CHK High F7H

CRC CHK Low FEH
CRC CHK High 5CH

ADR 01H
CMD 03H
Starting data

17H
00H

esponse message:

Number of data

(count by byte)

Content of data

address 2102H

Content of data

address 2103H

Command code: 06H, write 1 word
For example, writing 6000(1770H) to address 0100H of AMD with address 01H.

VFD-L Series

04H

70H
00H

ASCII mode:

ommand message:

esponse message:

STX ‘:’ STX ‘:’
ADR 1 ‘0’ ADR 1 ‘0’
ADR 0 ‘1’ ADR 0 ‘1’

CMD 1 ‘0’ CMD 1 ‘0’
CMD 0 ‘6’ CMD 0 ‘6’

Data dress ‘0’ Data address ‘0’

‘1’ ‘1’
‘0’ ‘0’
‘0’ ‘0’
‘1’ Data content ‘1’
‘7’ ‘7’
‘7’ ‘7’
‘0’ ‘0’

LRC CHK 1 ‘7’ LRC CHK 1 ‘7’
LRC CHK 0 ‘1’ LRC CHK 0 ‘1’

END 1 CR END 1 CR
END 0 LF END 0 LF

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5-46

C

R

s

)

RTU mode:

VFD-L Series

ommand message:

ADR 01H

CMD 06H

Data address 01H

00H

Data content 17H

70H

CRC CHK Low

86H

CRC CHK High 22H

esponse message:

ADR 01H
CMD 06H
Data address 01H

00H
Data content 17H
70H
CRC CHK Low 86H
CRC CHK High 22H

3.4 CHK (check sum)

ASCII mode:

LRC (Longitudinal Redundancy Check) is calculated by summing up, module 256, the
values of the bytes from ADR1 to last data character then calculating the hexadecimal
representation of the 2’s-complement negation of the sum.
For example, reading 1 word from address 0401H of the AC drive with address 01H

Starting data

Number of data

LRC CHK 0

RTU mode:

Starting addres

Number of data
(count by word

CRC CHK Low

CRC CHK High F7H

STX ‘:’

‘0’ ADR 1

ADR 0

‘1’
‘0’ CMD 1

CMD 0

‘3’
‘0’

address

‘4’
‘0’
‘1’
‘0’
‘0’
‘0’
‘1’

‘F’ LRC CHK 1

01H+03H+04H+01H+00H+01H=0AH, the
2’s-complement negation of 0AH is F6H.

‘6’

CR END 1

END 0

LF

ADR 01H

CMD 03H

21H
02H
00H
02H
6FH

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5

VFD-L Series

5-47

CRC (Cyclical Redundancy Check) is calculated by the following steps:
Step 1: Load a 16-bit register (called CRC register) with FFFFH.
Step 2: Exclusive OR the first 8-bit byte of the command message with the low order byte of

the 16-bit CRC register, putting the result in the CRC register.

Step 3: Sh ift the CRC register one bit to the right with MSB zero filling. Extract and examine

the LSB.

Step 4: If the LSB of CRC register is 0, repeat step 3, else Exclusive or the CRC register

with the polynomial value A001H.

Step 5: Repeat step 3 and 4 until eight shifts have been performed. When this is done, a

complete 8-bit byte will have been processed.

Step 6: Repeat steps 2 to 5 for the next 8-bit byte of the command message. Continue doing

this until all bytes have been processed . The final conten ts of the CRC register are
the CRC value.

When transmitting the CRC value in the message, the upper
and lower bytes of the CRC value must be swapped, i.e. the lower order byte
will be transmitted first.

The following is an example of CRC generation using C language. The function takes two
arguments:
Unsigned char* data

Å

a pointer to the message buffer

Unsigned char length Å the quantity of bytes in the message buffer

The function returns the CRC value as a type of unsigned integer.

Unsigned int crc_chk(unsigned char* data, unsigned char length){
int j;
unsigned int reg_crc=0xFFFF;
while(length--){
reg_crc ^= *data++;
for(j=0;j<8;j++){
if(reg_crc & 0x01){ /* LSB(b0)=1 */
reg_crc=(reg_crc>>1) ^ 0xA001;
}else{
reg_crc=reg_crc >>1;
}
}
}
return reg_crc;
}

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VFD-L Series

5-48

r

g

3.5 Address list:
The contents of available addresses are shown as below:

Content

AC drive Parameters

Command

Status monitor

Read only

Address

Functions

ggnnH gg means parameter group, nn means paramete

number, for example, the address of Pr 4-01 is
0401H. Referencing to chapter 5 for the function
of each parameter. When re ading parameter by
command code 03H, only one parameter can be
read at one time.

2000H

Bit 0-1 00: No function

01: Stop
10: Run
11: Jog + Run

Bit 2-3 Not used

00: No function

Bit 4-5

01: FWD
10: REV
11: Change direction

Bit 6-15 Not used

2001H Freq. command

Bit 0 1: EF (external fault) on

2002H

Bit 1 1: Reset
Bit 2-15 Not used

2100H

Error code:
0: No errors occurred
1: Over-current (oc)
2: Over-voltage (ov)
3: Overheat (oH)
5: Overload1 (oL1)
6: External fault (EF)
7: CPU failure (cF3)
8: Hardware protection failure (HPF)

9: Current exceeds 2 times rated current durin

accel (ocA)

10: Current exceeds 2 times rated current during

decel (ocd)

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5

VFD-L Series

5-49

1

S

p

B

f

B

0
0

1

B
1

B

N
B

1

B

1

B

1
B

1
B

N

Content

Status monitor

Read only

Address

2100H

1: Current exceeds 2 times rated current

Functions

during steady state operation (ocn)
12: Reserved
13: Reserved
14: Low voltage (Lv)
15: CPU failure 1 (cF1)
16: CPU failure 2 (cF2)
17: Base block
18: Overload (oL2)
19: Auto accel/decel failure (cFA)
20: Software protection enable (codE)

tatus of AC Drive

2101H

it 0-1

00: RUN LED light off, STOP LED light u
01: RUN LED blink, STOP LED light up
10: RUN LED light up, STOP LED blink
11: RUN LED light up, STOP LED light of

it 2

1: Jog active

00: REV LED light off, FWD LED light up

it 3-4

1: REV LED blink, FWD LED light up
0: REV LED light up, FWD LED blink

1: REV LED light up, FRD LED light off

it 5-7
it 8

it 9
it 10

it 11
it 12-15

ot used

: Main freq. Controlled by

communication

: Main freq. Controlled by external

terminal

: Operation command controlled by

communication

: Parameters have been locked

ot Used
2102H Frequency command F (XXX.XX)
2103H Output Frequency H (XXX.XX)
2104H Output Current A (XXX.XX)
2105H DC-BUS Voltage U (XXX.XX)
2106H Output Voltage E (XXX.XX)
2107H Step number of Multi-Step Speed Operation
2108H Step numb er of PLC o per ation
2109H Time of PLC Operation

210AH Counter Value

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VFD-L Series

5-50

A

R

3.6 Exception response:
Except for broadcast messages, the AC drive is been expected to return a normal
response after receiving command messages from the master device. The following
depicts the conditions that no normal response is replied to the master device.

The AC drive does not receive the messages due to a communication error; thus, the
AC drive has no response. The master device will eventually process a timeout
condition.

The AC drive receives the messages without a communication error, but cannot handle
it, an exception response will return to the master device and an error message “CExx”
will display on the keypad of AC drive. The xx of “CExx” is a decimal code equal to
the exception code that will describe below.
In the exception response, the most significant bit of the original command code is set
to 1, and an exception code explains the condition that caused the exception is
returned. An example of exception response of command

code 06H and exception code 02H:

SCII mode:

STX ‘:’ ADR 01H

‘0’ CMD 86H ADR 1

ADR 0

CMD 0

‘1’ Exception code
‘8’ CRC CHK Lo w
‘6’ CRC CHK High
‘0’ Exception code
‘2’
‘7’ LRC CHK 1

LRC CHK 0

‘7’

CR END 1

END 0

LF

The meaning of excepti on code:

TU mode:

02H
C3H CMD 1
A1H

The AC drive receives the messages, but detects a communication error, thus, no response is
returned, but there will be error message “CExx” displayed on the keypad of AC drive. The
master device will eventually process a timeout condition. The xx of “CExx” is a decimal
code, the meaning of the error message is below:

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5

VFD-L Series

5-51

or

e

e

is

Error message

1

2

3

4

5 Reserved

6

7 Reserved
8 Reserved

Meaning
Illegal command code:
The command code received in the command message is not available f
the AC drive.
Illegal data address:
The data address received in the command message is not available for th
AC drive.
Illegal data value:
The data value received in the command message is not available for th
AC drive.
Slave device failure:
The AC drive is unable to perform the requested action.

AC drive busy:
The time interval between commands is too short. Please keep an interval

of 10ms at least after the return of a command. If no command returned,
please keep a 10ms interval at least for the same reason.

9

Check Sum Error
Check if the Check Sum is correct.
Watchdog Timer

10

The timer will reset to 0 after each valid Mo dbus communication message
received.

Frame Error:

11

Check if the Baud rate comply with the data format.

12 The command message is too short.
13 Command message length is out of range.

14

The command messages include the data that does not belong to ‘0’ to ‘9’,
‘A’ to ‘F except starting and end character (only for Modbus ASCII mode).

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VFD-L Series

5-52

3.7 Communication program of PC:
The following is a simple example of how to write a communication program for Modbus
ASCII mode on a PC by C language.

#include<stdio.h>
#include<dos.h>
#include<conio.h>
#include<process.h>

#define PORT 0x03F8 /* the address of COM1 */

/* the address offset value relative to COM1 */
#define THR 0x0000
#define RDR 0x0000
#define BRDL 0x0000
#define IER 0x0001
#define BRDH 0x0001
#define LCR 0x0003
#define MCR 0x0004
#define LSR 0x0005
#define MSR 0x0006

unsigned char rdat[60];
/* read 2 data from address 2102H of AC drive with address 1 */
unsigned char tdat[60]={':','0','1','0','3','2','1','0',’2',
'0','0','0','2','D','7','\r','\n'};

void main(){
int i;
outportb(PORT+MCR,0x08); /* interrupt enable */
outportb(PORT+IER,0x01); /* interrupt as data in */
outportb(PORT+LCR,(inportb(PORT+LCR) | 0x80));
/* the BRDL/BRDH can be access as LCR.b7==1 */
outportb(PORT+BRDL,12); /* set baudrate=9600,
12=115200/9600*/
outportb(PORT+BRDH,0x00);
outportb(PORT+LCR,0x06); /* set protocol, <7,N,2>=06H

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5

VFD-L Series

5-53

<7,E,1>=1AH, <7,O,1>=0AH
<8,N,2>=07H, <8,E,1>=1BH
<8,O,1>=0BH */
for(i=0;i<=16;i++){
while(!(inportb(PORT+LSR) & 0x20)); /* wait until THR empty */
outportb(PORT+THR,tdat[i]); /* send data to THR */
}

i=0;
while(!kbhit()){
if(inportb(PORT+LSR) & 0x01){ /* b0==1, read data ready */
rdat[i++]=inportb(PORT+RDR); /* read data form RDR */
}
}
}

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

6

VFD-L Series

6-1

CHAPTER 6 MAINTENANCE AND INSPECTIONS

Modern AC drives are based on solid state electronics technology, preventive maintenance is
required to operate this AC drive in its optimal condition, and to ensure a long life. It is
recommended to perform a monthly check up of the AC drive by a qualified technician.
Before the check up, always turn off the AC Input Power to the unit. Wait at least 2 minutes
after all display lamps have gone out.

6.1 Periodic Inspection:

Basic check up items to detect if there were any abnormality during the operation:

1. Whether the motors are operating as expected.

2. Whether the installation environment is abnormal.

3. Whether the cooling system is operating as expected.

4. Whether any irregular vibration or sound occurred during the operation.

5. Whether the motors are overheated during the operation.

6. Always check the input voltage of the AC drive with Voltmeter.

6.2 Periodic Maintenance



WARNING! Disconnecting AC power before processing!

1. Tighten and reinforce the screws of the AC drive if necessary, cause it may loose due to

the vibration or changing of temperatures.

2. Whether the conductors or insulators were corroded and damaged.

3. Check the resistance of the insulation with Mega-ohmmeter.

4. Often check and change the capacitors and relays.

5. If use of the AC drive is discontinued for a long period of time, turn the power on at least

once every two years and confirm that it still functions properly. To confirm functionality,
disconnect the motor and energize the AC drive for 5 hours or more before attempting to
run a motor with it.

6. Clean off any dust and dirt with a vacuum cleaner. Place special emphasis on cleaning

the ventilation ports and PCBs. Always keep these areas clean, as accumulation of dust
and dirt can cause unforeseen failures.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

7

VFD-L Series

7-1

CHAPTER 7 Troubleshooting and Fault Information

The VFD-L AC drive has a comprehensive fault diagnostic system that includes
several different alarms and fault messages. Once a fault is detected, the
corresponding protective functions will be activated. The following faults are
displayed on the AC drive digital keypad. The six most recent faults can be
read on the digital keypad display by viewing Pr.6-07 to Pr.6-12.

NOTE: Faults can be cleared by a reset from the keypad or Input Terminal.

Common Problems and Solutions:

Fault

Name

Fault Descriptions

The AC drive detects an
abnormal increase in
current.

The AC drive detects
that the DC bus voltage
has exceeded its
maximum allowable
value.

Corrective Actions

1. Check whether the motors horsepower
corresponds to the AC drive output
power.

2. Check the wiring connections between
the AC drive and motor for possible
short circuits.

3. Increase the Acceleration time.

4. Check for possible excessive loading
conditi ons at th e mot or .

5. If there are any abnormal conditions
when operating the AC drive after
short-circuit being removed, it should
be sent back to manufacturer.

1. Check whether the input voltage falls
within the r at e d AC d ri ve i npu t vo lt ag e.

2. Check for possible voltage transients.

3. Bus over-voltage may also be caused
by motor regeneration. Either increase
the decel time or add an optional
braking resistor.

4. Check whether the required braking
power is within the specified limits.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

7-2

C
t

T
e
c

1
2

3
4

I
o

1
2

3
4

1
2

1
2

Fault

Name

Fault Descriptions

The AC drive
temperatur e se ns or
detects excessive heat.

The AC drive detects
that the DC bus voltage
has fallen below its
minimum value.

he AC drive detects

xcessive drive output

urrent.

nternal electronic

verload trip

Motor overload. Check
the paramete r se tt ing s
(Pr.6-03 to Pr.6-05)

Communication Error

Corrective Actions

1. Ensure that the ambient temperature
falls within the specified temperature
range.

2. Make sure that the ventilation holes are
not obstructed.

3. Remove any foreign objects on the
heatsinks and check for possible dirty
heat sink fins.

4. Provide enough spacing for adequate
ventilation.

heck whether the input voltage falls within

he rated AC drive’s input voltage.

. Check whether the motor is overloaded.
. Reduce torque compensation setting as

set in Pr.7-02.
. Increase the AC drive’s ou tput c apac ity.
.

Note:

of the rated current for a maximum of 60

seconds.

The AC drive can withstand up to 150%

. Check for possible motor overload.
. Check electronic thermal overload

setting.
. Increase motor capacity.
. Reduce the current level so that the

drive output current does not exceed the

value set by the Motor Rated Current

Pr.7-00.
. Reduce the motor load.
. Adjust the over-torque detection setting

to an appropriate setting (Pr.06-03 to

Pr.06-05).
. Check the connection between the AC

drive and computer for loose wires.
. Check if the communication pr otoc ol is

properly set.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

7

VFD-L Series

7-3

1
2
3
4

1
2
3

4

a

1
2
3

1
2

3

1

2

3

1

2
3

a

F

1

2

1
2

Fault

Name

Fault Descriptions

Over-current during

Corrective Actions

acceleration:

. Short-circuit at motor

output.

. Torque boost too

high.

. Acceleration time too

short.

. AC drive output

capacit y is to o sm all .
Over-current during
deceleration:

. Short-circuit at motor

output.

. Deceleration time too

short.

. AC drive output

capacit y is to o sm all .
Over-current during

. Check for possible poor insulation at the

output line.

. Decrease the tor que boost setting in

Pr.7-02.
. Increase the acceler ati o n time.
. Replace the AC drive with one that has

higher output capacity (next HP size).

. Check for possible poor insulation at the

output line.
. Increase the deceleration time.
. Replace with the AC drive with one that

has a higher output capacity (next HP

size).

steady state operation:

. Short-circuit at motor

output.

. Sudden increase in

motor loading.

. AC drive output

capacit y is to o sm all .

. Check for possible poor insulation at the

output line.
. Check for possible motor stall.
. Replace the AC drive with one that has

higher output capacity (next HP size).

The external terminal
EF-GND goes from OF
to ON.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

Internal memory IC can
not be programmed.

. When external terminal EF-GND is

closed, the output will be turned off.

(Under N.O. E.F.)
. Press RESET after fault has been

cleared.
. Return to the factory.

. Check the EEPROM on the control

board.

VFD-L Series

7-4

1
2

D
/

1

2

Name

Fault

Fault Descriptions

Internal memory IC can
not be read.

Drive’s internal circuitry
abnormal.

Hardware protection
failure

Software protection
failure

Auto accel/decel failure

External Base Block.
AC drive output is

turned off.

Corrective Actions

. Return to the factory.
. Reset drive to factory defaults.

Return to the factory.

Return to the factory.

Return to the factory.

on’t use the function of auto acceleration

deceleration.

. When the external input terminal (B.B)

is active, the AC drive output will be
turned off.

. Di s able t his co nnect i on an d the A C

drive will begin to work again.

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

8

8-1

CHAPTER 8 SUMMARY OF PARAMETER SETTINGS

P

rs

y

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g

nt

P

rs

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Group 0: User Parameters

=

The parameter may be set during operation.

VFD-L Series

Factor

Settin

aramete

0-00

Functions Settings

Identity code of drive
(Read only)

1: 40W
2: 100W
3: 200W
4: 400W
5: 750W
6: 1.5KW

0-01

Rated current display
(Read only)

40W: 0.4A
100W: 0.8A
200W: 1.6A
400W: 2.5A
750W: 4.2A

1.5K: 7.0A

0-02 Parameter reset 10: Reset Parameters to Factory Settin

=

0-03 Start-up display of AC

drive

0: F (Frequency command)
1: H (output frequency)
2: U (user-defined un it)

0

0

3: A (output current)

=

0-04 User-defined Unit

0: Display User-Defined Unit (u )
1: Display Counter Value (C)

0

2: Display Process Operation (1=tt)
3: Display DC-BUS voltage (U)
4: Display output voltage (E)

=

0-05 User-defined coefficie

K

0.1 ~ 160

1.0

0-06 Software version Read only #.#
0-07 Password input 0 ~ 999 0
0-08 Password configuration 0 ~ 999 0

Group 1: Basic Parameters

aramete

1-00

Maximum operation
Freq.

Functions Settings

1-01 Maximum setting Freq. 10.0 ~ 400Hz 60.0
1-02 Maximum outp ut voltage 2.0 ~ 255V 220
1-03 Mid-point freq. 1.0 ~ 400Hz 1.0
1-04 Mid-point voltage 2.0 ~ 255V 12.0
1-05 Minimum output freq. 1.0 ~ 60.0Hz 1.0

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

Factor

Settin

50.0 ~ 400Hz 60.0

VFD-L Series

8-2

P

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Factor

Settin

aramete

Functions Settings

1-06 Minimum output voltage 2.0 ~ 255V 12.0
1-07 Upper bound of freq. 1 ~ 110% 100
1-08 Lower bound of freq. 0 ~ 100% 0.0

=
=
=
=
=
=
=

1-09 Accel time 1 (Tacc1) 0.1 ~ 600 Sec 10.0
1-10 Decel time 1 (Tdec1) 0.1 ~ 600 Sec 10.0
1-11 Accel time 2 0.1 ~ 600 Sec 10.0
1-12 Decel time 2 0.1 ~ 600 Sec 10.0
1-13 JOG Accel time 0.1 ~ 600 Sec 10.0
1-14 JOG Decel time 0.0 ~ 600 Sec 10.0
1-15 JOG frequency 1.0Hz~400Hz 6.0
1-16 Auto-accel/decel

0: Linear Accel/Decel

0
1: Auto accel, linear decel
2: Linear accel, auto decel,
3: Auto Accel/Decel
4: Linear accel. Auto decel, stall

prevention during dece l er ati on

5: Auto accel. Linear decel, stall

prevention during dece l er ati on

1-17
1-18

S-curve setting in
acceleration
S-curve setting in
deceleration

0 ~ 7 0
0 ~ 7 0

Group 2: Operation Method Parameters

aramete

2-00 Source of frequency

command

Functions Settings

0: Digital keypad
1: 0 ~ 10V from AVI

Factor

Settin

0

2: 4 ~ 20mA from AVI
3: Controlled by V.R on drive
4: RS-485 communication interface

2-01 Source of operation

command

0: By digital keypad
1: By external terminals, keypad STOP

0

enable

2: By external terminals, keypad STOP

disable

3: By RS-485 communication interface,

keypad STOP enable

4: By RS-485 communication interface,

keypad STOP disable

2-02 Stop method

0: Ramp stop

0

1: Coast stop

2-03 Carrier freq.

3 ~10K Hz

10

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

8

VFD-L Series

8-3

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D

1
T

0
P
M
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0
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
1

P

rs

y

g

s

q.

2-04 Reverse operation

inhibit

0: Enable reverse
1: Disable reverse

0

2: Disable forward

2-05 ACI (4 ~ 20mA)

input loss detection

0: Accel to 0Hz
1: Stop immediately, display EF

0

2: Run with the last freq.

2-06 Line Start Lockout

0: Enable

0

1: Disable

Group 3: Output Function Parameters

Factor

Settin

8

aramete

3-00
3-01
3-02
3-03

esired freq. attained

erminal count value

reliminary count value 0 ~ 999 0

ulti-function (relay

utput)

Functions Settings

.0 ~ 400 Hz 1.0
~ 999 0

: not used
: AC drive operational
: Max. Output Freq. Attained
: Zero Speed
: Over Torque
: Base-Block (B.B.)
: Low Voltage Detection
: AC Drive Operation Mode
: Fault Indication
: Desired Freq. Attained
0: PLC Program Running

1: PLC Program Step Complete

2: PLC Program Complete
3: PLC Program Operation Pause
4: Terminal Count Value Attained
5: Preliminary Count Value Attained
6: Ready State Indicator

Group 4: Input Function Parameters

=

=

=

aramete

4-00
4-01
4-02

Functions Settings
Potentiometer bia

freq.
Potentiometer bias
polarity
Potentiometer fre
gain

4-03 Potentiometer 0: not used

reverse motion 1: reverse motion enable
enable 2: forward motion only

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

Factor

settin

0.0



350Hz

0.0
0: positive bias 1: negative bias 0
1200&

100

0

VFD-L Series

8-4

P

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)

s

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y

e

aramete

4-04

4-05
4-06

Functions Settings
Multi-function input

terminal1 (M0, M1)
(d 0d 20)

Multi-function input
terminal 2(M2)
Multi-function input
terminal 3(M3)
(d 0, d 4d 20)

0: not used
1: M0: FWD/STOP, M1:REV/STOP
2: M0: FWD/REV, M1:RUN/STOP

3: M0, M1, M2: 3-wire operation contr

mode
4: External fault, normally open (N.O.)
5: External fault, normally closed (N.C.)
6: RESET
7: multi-step speed command 1

Factor

settin

8: multi-step speed command 2
9: jog operation
10: accel/decel speed inhibit

11: first or second accel/decel time selectio
12: base-block (B.B.),normally open (N.O.)

13: base-block (B.B.),normally closed (N.C
14: increase master freq.
15: decrease master freq.
16: run PLC program
17: pause PLC
18: counter trigger signal
19: counter reset
20: select ACI/deselect AVI

1

6
7

Group 5: Multi-step Speed and PLC Parameters

Parameter

5-00 1st step speed freq. 0.0 ~ 400Hz 0.0
5-01

2nd step speed freq. 0.0 ~ 400Hz 0.0
5-02 3rd step speed freq. 0.0 ~ 400Hz 0.0
5-03 PLC mode 0: Disable PLC operation

Functions Settings

1: Execute one program cycle

Factor

Settin

0

2: Continuously execute program cycles
3: Execute one program cycle step b

step (separate by STOP)

4: Continuously execute one progra

5-04 PLC forward/revers

motion

cycle step by step (separate b
STOP)

0 ~ 15 (0: Forward 1: Reverse) 0

5-05 Time duration step 0 0 ~ 65500 Sec 0
5-06 Time duration step 1 0 ~ 65500 Sec 0
5-07 Time duration step 2 0 ~ 65500 Sec 0
5-08 Time duration step 3 0 ~ 65500 Sec 0

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

8

8-5

Group 6: Protection Parameters

s

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n
n

er
n
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nt

VFD-L Series

Parameter

6-00

Over-Voltage Preventio
Level

6-01 Over-current Preventio

Level

Functions Settings

0:disable

350~410V

0: disable

20~200%

6-02 Over-torque detection 0:disable

Factor

Settin

390
170

0

1:enable during constant speed

operation and continues until the
continuous limit is reached.

2:enabled during constant speed

operation and halted after detecti o n.

3:enabled during accel and continues

before continuous output time limit is
reached.

4:enabled during accel and halted aft

6-03
6-04

6-05

Over-torque detectio
level
Over-torque detectio
time
Electronic thermal
overload relay

6-06

Electronic thermal
characteristic

6-07 Present fault record
6-08

6-09
6-10

6-11

Second most rece
fault record
Third most recent fault
record
Forth most recent fault
record
Fifth most recent fault
record

over-torque detection.

30 ~ 200% 150

0.1 ~ 10.0 Sec 0.1
0: Not used

0
1: Act with standard motor
2: Act with special motor

30~600 Sec 60
0: No fault occurred

0
1: oc (over current)
2: ov (over voltage)
3: oH (over heat)
4: oL (over load)
5: oL1 (electronic thermal)
6: EF (external fault)
7: Reserved
8: Reserved
9: ocA (current exceed during

acceleration)

6-12

Sixth most recent fault
record

10: ocd (current exceed during

deceleration)

11: ocn (current exceed during steady

state)

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

8-6

s

y

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s

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el

r

Group 7: Motor Parameters

Parameter

=
=
=
=

7-00 Motor rated current 30~120 % 85
7-01 Motor no-load current 0 ~ 90 % 50
7-02 Torque compensation 0 ~ 10 1
7-03 Slip compensation 0.0 ~ 10.0 0.0

Functions Settings

Settin

Group 8: Special Parameters

Factor

Factor

Parameter

8-00 DC braking voltage lev
8-01

DC braking time during
start-up

Functions Settings

Settin

0 ~ 30% 0

0.0 ~ 60.0 Sec 0.0

DC braking time during

8-02

stopping

0.0 ~ 60.0 Sec 0.0

Start-point for DC

8-03

braking

8-04 Momentary power loss

0.0 ~ 400.0 Sec 0.0

0: Stop operation after mo me ntar y

0

power loss.

1: Continues after momentary power

loss, speed search starts with maste
freq.

2: Continues after momentary power

loss, speed search starts with min.
output freq.

8-05

Max. allowable power
loss time
B.B. time for speed

8-06

search
Max. speed search

8-07

current level
8-08 Skip freq. 1 upper bound 0.0~400 Hz 0.0
8-09 Skip freq. 1 lower bound 0.0~400 Hz 0.0
8-10 Skip freq. 2 upper bound 0.0~400 Hz 0.0
8-11 Skip freq. 2 lower bound 0.0~400 Hz 0.0
8-12 Skip freq. 3 upper bound 0.0~400 Hz 0.0
8-13 Skip freq. 3 lower bound 0.0~400 Hz 0.0

0.3 ~ 5.0 Sec 2.0

0.3~5.0 Sec 0.5

30~200% 150

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

8

VFD-L Series

8-7

s

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D
D

d

l

s

F

ry

g

Parameter

8-14 Auto restart after fault 0~10 0
8-15 AVR function 0: A VR functi o n enable

Functions Settings

Settin

2

1: AVR function disable

Factor

8-16
8-17

yn a m i c b r a k in g vo ltag e 350 ~ 450V 380
C braking lower boun

imit

2: AVR function disable when decel

0.0 ~ 400 Hz 0.0

Group 9: Communication Parameters

acto

Parameter

=

=

9-00

Communication
address

9-01 Transmission speed

Functions Settings

Settin

1 ~ 247 1
0: Baud rate 4800

1

1: Baud rate 9600
2: Baud rate 19200

=

9-02

Transmi ssi on fault
treatment

0: Warn and continue running
1: Warn and ramp to stop

0

2: Warn and coasting stop
3: No warn and keep running

Modbus

=

9-03

watchdog timer

communication

0: Disable
1~20: 1 ~ 20 Sec

0

=

9-04

Communication
protocol

0

0: 7,N,2
1: 7,E,1

ASCII

mode

2: 7,O,1
3: 8,N,2
4: 8,E,1
5: 8,O,1

RTU

6: 8,N,2
7: 8,E,1

mode

8: 8,O,1

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

A

A-1

V
M

A

Rated Output Capacity (KVA)

0.6

1.0

0.6

1.0

1.6

2.7

R
M

s

t

e

R
R

I

F
C
O

T
O

A
V
S
K

y

E

P

A
(
U

K

E

RS-485 communication port

l

l

,

,

,

SPECIFICATIONS

oltage Class 115V 230V

odel Number VFD-

pplicable Motor Output (kW) 0.2 0.4 0.2 0.4 0.7 1.5

ated Output Current (A) 1.6 2.5 1.6 2.5 4.2 7.0

ax. Output Voltage (V)

ated Frequency (Hz) 1.0~400Hz

Output Rating

ated Input Current (A) 6 9 4.9/1.9

nput voltage Tolerance

Power

requency tolerance

ontrol system

utput Frequency Resolution

orque Characteristics

verload Endurance 150% of rated current for 1 minute
ccel/Decel Time 0.1~600Sec. (can be set individually)
/F pattern V/F pattern adjustable

Control Characteristics

tall Prevention Level 20~200%, setting of Rated Current

Frequenc

Setting

Operation

Setting

Signal

Multi-function Input Signal

Operating Characteristics

Multi-function Output Signa

Other Function

Protection

Installation Location Altitude 1,000 m or below, keep from corrosive gasses, liquid and dust

Ambient Temperature
Storage Temperature

Ambient Humidity Below 90%RH (non-condensing)

Environment

L

eypad

xternal Signal

eypad Setting by RUN//STOP keys

xternal Signal

Other Including EMI Filter

Cooling Forced air-cooling

Vibration 9.80665m/s2(1G) less than 20Hz, 5.88m/s2 (0.6Gat) 20 to 50Hz

A/B 002 004 002 004 007 015

3-phase correspond

o double input voltag

Single phase

90~132V 50/60Hz

SVPWM (Sinusoidal Pulse Width Modulation, carried frequency

Including the auto-torque, auto-slip compensation, starting torque can be

otentiometer-5KΩ/0.5W, DC 0 ~ +10V (input impedance 100KΩ), 4~20m

output impedance 250Ω), multi-function inputs1 to 3 (3steps, JOG,

P/DOWN command), communication setting

M0,M1,M2,M3 can be combined to offer various modes of operation,

Multi-step selection 0 to 3, Jog, accel/decel inhibit, first/second accel/dece

switch, counter, PLC Operation, external Base Block (NC,N O) selection

AC Drive Operating, Frequency Attained, Non-zero speed, Base Block,

Fault Indication, Local/Rem ote ind icati on, PL C Operat i on ind icati on.

AVR, S-curve, Over-Voltage Stall Prevention, DC Braking, Fault Records

Adjustable Carried Frequency, Starting Frequency Setting of DC Braking

Over-Current Stall Prevention, Momentary Power Loss restart, Reverse

Inhibition, Frequency Limits, Parameter Lock/Reset

Over Voltage, Over Current, Under Voltage, Overload, Electronic thermal

-10:-40: (Non-Condensing and not frozen)

Three-phase corresponds to input voltage

6.5/2.7 9.7/5.1 */9

Single / 3-phase

180~264V 50/60Hz

±

5%

3kHz~10kHz)

0.1Hz

150% at 5 Hz

Setting by

Overheating, Self-t esting

çð

keys or V.R

-20: to 60:

VFD-L Series

3-phase

180~264V

50/60Hz

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

B

VFD-L Series

B-1

)

I

)

V

V
V

)

)

ACCESSORIES

B.1 Non-fuse Circuit Breaker Chart

Per UL 508C, paragraph 44.8.6, part a,

1. For 1-phase drives, the current rating of the breaker shall be four times maximum of input
current rating.

2. For 3-phase drives, the current rating of the breaker shall be four times maximum of output
current rating.

(Note: Please select enough current capacity of NFB.)

1-phase 3-phase

Model

VFD002L11A

VFD002L21A

VFD004L11A
VFD004L21A
VFD007L21A

Input Current (A

6.0

4.9 VFD004L21A

9.0 VFD007L21A

6.5

9.7

VFD002L21A

VFD015L23A

Fuse Specification Chart

Smaller fuses than those shown in the table are permitted.

Model

Output Current (A

1.6

2.5

4.2

7.5

Model I (input)(A

VFD002L11A 6.0 1.6 15(20)

FD002L21A(1 /3

VFD004L11A 9.0 2.5 30 JJN-30

FD004L21A(1 /3
FD007L21A(1 /3

VFD015L23A 9.0 7.5 30 JJN-30



4.9/1.9 1.6/1.6 15/6.4



6.5/2.7 2.5/2.5 20/10 JJN-20/JJN-10



9.7/5.1 4.2/4.2 30/16.8

(output)(A

I (A) Bussmann P/ N

Line Fuse

JJN-15(20)

JJN-15/JJN-6

JJN-30/JJN-15

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

C

C-1

DIMENSIONS

Unit: mm (inches)

VFD-L Series

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

D

VFD-L Series

D-1

DELTA ELECTRONICS, INC.

EC Declaration of Conformity

According to the Low Voltage Directive 73/23/EEC and the

Amendment Directive 93/68/EEC

For the following equipment:
AC Motor Drive

(Product Name)

VFD002L11A, VFD002L11B, VFD002L21A, VFD002L21B, VFD004L11A,
VFD004L11B, VFD004L21A, VFD004L21B, VFD007L21A, VFD007L21B,
VFD015L23A

(Model Name)

is herewith confirmed to comply with the requirements set out in the Council
Directive 73/23/EEC for electrical equipment used within certain voltage limits
and the Amendment Directive 93/68/EEC. For the evaluation of the compliance
with this Directive, the following standard was applied:

EN 50178

The following manufacturer/importer is responsible for this declaration:

Delta Electronics, Inc.
(Company Name)

31-1,Shien Pan Road, Kuei San Industrial Zone, Taoyuan Shien, Taiwan,
R.O.C.
(Company Address)

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED

VFD-L Series

D-2

DELTA ELECTRONICS, INC.

EC Declaration of Conformity

According to the Electromagnetic Compatibility 89/336/EEC and

the Amendment Directive 93/68/EEC

For the following equipment:

AC Motor Drive
(Product Name)

VFD002L11A, VFD002L11B, VFD002L21A, VFD002L21B, VFD004L11A,
VFD004L11B, VFD004L21A, VFD004L21B, VFD007L21A, VFD007L21B,
VFD015L23A
(Model Designation)

is herewith confirmed to comply with the requirements set out in the Council
Directive 89/336/EEC for electromagnetic compatibility and the Amendment
Directive 93/68/EEC. For the evaluation of the compliance with this Directive, the
following standard was applied:

EN61800-3, EN55011, EN61000-4-2, EN61000-4-3, EN61000-4-4,
EN61000-4-5, EN61000-4-6, EN61000-4-8
The following manufacturer/importer is responsible for this declaration:

Delta Electronics, Inc.
(Company Name)

31-1,Shien Pan Road, Kuei San Industrial Zone, Taoyuan Shien, Taiwan,
R.O.C.
(Company Address)

DELTA ELECTRONIC S, INC. ALL RIGHTS RESERVED