Accuenergy Acuvim-CL-M-1A-P1, Acuvim-DL-M-1A-P2, Acuvim-DL-D-1A-P2, Acuvim-CL-M-1A-P2, Acuvim-DL-M-1A-P1 User manual

Copyright© 2013 V2.01

This manual may not be altered or reproduced in whole or in part by any means
without the expressed written consent of Accuenergy.

The information contained in this document is believed to be accurate at the time of
publication, however, Accuenergy assumes no responsibility for any errors which may
appear here and reserves the right to make changes without notice. Please ask the
local representative for latest product specications before ordering.

Acuvim-L

[ Document #1030E2201 Revision Date: Apr, 2013 ]

I

Please read this manual carefully before installation, operation and maintenance of
Acuvim-L power meter.

Acuvim-L

The following symbols in this manual and on Acuvim-L series meters are used to
provide warning of danger or risk during the installation and operation of the meters.

Electric Shock Symbol: Carries information about procedures which must be
followed to reduce the risk of electric shock and danger to personal health.

Safety Alert Symbol: Carries information about circumstances which if not
considered may result in injury or death.

This mark indicates that this product is UL listed.

Installation and maintenance of the Acuvim-L power meter should only be performed
by qualied, competent professionals who have received training and should have
experience with high voltage and current device.

Accuenergy shall not be responsible or liable for any damages caused by improper
meter installation and/or operation.

II

Content

Chapter 1 Introduction-------------------------------------------------------------------1

1.1 Functionality ---------------------------------------------------------------2

1.2 Areas of application -------------------------------------------------------------2

1.3 Meter overview--------------------------------------------------------------3

Chapter 2 Installation---------------------------------------------------------------------7

2.1 Appearance and dimensions---------------------------------------------9

2.2 Installation Method-------------------------------------------------------------12

2.3 Wiring -------------------------------------------------------------------------------15

Chapter 3 Meter Operation and Parameter Setting-------------------------------31

3.1 Display Panel and Keys------------------------------------------------32

3.2 Metering Data Reading--------------------------------------------------34

3.3 Statistics Display-------------------------------------------------------------42

3.4 System Parameter Setting -----------------------------------------------------47

3.5 DO Parameter Setting and Expansion module Setting----------------54

3.6 Ethernet Network Module Settings----------------------------------------- 61

3.7 DI Status Display ----------------------------------------------------------------65

3.8 TOU Energy and Maximum Demand Display-------------------------66

3.9 Measurement Methods and Parameter Denitations------------------69

Chapter 4 Communication-------------------------------------------------------------------------85

4.1 Modbus protocol introduction-----------------------------------------------86

4.2 Modbus protocol----------------------------------------------------------------87

4.3 Communication format-------------------------------------------------89

4.4 Ethernet Module (AXM-NET)-------------------------------------------------94

Acuvim-L

III

4.5 Data address table------------------------------------------------------------134

Appendix A Technical data and Specication-----------------------------------------------178

Acuvim-L

Appendix B Ordering Information-------------------------------------------------------------182

Appendix C Revision History---------------------------------------------------------------------184

IV

Starting!

Congratulations!

You have purchased an advanced, versatile and multifunction power meter. This
meter can work as a remote terminal unit (RTU) that contributes to your system’s
stability and reliability by providing real-time power quality monitoring and analysis.
When you open the package, you will nd the following items:

1. Acuvim-L power meter 1

2. Terminal Blocks 3 (2 for basic model)

3. [INSERT] Installation Clips 4

4. Product Disk (Manual, Warranty, Software) 1

5. Additional documentation
(Quick Setup Guide, Calibration Certicate) 2

To avoid complications, please read this manual carefully before installation and
operation of the Acuvim-L series meter.

Chapter 1 Chapter 1 Introduction.

Chapter 2 Installation and Wiring.

Chapter 3 Meter Display and Parameter Settings.

Chapter 4 Communication Protocols and Modbus Map.

Appendix Technical Data, Specications and Ordering Information.

Acuvim-L

V

Chapter 1 Introduction

1.1 Functionality

1.2 Areas of Application

1.3 Meter Overview

1.1 Functionality

Acuvim-L

Multifunction, high accuracy

Acuvim-L series multifunction power meter is designed with the latest
microprocessor and digital signal process technology. It can measure voltage,
current, active power, reactive power, apparent power, power factor for three
phases, individual harmonics up to the 2
energy, current and demand and max/min values for real time readings.

The optional Digital Output and RS485 communication can be used for sending
energy pulse output and event alarming signals. The RS485 port also can be used
for remote meter controlling and data collection. Acuvim-L series meter delivers
exceptional metering functionality and provides a cost effective solution for
customers.

Compact and Easy to Install

Acuvim-L series meter can be installed into a standard ANSI C39.1 (4" round) or
an IEC 92mm DIN (square) slot. With the 51mm depth , the meter can be installed
in a small cabin. Installation clips are used for easy installation and removal.

Easy to use

All metering data and setting parameters can be accessed by using the front
panel keys or via the communication port. Setting parameters are stored in the
EEPROM so that content will be maintained even when the meter is powered o.

Multiple Wiring Modes

The Acuvim-L series meter can be used in high voltage, low voltage, three phase
three wires, three phase four wires and single phase systems by using dierent
wiring mode settings.

nd

or 31th order, THD, real and reactive

1.2 Application Area

2

Acuvim-L series meter is the ideal choice for replacing traditional, analog
electric meters. It uses true RMS measuring methods so that nonlinear load can
be monitored. Except providing means of monitoring and measuring power
distribution automation system, it can also be used as a remote terminal unit
(RTU) for monitoring and controlling a SCADA system. Users can access all
measurement parameters via the optional RS485 communication port with

TM

Modbus

protocol. Main application areas Electric Switch Gear and Control

Panels include:

Power Distribution Automation Electric Switch Gear and Control Panels
Industrial Automation Building Automation
Energy Management Systems Marine Applications

Renewable Energy

1.3 Meter Overview

The Acuvim-L series have six standalone models: Acuvim-AL(basic model),
Acuvim-BL(basic model + 2DO), Acuvim-CL(basic model + RS485), Acuvim­DL(basic model + RS485 + Extend IO), Acuvim-EL(TOU + RS485 + Extend IO) and
Acuvim-KL(Simplied Acuvim-CL). Please see table 1-1 for their functionalities
and details.

Real Time

Measuring

Function Parameters AL BL CL DL EL KL

Voltage U1, U2, U3,U12, U23, U31

Current

Power P1, P2, P3, Psum

Reactive Power Q1, Q2, Q3, Qsum
Apparent

Power
Power Factor PF1, PF2, PF3, PF
Load Nature L/C/R
Frequency F

Table 1-1 Functions of Acuvim-L series

I1, I2, I3,In,(Acuvim­KL non-neutral current
measurement)

S1, S2, S3, Ssum

    

     

     

     

     

     
    
    

Acuvim-L

3

Acuvim-L

Function Parameters AL BL CL DL EL KL

Energy

Demand

TOU

Power Quality

Energy Ep_imp, Ep_exp
Reactive Energy Eq_imp, Eq_exp
Apparent

Energy
Current

Demand

Power Demand

Energy/max
demand

Es

Dmd_I1, Dmd_I2,
Dmd_I3

Dmd_Psum, Dmd_
Qsum,
Dmd_Ssum

TOU, 4 Taris,
12 Seasons, 14
Schedules

Daylight
Daylight
Saving Time

saving time

automatically

adjust
10-year

holidays

Voltage
Unbalance

Current
Unbalance

Voltage THD

Current THD

Individual
Harmonics

Up to decade

holidays settings

U_unbl

I_unbl

THD_V1, THD_V2,

THD_V3

THD_I1, THD_I2,

THD_I3

nd

to 31th(Voltage

2

and Current)

     
     

     

    

    







    

    

    

    

    

4

Dmd_I1_max,
Dmd_I2 _max,
Dmd_I3_max

Dmd_Psum_max,
Dmd_Qsum_max,
Dmd_Ssum_max

Umax, Umin

Imax, Imin

Statistics

Max Current
Demand

Max Power
Demand

Max/Min
Voltage

Max/Min
Current

Running Hour Hour

HOUR

Load Running
Hour

Hour

Energy Pulse
Output/Alarm

I/O

Output
Expansion I/O

module

RS-485

Ethernet
(Extended
communication

COMMUNICATION

module)

Second RS-485

PROFIBUS
(Extended
communication
module)

Note:  Possessed functions  Optional function Blank NA

2 DO(Standard)

4DI, 2DO/2RO

Modbus®-RTU
Protocol(Standard)

Modbus®-TCP,
HTTP, SMTP, SNMP,
SNTP

Modbus®-RTU
Protocol/

PROFIBUS-DP
(V0) Protocol,
according to
EN50170 standards

    

    

    

    

     

     



 

   

 

 

 

Acuvim-L

5

Chapter 2 Installation

2.1 Appearance and Dimensions

2.2 Installation Methods

2.3 Wiring

6

Considerations When Installing Meters

Acuvim-L



Installation of the meter must be performed by qualified personnel only, who
follow standard safety precautions through the installation procedures. Those
personnel should have appropriate training and experience with high voltage
devices. Appropriate safety gloves, safety glasses and protective clothing are
recommended.



During normal operation, dangerous voltage may flow through many parts of
the meter, including: terminals, any connected CTs (Current Transformers) and PTs
(Potential Transformers), all I/O (Inputs and Outputs) modules and their circuits. All
primary and secondary circuits can, at times, produce lethal voltages and currents.
AVOID contact with any current-carrying surfaces.



The meter and its I/O output channels are NOT designed as primary protection
devices and shall NOT be used for primary circuit protection or in an energy-limiting
capacity. The meter and its I/O output channels can only be used as secondary
protection. AVOID using the meter under situations where failure of the meter may
cause injury or death. AVOID using the meter for any application where risk of re
may occur.



All meter terminals should be inaccessible after installation.



Do NOT perform Dielectric (HIPOT) test to any inputs, outputs or communication
terminals. High voltage testing may damage electronic components of the meter.



Applying more than the maximum voltage the meter and/or its modules can
withstand will permanently damage the meter and/or its modules. Please refer to
the specications for all devices before applying voltages.

8

The installation method is introduced in the chapter. Please read this chapter
carefully before beginning installation .

2.1 Appearance and Dimensions

Units: mm(inches)

A

Multifunction Power Meter

-L



Acuvim-L

96.00 (3.800)

H P E V/A

96.00 (3.800)

Front View of the Display Meter and

Remote Display Unit



91.00 (3.583)

35.90

(1.413)

50.70 (1.996)

Side View of the

Display Meter





91.00 (3.583)

35.90

(1.413)

10.00

(0.394)

Side View of the Remote

Display Unit

Gasket

Gasket

91.00 (3.583)

35.90

(1.413)

50.70 (1.996)

Side View of the DIN

rail Meter

7.60 (0.300)

14.00

(0.551)



38.00 (1.496)

9

Acuvim-L





Rear View Rear View of the Remote







Display Unit

Fig.2-1 Appearance and dimensions

Part Name Description

LCD Display Large bright white backlight LCD display.



Front Casing



Key Four keys are used to select display and set.



Visible portion (for display and control) after
mounting onto a panel.

The Acuvim-L series meter enclosures is made

Enclosure



of high strength anti-combustible engineering
plastic.

DIN rail



Voltage Input Terminals Used for voltage input.



Current Input Terminals Used for current input.



Power Supply Terminals Used for aux. power supply input.



Communication Terminals Communication output.



Interface



Installation Clip Used for xing the meter to the panel.

Gasket

10

Used for Installation 35mm rail of the DIN rail
Meter.

Used for link the remote display unit and the DIN
rail meter.

Insert the gasket in between the meter and the
cutout to cover up gaps from the round hole.

Installation Clip

IO module appearance and mechanical dimensions

19.5 mm

Fig.2-2 structure conguration of IO modules

PROFIBUS module and Ethernet module appearance and mechanical dimensions

90.00

55.60

22.00

Fig.2-3 structure conguration of PROFIBUS modules

Acuvim-L

11

2.2 Installation Methods

Acuvim-L

Note

Temperature and humidity
of the environment
must accord with the
requirement of acuvim-L,
Otherwise it may cause
the meter damaged.

3. Location
Acuvim-L power meter should be installed in a dry and dust free environment.
Avoid exposing meter to excessive heat, radiation and high electrical noise
source.

Installation steps

Acuvim-L series meter can be installed into a standard ANSI C39.1 (4” round) or
an IEC 92mm DIN (square) form. 1. Cut a square or round hole on the panel of
the switch gear. The cutting size shows as Fig.2-4.

Cutting

Panel

ALUM0206

12

Environment

Please check the environmental temperature
and humidity according to Acuvim-L’s
requirement to ensure the power meter can
work well.

1. Temperature
Operation: -25°C to 70°C Storage: -40°C to 85°C

2. Humidity
5% to 95% No condensation

101.6

-0.0

+0.5

92

+0.5

92

-0.0

(3.622)

Fig.2-4 Panel cutting

Panel

(4.000)

Unit: mm (inches)

+0.5

-0.0

2. Remove the clips from the meter and put Acuvim-L into the square hole from
the front side.

Acuvim-L

Panel

ALUM0207

Fig.2-5 Put the meter into the square

Panel

3. Install the clips to the meter from backside and push the clips tightly so that
the meter is xed on the panel.

Panel

ALUM0208

Fig.2-6 Use clips to x the meter

13

Module Installation

Acuvim-L

(1) The extend module could be installed from the bottom of the meter .

(2) The extend module is xed on the meter by the screw.

(3) Please install the PROFIBUS module rst if both IO and PROFIBUS module are
selected.

(4)Please install the Ethernet module first if both IO and Ethernet module are
selected.

Fig.2-7 IO installation diagram

Note: Acuvim-DL and Acuvim-EL Power meter can connect at most one IO
module, one PROFIBUS module and one Ethernet module at the same time.

14

2.3 Wiring

2.3.1 Terminal Strips

There are three or four terminal strips at the back of the Acuvim-L series meter
depending on different models. The terminal strip diagrams are shown in
below. The three phase voltage and current are represented by using 1, 2, and 3
respectively. These numbers have the same meaning as A, B, and C or R, S, and T
used in other literature.

Current input terminal strips

I11 I12 I21 I22 I31 I32

!

1 2 3 4 5 6

Voltage input terminal strips

Power supply terminal strips

7 8 9 10

V1 V2 V3 V

13 12 11

N/- L/+

Power Supply

ALUM0209

ALUM0210

N

ALUM0211

Acuvim-L

15

Communication terminal strips Digital output terminal strips

ALUM0212

Acuvim-L

ALUM0213

16 15 14

DOC DO2 DO1

Digital Output

16 15 14

S B A

Comm Port

Fig.2-8 Terminal diagram of Acuvim-L

Note: Acuvim-AL does not have digital output and commnication terminal strips
Acuvim-BL has digital output terminal strip
Acuvim-CL/DL/EL/KL have communication terminal strip

Digital Input Digital Output Comm Port

DIC

DI3

DI4

DI2 DI1

Fig.2-9 Expansion module terminal description

DO22 DO21 DO12

DO11

B

A

S

Safety Earth Connection

Danger

Only qualified personnel
should perform the
wiring connection. Make
sure the power supply is
disconnected. Failure to

Before setting up the meter’s wiring, please
make sure that the switch gear has an earth
ground terminal. Connect both the meter and
the switch gear ground terminals together. The
following ground terminal symbol is used in this
user’s manual.

follow these instructions
may result in severe injury
or death.

16

Fig.2-10 Safety Earth Symbol

L

N

Acuvim-

L

1A FUSE

Power Supply

Ground

11

12

13

2.3.2 Power Requirement

Note

Auxiliary power

There are two Auxiliary Power Supply options for the
Make sure the power
supply voltage is
within the required
auxiliary power supply
range.

Acuvim-L series meter:

1. Standard: 100~415Vac (50/60Hz) or 100~300Vdc

2. Low Voltage DC Option: 20-60Vdc

Choose the option according to the application.

The meter’s typical power consumption is very low

and can be supplied by an independent source or by the measured load line. A
regulator or an uninterrupted power supply (UPS) should be used under high
power uctuati
13 (L, N,

on conditions. Terminals for the auxiliary power supply are 11, 12

).

The typical wiring connection is shown as Fig.2-11.

Fig.2-11 wiring connection of power supply

ALUM0214

The wire of power supply should be AWG22-16 or 0.6-1.3mm2. A fuse (typical
1A/250Vac) should be used in the auxiliary power supply loop. No.13 terminal
must be connected to the ground terminal of switchgear. An isolated
transformer or EMC filter should be used in the auxiliary power supply loop if
there is a power quality problem in the power supply.

Acuvim-L

,

17

Ground

1A FUSE

Power Supply

Acuvim-L

L

N

L

N

G

L

N

G

EMC Filter

12

13

11

Acuvim-L

ALUM0215

Fig.2-12 wiring connection of auxiliary power supply with EMC lters

Voltage input

Maximum input voltage for the Acuvim-L series meter shall not exceed
400LN/690LL VAC rms for three phase or 400LN VAC rms for single phase.
Potential Transformer (PT) must be used for high voltage systems. Typical
secondary output for PTs shall be less than or equal to 400V. Please make sure to
select an approprate PT to maintain the measurement accuracy of the meter.

A fuse (typical 1A) should be used in the voltage

Note

The secondary of PT
can not be shorted;
otherwise it may
cause severe damages
to the instrument.

Current input

Current Transformers (CTs) are required in most engineering applications.
Typical current rating for the secondary side of the CT shall be 5A (standard)
or 1A (optional, please refer to the ordering information appendix for further

18

input loop. The wire for voltage input could be
AWG16-12 or 1.3-2.0mm

2

.

Note: In no circumstance should the secondary of
the PT be shorted. The secondary the PT should be
grounded at one end.

Please refer to the wiring diagram section for further
details.

details). CTs must be used if the system rated current is over 5A. The accuracy of
the CT should be better than 0.5% with rating over 3VA is recommended in order to
preserve the meter’s accuracy. The wire between CTs and the meter shall be as short
as possible. The length of the wire may increase the error of the measurement.

The wire size of current input could be AWG15-16 or 1.5-2.5mm

2

.

Note: The secondary side of the CT should not be open circuit in any
circumstance when the power is on. There should not be any fuse or switch in
the CT loop. One end of the CT loop should be connected to the ground.

Vn connection

Vn is the reference point of the Acuvim-L voltage input. Low wire resistance
helps improve the measurement accuracy. Different system wiring modes
require different Vn connection method. Please refer to the wiring diagram
section for more details.

Three phase wiring diagram

Acuvim-L can satisfy almost all kinds of three phase wiring diagram. Please read
this section carefully before choosing the wiring diagram suitable for your power
system.

Voltage and current input wiring mode can be set separately in the meter
parameter setting process. The voltage wiring mode can be set as 3-phase 4-line
Wye(3LN), 3-phase 3-line direct connection mode(3LL), 3-phase 3-line open delta
(2LL), single-phase two-line(1LN) and single-phase three-line(1LL). The current
input wiring mode can be set as 3CT, 2CT and 1CT. Any voltage wiring setup can
be matched with any one of the current wiring setup.

Acuvim-L

19

LINE

LOAD

V1

V2

V3

V

N

Acuvim-

L

7

8

9

10

A B C N

1A FUSE

LINE

LOAD

V1

V2

V3

Acuvim-

L

7

8

9

A B C N

1A FUSE

10

V

N

2.3.3 Voltage Input Wiring

Acuvim-L

3-Phase 4-Line Wye mode (3LN)

The 3-Phase 4-Line Wye mode is popularly used in low voltage electric
distribution power system. For voltage lower than 400LN/690LL Vac, power line
can be connected directly to the meter’s voltage input port as shown in Fig.2­13a. In the high voltage input system, 3PT Wye mode is often used as in Fig.2­13b. The meter should be set to 3LN for both voltage levels.

ALUM0221

Fig.2-13a 3LN direct connection

20

Fig.2-13b 3LN connection with 3PTs

ALUM0222

LINE

LOAD

V1

V2

V3

V

N

Acuvim-L

7

8

9

10

A B C

1A FUSE

LINE

LOAD

V1

V2

V3

Acuvim-L

7

8

9

A B C

10

Vn

1A FUSE

3-Phase 3-Line direct connection mode (3LL)

In a 3-Phase 3-Line system, power line A, B and C are connected to V1, V2 and V3
directly. Vn is oated. The voltage input mode of the meter should be set to 3LL.

ALUM0223

Fig.2-14 3LL 3-phase 3-line direct connection

3-Phase 3-Line open Delta Mode (2LL)

Open delta wiring mode is often used in high voltage system. V2 and Vn
connected together in this mode. The voltage input mode of the meter should
be set to 2LL for this voltage input wiring mode.

ALUM0224

Fig.2-15 2LL with 2PTs

Acuvim-L

21

LINE

LOAD

A B C

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

LINE

LOAD

A B C

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

2.3.4 Current Input Wiring

3CT

Acuvim-L

The 3CT current wiring configuration can be used when either 3CTs are
connected (as shown in Fig.2-16) or 2CTs are connected (as shown in Fig.2-17)
to the system. In either case, there is current owing through all three current
terminals.

ALUM0225

Fig.2-16 3CT-a

22

Fig.2-17 3CT-b

ALUM0226

LINE

LOAD

A B C

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

LINE

LOAD

A B C

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

2CT

The difference between Fig.2-17 and Fig.2-18 is that no current flows through
current input terminal I21 and I22. The I2 value is calculated from formula
i1+i2+i3=0. The current input mode of the meter should be set to 2CT .

ALUM0227

Fig.2-18 2CT

1CT

The current input mode o f the meter should be set to 1CT

N

Fig.2-19 1CT

ALUM0228

Acuvim-L

23

N

LINE

LOAD

ABC

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

78

9

10

1A FUSE

V

N

2.3.5 Frequently used wiring method

In this section, most common voltage and current wiring connection

Acuvim-L

combinations are put together into different diagrams. In order to display
measurement readings correctly, please select the approprate wiring diagram
according your setup and application.

Note: Acuvim-L supports 3LN-3CT(Using the 3CT and a 2CT two wiring), 3LL-3CT,
2LL-3CT, 2LL-2CT, 1LL-2CT and 1LN-1CT.

1. 3LN, 3CT with 3 CTs (Wiring mode: 3LN, 3CT)

ALUM0229

Fig.2-20 3LN, 3CT with 3CTs

24

2. 3LN, 3CT with 2 CTs (Wiring mode: 3LN,3CT)

N

LINE

LOAD

ABC

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

V

N

78

9

10

1A FUSE

Fig.2-21 3LN, 3CT with 2CTs

3. 3LL,3CT(Wiring mode:3LL,3CT)

LINE

A B C

1A FUSE

Acuvim-L

ALUM0230

Terminal block

I11

VN V3 V2 V1

I12

I21

Acuvim-L

I22

I31

I32

LOAD

Fig.2-22 3LL, 3CT

ALUM0231

25

LOAD

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

V

N

78

9

10

1A FUSE

LINE

ABC

LOAD

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

V

N

78

910

1A FUSE

LINE

ABC

4. 2LL, 3CT (Wiring mode: 2LL, 3CT)

Acuvim-L

5. 2LL, 2CT (Wiring mode: 2LL, 2CT)

ALUM0232

Fig.2-23 2LL, 3CT

26

Fig.2-24 2LL, 2CT

ALUM0233

6.1LN, 1CT(Wiring mode:1LN, 1CT)

N

LINE

LOAD

A

I11

Acuvim-L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

V

N

78

9

10

1A FUSE

N

LINE

LOAD

A

I11

Acuvim-

L

5

7

9

I32

8

6

I12

I21

I22

I31

6

Terminal block

1

2

3

4

5

V1V2

V3

V

N

78

9

10

1A FUSE

B

Acuvim-L

ALUM0234

Fig.2-25 1LN,1CT

7. 1LL, 2CT(Wiring mode:1LL, 2CT)

ALUM0235

Note: For the 1LL, 2CT, A and B facies of the phase Angle is 1800.

Fig.2-26 1LL,2CT

27

DO1

VCC

External
Power Supply

OUT

Photo-MOS

Acuvim-L

AC/DC

DOC

J

2.3.6 Digital Output (DO)

There are two digital outputs for Acuvim-L. For the Acuvim-BL, the terminals of

Acuvim-L

the digital output are DO1 , DO2 and DOC . For the Acuvim-DL/EL, the terminals
of the digital output respectively is DO11, DO12 and DO21, DO22.These two
digital outputs can be used as energy pulse output or over/under limit alarming
output.

Digital output circuit form is Photo-MOS. The simplied circuit is as below:

ALUM0236

Fig.2-27 Digital output circuit

The max output voltage and current are 250Vac/300Vdc and 100mA.

When the digital output is used as over/under limit alarming output, the upper
and lower limit of the parameter, time interval and output port can be set from
the meter front.

2.3.7 Digital Input(DI)

There are 4 dry-contact digital input in extension modules respectively. The
digital input circuit can be used to detect remote signals, or be used as a counter
of input pulses.

28

Photo-MOS

circuit

Fig.2-28 DI input circuit diagram

The circuit drawing of digital input is simplied as g.2-28. When K is switched
o, OUT is in high state. When K is switched on, OUT is in low state. The wire of
digital input should be chosen between AWG22~16 or 0.5~1.3mm

2

.

2.3.8 Communication

Acuvim-L series meter uses RS485 serial communication and the Modbus­RTU protocol. The terminals of communication are A, B, and S (14, 15 and 16).
A is dierential signal +, B is dierential signal - and S is connected to the shield
of twisted pair cable. Up to 32 devices can be connected on a RS485 bus. Use
good quality shielded twisted pair cable, AWG22 (0.5mm2) or larger. The overall
length of the RS485 cable connecting all devices can not exceed 1200m (4000ft).
Acuvim-L series meter can be used as a slave device of a master device such as
PC, PLC, Data Collector and RTU.

If the master does not have RS485 communication port, a converter(such as a
RS232/RS485 or a USB/RS485 converter) will be required. Typical RS485 network
topologies include line, circle and star (wye).

Data transfer format is start bit + 8 data bits + parity + stop bit. NON1, NON2, odd
and EVEN could be selected in the mode of parity. NON1 represents non-parity,
single stop bit; NON2 represents non-parity, double stop bit; odd represents odd­parity, single stop bit; EVEN represents EVEN-parity, single stop bit.

Acuvim-L

29

All meter have been standardized. In order to improve the quality of
communications, now oers the following Suggestions:

Acuvim-L

The shield of the RS485 cable must be connected to the ground at one end
only. Every A(+) should be connected to A(+), B(-) to B(-), or it will inuence the
network, even damage the communication interface.

“T” type connection topology should be avoided. This means no new branches
except from the starting point.
Keep communication cables away as much as possible from sources of electrical
noise. When several devices are connected (daisy chain) to the same long
communication line, an anti signal reecting resistor (typical value 120- 300/

0.25W) is often used at the end of the circuit ( the last meter of the chain)
if the communication quality is distorted.

Use RS232/RS485 or USB/RS485 converter with optical isolated output and surge
protection.

30

Chapter 3 Meter Operation and

Parameter Setting

3.1 Display Panel and Keys

3.2 Metering Data

3.3 Statistics Display

3.4 System Parameter Setting

3.5 DO Parameter Setting and Expansion Module Setting

3.6 Ethernet Network Module Settings

3.7 DI Status Display

3.8 TOU Energy and Maximum Demand Display

3.9 Measurement Methods and Parameters Denitations

Operational details of the meter will be described in this chapter. This includes

Acuvim-L

viewing real-time metering data and setting parameters using different key

combination.

3.1 Display Panel and Keys

The front of the Acuvim-L series meter consists of an LCD screen and four control
keys. All display segments are shown as Fig.3-1 below:

8

7

3

4

5

6

9

ALUM0301

32

Fig.3-1 All display segments

12

10

SN display Description

Three lines of "

1

in the metering area

Status display area

2

One line of"
the top of display panel

3 Item icon

4 3-phase unbalance

5 Load nature

6 Energy icon

Communication indicator

7

Energy pulse
output indicator

8

" digits at

.

9 Time icon

10 Unit

" digits

Display metering data
Voltage, current, power, power factor, THD,
frequency, demand, unbalance factor, max, min etc.

Display current status
Meter: metering status; Max: maximum value; Min:
minimum value; THD: display Har: display individual
harmonic for voltage and current.

Item icon
U: voltage; I: current, P: active power; q: reactive
power; PF: power factor; when displaying harmonic
content, the little "8" digits show the harmonic order.

Unbalance icon

: inductive load;
: capacitive load.

Imp: import energy; exp: export energy

No icon: no communication
With icon: communication

No icon: no pulse output
With icon: pulse output

With icon: display running time
Indicate data unit

Voltage: V, kV, Current: kA, A, Power: kW and MW,
Reactive Power: kvar and Mvar, Apparent Power:
kVA and MVA, Frequency: Hz, Energy: kWh, Reactive
Power: kvarh, Percentage: %

There are four dedicated keys on the front panel, labeled H, P, E and V/A from left
to right. Use these four keys to read metering data and set the parameters.

Note: If the LCD backlight is o, press any key one time to bring the backlight on

Acuvim-L

33

3.2 Metering Data

Acuvim-L

Acuvim-L series meter displays the voltage metering screen (default screen)
when rst powered up. Dierent key combinations show dierent screen. Press
“V/A” to show real-time metering data; press “E” to show energy parameters; press
“P” to show power parameters; press “H” to show power quality information; press
“H” and “E” together simultaneously to show max/min information, unbalance
and individual harmonics.

press“H” and “V/A” together simultaneously to show basic parameter setting.
press“P” and “V/A” together simultaneously to show DI Status. press“E” and “V/A”
together simultaneously to show TOU Energy.

Note: No harmonic contents will be displayed in Acuvim-EL and Acuvim-KL.

Press “V/A” to read voltage and current in the metering area. The screen will
proceed to the next display as you press “V/A” each time. It will go back to the
rst screen if you press “V/A” at the last screen.

st

The 1

screen: Voltage for each phase: U1, U2 and
U3. As shown in Fig.3-2, U1=380.2 V, U2=380.0 V,
U3=379.8 V.

Load nature is inductive, and communication
status is good.

ALUM0302

Fig.3-2 Three phase voltage

Note: Since load nature and communication
status belong to system information, the icons
are displayed on every screen.

34

Press “V/A” to go to the next screen.

nd

The 2

screen: Line to line voltage: U12, U23
and U31. As shown in Fig.3-3, U12=658.5 V,
U23=658.0 V, U31=657.8 V.

ALUM0303

Fig.3-3 Three phase voltage

Press “V/A” to go to the next screen.

rd

The 3

screen: Current for each phase: I1, I2 and
I3. As shown in Fig. 3-4, I1=2.501 A, I2=2.500 A,
I3=2.499 A.

Press “V/A” to go to the next screen.

ALUM0304

Fig.3-4 Three phase current

th

The 4

screen: Neutral current. As shown in

Fig.3-5, In=0.000 A.

Press “V/A” to go to the next screen.

ALUM0305

Fig.3-5 Neutral current

Acuvim-L

35

Acuvim-L

The 5th screen: Current demand of each phase.

As shown in Fig.3-6, Dmd_I1=2.503 A, Dmd_

I2=2.501 A, Dmd_I3=2.500 A.

Press “V/A” to go back to the 1st screen.

ALUM0306

Fig.3-6 Demand current

Note: For Acuvim-KL, only the current page is displayed. When the wiring mode
is set to 3LL-3CT,2LL-3CT or 2LL-2CT, it will not display phase voltage and neutral
current , there is no the 1
2CT,it only shows Uab of 2
1LL-1CT, it only shows Ua of 1
and neutral current, there is no the 2

st

and 4th screen. When the wiring mode is set to 1LL-

nd

screen, Ia and Ib of 3rd screen. When the wiring is

st

screen and Ia of 3rd screen, not display line voltage

nd

and 4th screen.

Press “P” to display power related parameters.

st

The 1

screen: Power of each phase.

As shown in Fig.3-7, P1=0.475 kW, P2=0.475 kW,
P3=0.474 kW.

Inductive load, communication status is good.

Press “P” to go to the next screen.

ALUM0307

Fig.3-7 Three phase power

36

ALUM0308

Fig.3-8 Three phase reactive power

ALUM0364

Fig.3-9 Three phase apparent power

ALUM0309

Fig.3-10 System total power

nd

The 2

screen: Reactive power of each phase.

As shown in Fig.3-8, Q1=0.823 kvar, Q2=0.823
kvar,Q3=0.822 kvar.

Press “P”, go to the next screen.

rd

screen: Apparent power of each phase.

The 3

As shown in Fig.3-9, S1=0.950 kVA,

S2=0.951 kVA,S3=0.950 kVA.

Press “P” to go to the next screen.

th

The 4

screen: System total power, reactive power
and apparent power.
As shown in Fig.3-10, Psum=1.426 kW,
Qsum=2.471 kvar, Ssum=2.853 kVA.
Press “P” to go to the next screen.

Acuvim-L

37

Acuvim-L

ALUM0310

Fig.3-11 Three phase power factor

The 5th screen: Power factor of each phase:
PF1,PF2, PF3.

As shown in Fig.3-11, PF1=0.500, PF2=0.499,

PF3=0.500.

Press “P” to go to the next screen.

th

The 6

screen: System average power factor PF

and system frequency F.

As shown in Fig.3-12, PF=0.500, F=50.01 Hz.

Press “P” to go to the next screen.

ALUM0311

Fig.3-12 Power factor and

frequency

th

The 7

screen: System power demand Dmd_

P, reactive power demand Dmd_Q and apparent

power demand Dmd_S.

As shown in Fig.3-13, Dmd_P=1.425 kW, Dmd_

Q=2.472 kvar, Dmd_S = 2.850 kVA.

ALUM0312

Fig.3-13 System power demand

2LL-2CT, it will not show single-phase active power of 1
reactive power of 2
factor of 5

38

th

nd

, single-phase apparent power of 3rd and single-phasepower

.

Press “P” to go to the next screen.

Note: For Acuvim-KL,only display system power,
When the wiring is set to 3LL-3CT, 2LL-3CT and

st

, two single-phase

For other series meters, if the wiring is set to 2LL, or 3LL, there is no single-phase
power and single-phase power factor displayed, press P to switch between
screens only 4,6,7.

st

The 1

screen: Import energy

As shown in Fig. 3-14, Ep_imp=50.9 kWh.

Press “E”, go to the next screen.

ALUM0313

Fig.3-14 Import energy

nd

The 2

screen: Export energy.

As shown in Fig. 3-15, Ep_exp=1.8 kWh.

Press “E”, go to the next screen.

ALUM0314

Fig.3-15 Export energy

rd

screen: Inductive (import) reactive energy.

The 3

As shown in Fig. 3-16, Eq_imp=3.9 kvarh.

Press “E” to go to the next screen.

ALUM0315

Fig.3-16 Import reactive energy

Acuvim-L

39

Acuvim-L

ALUM0316

ALUM0317

Fig.3-17 Export reactive energy

Fig.3-18 Apparent energy

ALUM0318

Fig.3-19 Run hours

The 4th screen: Capactive (export) reactive energy.

As shown in Fig. 3-17, Eq_exp=1.5 kvarh.

Press “E” to go to the next screen.

th

screen: Apparent energy.

The 5

As shown in Fig.3-18, Es = 3.0kVAh.

Press “E” to go to the next screen.

th

screen: Run hours.

The 6

As shown in Fig.3-19, Run_Hour=12.3 hours.

Press “E” to go to the next screen.

40

The 7th screen: Load Run hours.

As shown in Fig.3-20, Load Run hour = 1.3 hours.

Press “E” to go to the next screen.

Note: This screen only applies to Acuvim-DL, EL
and KL.

Fig.3-20 Load Run hours

Note: In real-time metering mode, Acuvim-AL,
Acuvim-BL, Acuvim-CL,Acuvim-DL and Acuvim-EL display voltage and current
THD when “H” is pressed.

st

The 1

screen: Voltage THD.

When voltage wiring mode is set to 3LN ,display
shows phase voltage THD: THD_U1, THD_U2,
THD_U3.

As shown in Fig. 3-21, THD_U1=2.32%, THD_

ALUM0319

Fig.3-21 Phase voltage THD

U2=2.35%, THD_U3=2.28%.

When voltage wiring mode is set to 2LL or 3LL,

display shows line to line voltage THD: THD_U12,THD_U23, THD_U31.

As shown in Fig.3-22, THD_U12=2.30%,

THD_U23=2.28%, THD_U31=2.25%.

When voltage wiring mode is set 1LN, display
only shows phase voltage THD: THD-U1. When
voltage wiring mode is set 1LL, display only
shows phase voltage THD: THD-U1 and THD-U2.

ALUM0320

Fig.3-22 Line to line voltage THD

Press “H” to go to the next screen.

Acuvim-L

41

Acuvim-L

The 2nd screen: Phase current THD: THD_I1, THD_
I2, THD_I3.

As shown in Fig 3-23, THD of three phase current,
THD_I1=1.89%, THD_I2=1.83%, THD_I3=1.85%.

ALUM0321

Fig.3-23 Current THD

Press “H” key, go back to the 1

Note: When voltage wiring mode is set to 1LN,

st

screen.

display only shows phase current THD: THD-I1. When voltage wiring mode is set
to 1LL, display only shows phase current THD: THD-I1 and THD-I2.

3.3 Statistics Display

For Acuvim-AL,BL,CL,DL,ELPress “H” and “E” simultaneously to enter the statistic
display mode. Maximum and minimum value for metering parameters are
demand, voltage and current unbalance factor, and individual voltage and
current harmonic. Press “H” and “E” simultaneously again to exit to the real-time
metering mode.

Note: Acuvim-EL and Acuvim-KL will not show harmonic contents.

3.3.1 Display Max and Min of the voltage and current and Peak Demandof
current .(AL, BL, CL, DL, EL)

Press “V/A” key under the statistics display mode
to display the Min and Max value of voltage,
current and current demand.

st

The 1

screen: Max value of phase voltage. The

“Max” icon is shown on the top of screen.

ALUM0322

Fig.3-24 Max value of phase voltage

42

As shown in Fig. 3-24, U1_MAX=380.3 V, U2_

MAX=380.2 V, U3_MAX=380.5 V.

ALUM0323

Fig.3-25 Min value of phase voltage

ALUM0324

Fig.3-26 Max value of line to line

ALUM0325

voltage

Fig.3-27 Min value of line to

line voltage

nd

The 2

screen: MIN value of phase voltage. The

“MIN” icon shown on the top of screen.

As shown in Fig.3-25, U1_MIN=379.6 V,
U2_MIN=379.8 V, U3_MIN=379.7 V.

Press “V/A” to go to the next screen.

rd

The 3

screen: Max value of line to line voltage.

As shown in Fig 3-26, U12_MAX=658.6 V,
U23_MAX=658.3 V, U31_MAX=658.3 V.

Press “V/A” to go to the next screen.

th

The 4

screen: MIN value of line to line voltage.

As shown in Fig.3-27, U12_MIN=657.8 V,
U23_MIN=657.7 V, U31_MIN=657.6 V.

Press “V/A” to go to the next screen.

Acuvim-L

43

Acuvim-L

The 5th screen: MAX value of current.

As shown in Fig.3-28, I1_MAX=2.502 A ,
I2_MAX=2.503 A, I3_MAX=2.502 A .

Press “V/A” to go to the next screen.

ALUM0326

Fig.3-28 Max value of current

th

The 6

screen: MIN value of current.

As shown in Fig.3-29, I1_MIN=2.498 A,

I2_MIN=2.496 A, I3_MIN=2.497 A.

ALUM0327

Fig.3-29 Min value of current

Press “V/A” to go to the next screen.

th

The 7

screen: Peak current demand.

As shown in Fig 3-30, I1_Demand_MAX=2.505
A, I2_Demand_MAX=2.504 A, I3_Demand_
MAX=2.504 A.

ALUM0328

Fig.3-30 Peak current demand

When voltage wiring mode is set to 1LL, display only shows first and second
line line of 1

st

, 2nd, 5th, 6th and 7th screen,and rst line of 3rd and 4th. When voltage

wiring mode is set to 2LL or 3LL, display doesn’t show the 1

When voltage wiring mode is set to1LN, display

only shows rst line of 1

st

, 2nd, 5th, 6

st

and 2nd screen.

Press “ V/A” to go back to the rst screen.

th

and 7th screen.

44

3.3.2 Display the Max value of power and reactive power demand.

Press “P” under the statistics display mode to display the peak value for power,
reactive power and apparent power demand.

As shown in Fig.3-31, P_Demand_MAX=1.435 kW,
Q_Demand_MAX=2.478 kvar, S_Demand_MAX =

2.850 kVA.

Fig.3-31maximum system power demand

3.3.3 Display power quality parameter(AL, BL, CL, DL, EL)

When press “H” under statistic display mode, will display voltage and current
unbalance factor as well as individual voltage and current harmonic content

st

The 1

screen: Unbalance factor for voltage and

current.

As shown in Fig.3-32, voltage unbalance
factor=0.3%, current unbalance factor=0.5%.

Press “H” to go to the next screen.

ALUM0330

Fig.3-32 Unbalance factor for voltage and

starting from the 2

current

nd

harmonic of voltage to the 15th harmonic of current as you

Press “H” key to display voltage and current
harmonic content. The HAR icon will be shown
on the top of the screen. The sequence will roll

press “H” each time. The following shows the display for phase voltage, line to
line voltage and current harmonic contents.

Acuvim-L

45

The 2nd screen: 2nd harmonic content of voltage.

Acuvim-L

As shown in Fig.3-33, U1_Hr2=0.12%,

U2_Hr2=0.14% , U3_Hr2=0.12%.

rd

to the 31th phase

ALUM0331

Fig.3-33 2nd harmonic content of phase

voltage

Press H to scroll through the 3
voltage harmonic content

Note: When voltage wiring of the meter is set to 2LL
or 3LL, line to line voltage harmonic contents will be

display instead (as shown in Fig. 3-34).

nd

The 2

screen: 2nd harmonic content of line to line

voltage.

As shown in Fig.3-34, U12_Hr2=0.12%, U23_

ALUM0332

Fig.3-34 2nd harmonic content of line to

line voltage

Hr2=0.14% , U31_Hr2=0.12%.

Press H to scroll through the 3

rd

voltage harmonic content.

th

The 33

screen: 2nd harmonic content of current.

to the 31th line to line

As shown in Fig.3-35, I1_Hr2=3.08%, I2_Hr2=3.05%,
I3_Hr2=3.01%.

Press “H” key to scroll through the 3

ALUM0333

Fig.3-35 2nd harmonic content of current

current harmonic content.

In the statistic mode, press “H” and “E” simutaneously
to exit this mode.

Note: When voltage wiring mode is set to 1LL, the screen only shows the rst line

and the second line; when set to 1LN, this screen only displays the rst line.

46

rd

to the 31th

3.4 System Parameter Setting

Press “H” and “V/A” simultaneously in the metering data display mode to enter
the system parameter setting mode. All the settings can be done through the
keys on the meter front panel.

Press “H” to move the flashing cursor to the right, press “P” to increase the
number by 1 once a time, press “E” to decrease the number by 1 once a time,
press “V/A” to accept the change and move to the next screen. Press “H” and “V/
A” simultaneously to exit system parameter setting mode and return to real-time
metering mode.

Note

After settings have
been modified for the
current page, press V/
A to store the current
value. Exiting the setting
mode by pressing H and
V/A simultaneously will
discard any changes made
to the current page.

System parameter setting mode is password protected, a four digit password
(select from 0000 to 9999) is required everytime before accessing the system
parameter settings . The default password is 0000. After entering the password,
press “V/A” to accept the password and proceed . The meter will return to the
real-time metering mode if a wrong password is entered

ALUM0334

Fig.3-36 Password input page

Acuvim-L

47

The 1st screen: Communication Address setting.

Acuvim-L

The address can be any integer between 1 - 247.

As shown in Fig.3-37, the communication address is 1.

To change the address, press “H” to move the

cursor, press “P” to increase value by 1, press “E”

ALUM0335

Fig.3-37 Communication address setting

to decrease value by 1. Press “V/A” to store the

current address and go to the next setting screen.
Press “V/A” to proceed to the next screen if there is
no need to change the address.

Note: Meters can not have the same communication address on the same RS485
communication line according to the Modbus-RTU protocol.

nd

The 2

screen: Baud rate setting.

The asynchronous communication setting of
Acuvim-L is 8 bit, parity, 1 start bit and 1 or 2 stop
bit. Baud rate can be set as follows: 1200, 2400,
4800, 9600, 19200, 38400, 57600. Press “P” or “E” to

ALUM0336

Fig.3-38 Baud rate setting

select a suitable baud rate. Press “V/A” to accept
the change and proceed to the next screen. Same

baud rate should be used for all meter connecting
on the same communication line.

rd

The 3

screen: communication check setting.
communication check could be one of four
settings: non1, non2, odd, EVEN. As shown in
Fig.3-39: communication check is set to non1.

Press “P”or”E”to select a communication check

ALUM0337

Fig.3-39 communication check

48

setting

mode, press “V/A” to accept the change and
processed to the next page.

Note: The page is only shown in Acuvim-EL and KL. “non1” represents non-parity,
single stop bit; “non2” represents non-parity, double stop bit; “odd” represents
odd-parity, single stop-bit; “EVEN” represents even parity, single stop bit. By
default it is set as “EVEN”.

th

The 4

screen: Voltage input wiring setting.
Voltage input could be one of ve setting:3LN,
3LL, 2LL, 1LL, 1LN.

As shown in Fig.3-40: voltage input mode is set to
3LN.

ALUM0337

Fig.3-40 Voltage input wiring setting

Press “P” or “E” to select a wiring mode, press “V/A” to
accept the change and proceed to the next page.

th

The 5

screen: Current input wiring setting.

Current wiring mode can be one of the three
settings: 3CT, 2CT, 1CT. As shown in Fig.3-41,
current input mode is set to 3CT

ALUM0338

Fig.3-41 Current input wiring setting

Press “P” or “E” to select a wiring mode, press “V/
A” to accept the change and proceed to the next
page.

th

The 6

screen: PT primary side ratio setting.

PT1 ratio can be set from 50.0 to 1,000,000.0 (unit
in V)

As shown in Fig.3-42, PT1=380.0V.

ALUM0339

Fig.3-42 PT primary side ratio setting

To change PT1 value, press “H” to move the
cursor, press “P” to increase value by 1, press “E”

to decrease value by 1. Press “V/A” to store the
current value and proceed to the next screen.

Acuvim-L

49

The 7th screen: PT secondary side ratio setting.

Acuvim-L

PT2 ratio can be set from 50.0 to 400.0 (unit in V).

As shown in Fig.3-43, PT2=380.0V.

To change PT2 value, press “H” to move the

ALUM0340

Fig.3-43 PT secondary side ratio setting

cursor, press “P” to increase value by 1, press “E”

to decrease value by 1. Press “V/A” to store the
current value and proceed to the next screen.

Note: If no PT is installed at the voltage input, PT1 and PT2 should be the same
and equal to the input rated voltage.

th

The 8

screen: CT primary side ratio setting.

CT1 ratio can be set from 5 to 50000 (unit in A). For
a 1A option meter, CT1 can be set from 1 to 50000
(unit in A).

ALUM0341

Fig.3-44 CT primary side ratio setting

As shown in Fig.3-44, CT1=5A.

To change CT1 value, press “H” to move the cursor,
press “P” to increase value by 1, press “E” to decrease
value by 1. Press “V/A” to store the current value and
proceed to the next screen.

Note: CT1 has two digit lines representing one gure. For example, if CT primary
is 200, CT1 should be programmed as 0020 for the top line, and 0 for the bottom
line, so that it is read as 200.

50

ALUM0342

Fig.3-45 CT secondary side ratio setting

ALUM0343

Fig.3-46 Denition of reactive power

ALUM0344

Fig.3-47 Backlight “ON” time setting

The 9th screen: CT secondary side ratio setting.

CT2 can be 1, 5 and 333; user can modify the CT2 as
1 or 5, if CT2=333mv, it can not be modied.

As shown in Fig.3-45, CT1=5A, Press “V/A” to
proceed to the next page.

th

The 10

screen: Denition of reactive power.

0: sinusoidal reactive power;

1: budeanu’s reactive power.

Please refer to Chapter 3.6 <<Measurement
methods and parameter denitations>> for details.

th

The 11

screen: Backlight “ON” time setting.

The “ON” time can be set from 0 to 120 minute.

The LCD screen backlight will always be “ON” if
the setting value is 0. The backlight will turn “OFF”
afterinactive for a period of time if other value
(from 1to 120) is set.

As shown in Fig.3-47, the setting time of the
backlight is 2 minutes. The backlight will
automatically turn “OFF” if no key activation within
2 minutes.

Acuvim-L

51

Acuvim-L

ALUM0345

Fig.3-48 Sliding windows time for

demand setting

ALUM0346

Fig.3-49 Clear Max and Min page setting

ALUM0347

Fig.3-50 Clear energy enable setting

The 12th screen: Sliding windows time for demand
setting.

Sliding windows time of demand can be set from

1-30 minute. The window slides once per minute.

As shown in Fig.3-48, the sliding windows time is

8 minute.

th

The 13

screen: Clear Max and Min page setting.

To clear Max and Min values do not mean writing
0 to all of the registers. Meter’s current metering
values will be copied to the statistic registers
instead and start a new statistic period.

Press “P” or “E” to select “YES” or “NO”:

“YES”: clear Max and Min;
“NO”: do not clear Max and Min.
Press “V/A” accept selection and proceed to the
next page.

th

The 14

screen: Clear energy enable setting page.

This screen enables the energy reset function of
the meter.

1: enable; 0: disable.

52

The 15th screen: Acknowledgement to clear energy
setting.

This screen appears only when the 14

th

screen is set

as “enable”.

ALUM0348

Fig.3-51 Acknowledgement to clear

energy setting

Press “E” or “P” to select “YES” or “NO ”:

“YES”: clear energy;
“NO”: do not clear energy.

All energy parameters will be set to 0 when “YES” is selected. Press “V/A” to accept
selection and proceed to the next page.

th

The 16

screen: Clear running time setting.

Press “P” or “E” to select “YES” or “NO”:
“Yes”: clear running time;
“No”: do not clear running time.

Running time will be set to 0 when “YES” is selected.

ALUM0349

Fig.3-52 Clear running time setting

Press “V/A” to accept selection and proceed to the

next page.

th

The 17

screen: Clear load running time setting.
the page would display. Press “P” or “E” to select
“YES” or “NO”: “Yes”: clear running time. “No”: do
not clear running time.Running time will be set
to 0 when “YES” is selected. Press”V/A” to accept
selection and proceed to next page.

Fig.3-53 Clear load running time setting

Acuvim-L

53

Acuvim-L

The 18th screen: VAR/PF setting. Press “P” or “E” to
change VAR/PF setting.

As shown in Fig.3-54 is IEC standard.

Note: The page would be show only in Acuvim-EL.

Fig.3-54 VAR/PF setting

The 19

th

screen: Password setting. This is the
last screen in system parameter setting mode.
The password can be changed in this page. It is
important to remember the new password.

As shown in Fig.3-55, the password is 0001. Press

ALUM0350

Fig.3-55 Password setting

“V/A” to store the new password and return to the
rst setting page. Press “H” and “V/A” together to
exit the system setting mode after nishing all of
the settings.

3.5 DO Parameter Setting and Expansion Module Setting(BL, DL, EL)

Acuvim-BL meter has two digital outputs. Each can operate as energy pulse
output or alarm output. All DO parameters can be set from the meter front. To
distinguish with system parameter setting mode, we call this setting mode as DO
parameter setting mode.
Press “P” key and “E” key simutaneously under system parameter setting mode to
enter DO parameter setting mode. Press “H” to move the ashing cursor to the
right, press “P” to increase the number by 1 once a time, press “E” to decrease the
number by 1 once a time, press “V/A” to accept the change and move to the next
screen. Press “P” and “E” simultaneously to exit DO parameter setting mode and
return to system parameter setting mode.

54

If the extend IO module could be added, it contains 2 DO, 4 DI and
communication with Modbus-RTU standard. Press “P” key and “E” key
simutaneously under system parameter setting mode to enter DO parameter
setting and Extend IO communication setting mode, the operation about key is
same as Acuvim-BL DO setting.The following steps show how to set DO items:

st

The 1

screen: Extend IO baud rate setting.

Extend IO Baud rate can be set as follows: 1200,
2400,4800, 9600, 19200, 38400, 57600. Press “P”
or “E” to select a suitable baud rate. Press “V/A” to
accept the change and proceed to the next screen.

ALUM0350

Fig.3-56 Extend IO baud rate setting

Same baud rate should be used for all meters
connecting on the same communication line.

Note: The page would be shown only in Acuvim­DL and Acuvim-EL.

nd

The 2

screen: Extend IO communication check

setting. Extend IO communication check could
be one of four settings: NON1,NON2,odd,EVEN.
As shown in Fig.3-57: Extend IO communication
check is set to NON1.

ALUM0351

Fig.3-57 Extend IO communication check

setting

Press “P”or”E”to select a communication check

mode, press “V/A” to accept the change and
processed to the next page.

Note: The page would be shown only in Acuvim­EL.

Acuvim-L

55

Acuvim-L

ALUM0351

Fig.3-58 DO1 output mode setting

ALUM0352

Fig.3-59 DO2 output mode setting

ALUM0353

Fig.3-60 DO pulse constant rate setting

The 3th screen: DO1 output mode setting.

0: pulse output; 1: alarm output. As shown in Fig.3­58, DO1 is set as pulse output mode.

Press “V/A” to accept change and proceed to the
next page.

th

The 4

screen: DO2 output mode setting.

0: pulse output; 1: alarm output. As shown in Fig.3­59, DO2 is set as alarm output mode.

Press “V/A” to accept change and proceed to the
next page

th

The 5

screen: DO pulse constant rate setting.

Pulse constant can be set from any interger from
800 to 60000.

As shown in Fig.3-60, pulse constant is
800(meaning 800 pulse for every 1kWh or 1kvarh).

Press “V/A” to accept change and proceed to the

next page

56

The 6th screen: DO pulse width setting.

DO pulse width can be set from any integer from
1 to 50. Each unit stands for 20ms.

As shown in Fig.3-61, the pulse width is set to 5,

ALUM0354

Fig.3-61 DO pulse width setting

that is 5×20=100ms.

Press “V/A” to accept change and proceed to the
next page.

th

The7

screen: DO1 output item setting.

The DO1 output can be one of the following
energy items shown in table below:

Press “V/A” to accept change and proceed to the
next page.

ALUM0355

Fig.3-62 DO1 output items setting

Item value 0 1 2 3 4

Energy select No output Ep_imp Ep_exp Eq_imp Eq_exp

th

The 8

screen: DO2 output item setting.

Same as DO1 output item setting, refer to the
energy item selection table shown above.

DO1 and DO2 settings are independent of each
other.

ALUM0356

Fig.3-63 DO2 output item setting

Press V/A key for acknowledgement and go to the
next page.

Acuvim-L

57

Acuvim-L

ALUM0357

Fig.3-64 DO delay time for alarm setting

ALUM0358

Fig.3-65 DO1 alarm output items setting

Var 0 1 2 3 4 5 6 7 8

Item Hz V1 V2 V3 V12 V23 V31 I1 I2

Var 9 10 11 12 13 14 15 16 17

Item I3 In P1 P2 P3 Psum Q1 Q2 Q3

Var 18 19 20 21 22 23 24 25 26

Item Qsum Ssum PF1 PF2 PF3 PFsum

Var 27 28 29 30 31 32 33 34

Dmd_Q Dmd_I1 Dmd_I2 Dmd_I3 S1 S2 S3 Dmd_S

Item

The 9th screen: DO delay time for alarm setting.

If alarm condition lasts for over the preset time
period, the alarm signal will be triggered. The
delay time can be set from any integer from 0 to

255. Each unit stands for 300ms.

th

The10

screen: DO1 alarm output item setting.

The DO1 alarm output can be one of the following
energy items shown in table below:

As shown in Fig.3-65, DO1 alarm parameter is 06,
tracking object is V31

Press “V/A” to accept change and proceed to the

next page.

U_unbl I_unbl Dmd_P

58

ALUM0359

Fig.3-66 DO1 inequality sign setting

ALUM0360

Fig.3-67 DO1 alarm limit setting

ALUM0361

Fig.3-68 DO2 alarm output item setting

The 11th screen: DO1 inequality sign setting.

0: < (less than); 1: > (greater than)

As shown in Fig.3-66, the inequality sign is set to 1,
which means when the tracking value is above the
preset limit, an alarm output will be triggered.

Press “V/A” to accept change and proceed to the
next page.

th

The 12

screen: DO1 alarm limit setting.

Set the alarming limit value for the tracking
parameter.

As shown in Fig.3-67, the DO1 limit is set to 1800.
Refer to Chapter 3.8 << Measurement Methods
and Parameter Definitations>> for alarm limit

value setting details.

Press “V/A” to accept change and proceed to the
next page.

th

The 13

screen: DO2 alarm output item setting.

Same as DO1 alarm output item setting, refer
to the alarm output item selection table shown
above.

As shown in Fig.3-68, DO2 alarm parameter is 08,
tracking object is Phase 2 current.

Press “V/A” to accept change and proceed to the

next page.

Acuvim-L

59

Acuvim-L

ALUM0362

Fig.3-69 DO2 inequality sign setting

ALUM0363

Fig.3-70 DO2 alarm limit setting

ALUM0364

Fig.3-71 alarm back light blink setting

The 14th screen: DO2 inequality sign setting.

0: < (less than); 1: > (greater than)

Press “V/A” to accept change and proceed to the
next page.

th

The 15

screen: DO2 alarm limit setting.

Set the alarming limit value for the tracking
parameter.

Refer to Chapter 3.8 << Measurement Methods
and Parameter Definitations>> for alarm limit
value setting details.

As shown in Fig.3-70, the DO2 limit is set to 4500.
This is the last screen of DO parameter setting.

th

The 16

screen: backlight blinking setting. If the
alarm backlight blinking is enabled, the screen
displays “1”. As show in Fig.3-71, the backlight
blinkingis enabled. Under this circumstance, when
an alarm is triggered, the backlight will be blinking
at the same time. Press “P” or “E” to choose between
“0” and “1”.

60

The 17th screen: PROFIBUS address setting page.

PROFIBUS address can be set from 0~126, this
page will display if the power meter connect a
PROFIBUS module.

ALUM0365

Fig.3-72 PROFIBUS address setting

PROFIBUS address can be set only via key, and it
valid right now after modied.

Only Acuvim-DL/EL display the page.

3.6 Ethernet Network Module Settings

For Acuvim-DL and EL,under any set of system parameters mode page, press
the "H" and "P" key to enter the Network Settings page.Ethernet parameter
setting mode key operation is the same as to system parameter setting mode
key operation. Parameters have been set, simultaneously press the "P" key and
the "H" key to exit the Ethernet parameter setting mode to return to the system
parameter setting mode.

st

The 1

screen: Displays the DHCP flag settings
page. When set to 0, the static IP; set to 1, the
dynamic IP.

ALUM0366

Fig.3-73 PROFIBUS address setting

Acuvim-L

61

Acuvim-L

ALUM0367

Fig.3-74 IP address setting

ALUM0368

Fig.3-75 Subnet mask address etting

ALUM0369

Fig.3-76 Gateway address setting

The 2nd screen: Displays the IP address settings
page. IP address: 192.168.3.1

rd

The 3

screen: Displays the subnet mask address
(SUBMASK) settings page. Such as the subnet
mask address is: 255.255.255.0

th

The 4

screen: Displays the gateway address
(Gateway) settings page. Such as the gateway
address: 192.168.1.1

62

ALUM0370

Fig.3-77 Domain name server(DNS1)

ALUM0371

Fig.3-78 Domain name server(DNS2)

ALUM0372

Fig.3-79 MODBUS-TCP port setting

setting

setting

The 5th screen: Displays the IP address of the
domain name server (DNS1) settings page. Such
as server address 1:202.168.0.1

th

The 6

screen: Displays the domain name server
address (DNS2) Settings page. Such as server
address 2:202.168.0.4

th

The 7

screen: MODBUS-TCP port setting page is

displayed. Figure MODBUS-TCP address 5050.

Acuvim-L

63

Acuvim-L

ALUM0373

Fig.3-80 HTTP port setting

ALUM0374

Fig.3-81 Network module reset setting

ALUM0375

Fig.3-82 network module password

reset setting

The 8th screen: Displays the HTTP port settings
page. HTTP port address is 8080.

th

The 9

screen: Displays network module reset
settings page. Is set to 1, the reset network
module; such as 0, is not reset.

th

The 10

Screen : Displays the the network module
password reset page. Set to 1, reset network codes
12345678; set to 0 is not reset.

64

3.7 DI status Display function

Acuvim-DL and Acuvim-EL support display of 4 extend DI status. Press “H” +
“P”can enter or exit DI status display. The pages can be turned by pressing “V/A”.
From Fig. 3-83 to Fig. 3-86, it shows that all of the 4 DIs status are OFF.

st

The 1

screen: DI1 current status display. if DI1
status is turn on, the screen will display “ON”. if
DI1 status is turn o, the screen will display “OFF”.
As show in Fig.3-83, DI1 ststus is turn o.

ALUM0376

Fig.3-83 DI1 status display

nd

The 2

screen: DI2 current status display. if DI2
status is turn on, the screen will display “ON”. if
DI2 status is turn o, the screen will display “OFF”.
As show in Fig.3-84, DI2 ststus is turn o.

ALUM0377

Fig.3-84 DI2 status display

th

The 3

screen: DI3 current status display. if DI3
status is turn on, the screen will display “ON”. if
DI3 status is turn o, the screen will display “OFF”.
As show in Fig.3-85, DI3 ststus is turn o.

ALUM0378

Fig.3-85 DI3 status display

Acuvim-L

65

Acuvim-L

The 4th screen: DI4 current status display. if DI4
status is turn on, the screen will display “ON”. if DI4
status is turn off, the screen will display “OFF”. As
show in Fig.3-86, DI4 ststus is turn o.

ALUM0379

Fig.3-86 DI4 status display

3.8 TOU Energy and Maximum Demand Display

Press “V/A” and “E”simultanelously to enter the TOU Energy and maximum
demand page. Press “E” to display TOU Energy. Press “P” to display TOU Maximum
Demand. Press “H” to change the tariffs page. it could display energy under
dierent taris in Maximum Demand page. it could also display demand under
dierent taris in maximum demand page. Press “V/A” and “E” simultanelously
to exit to real-time metering mode.

On the top of the display page, "TOU" represents Time of Use related parameters;
"0" represents the total tariff; "1" indicates the represents Time of Use; "2"
indicates peak tari; "3" indicates the valley tari; "4" indicates thenormal tari.
Press E to display the energy under dierent taris, as described below.

st

The 1

screen: Total tari import energy. As shown
in Fig.3-87, Ep_Imp=1152.8kWh. Press “V/A” to turn
to the next screen.

Fig.3-87 Total tari import energy

66

Fig.3-88 Total tari export energy

Fig.3-89 Total tari import reac tive energy

Fig.3-90 Total tari export reactive energy

The 2nd screen: Total tariff export energy. As
shown in Fig.3-88, Ep_ Exp=203.8kWh. Press “V/A”
to turn to the next screen.

rd

The 3

screen: Total tari import reactive energy.
As shown in Fig.3-89, Eq_ Imp=3025.8 kvarh.Press
“V/A” to turn to the next screen.

th

The 4

screen: Total tari export reactive energy.
As shown in Fig.3-90, Eq_ Exp=7142.6 kvarh.Press
Press “V/A” to go to the next screen.

Acuvim-L

67

Acuvim-L

The 5th screen: Total tari apparent energy of TOU.
As shown in Fig.3-91, Es=1879.8 kVAh.Press “V/
A” return to 1st screen, then press “H” turn to 6th
screen.

In the same way, press “V/A” key to switch the
screen under the same taris.

Fig.3-91 Total tari apparent energy

Press “H” will switch the screen under the dierent
taris.

Press “P” would display the maximum demand under each tariff in the TOU
energy screen, The following paragraphs introduce Maximumm Demand in
details.

st

The 1

screen: Total tariff maximum power

demand. As shown in Fig.3-92, P1 = 12.68 kW, P2 =

21.32 kvar, P3 = 30.43 kVA. Press “V/A” to go to the
next screen.

Fig.3-92 Total tari maximum power

68

demand

Fig.3-93 Total tari maximum current

demand

The 2nd screen: Total tariff maximum current
demand. As shown in Fig. 3-93, I1 =10.12kA,I2 =

10.10kA, I3 = 10.09 kA, Press “V/A” to switch the
screen between maximum power demand and
maximum current demand.

Press “H” to switch the screen under the dierent

taris.

Acuvim-L

3.9 Acuvim-L Mea

Almost all the electric parameters in power systems can be measured by the
Acuvim-L series meter. The following section introduces those parameters in
more details.

Voltage (U): True RMS value of three phase voltages, three line to line voltages
is measured and displayed in the Acuvim-L series meter.

Current (I): True RMS value of three phase current, neutral current is measured
and displayed in the Acuvim-L series meter.

Power (P): Three phase power and total system power are measured and
displayed in the Acuvim-L series meter.

Reactive power (Q): Acuvim-L series meter uses the following two methods for
reactive power calculation.

1. Sinusoidal reactive power. The formula is as follows:

surement Methods and Parameter Denitions

69

Acuvim-L

2222

PSDQ −=+

22'

DQQ +=

2. Nonsinusoidal reactive power. The formula is as follows:

Where Q

D: Budeanu’s distortion power.

Q: Budeanu’s reactive power.

Apparent power (S): Three phase apparent power and total system apparent
power are measured and displayed in the Acuvim-L series meter.

Power factor (PF): Three phase power factor and total system power factor are
measured and displayed in the Acuvim-L series meter.

Frequency (F): The frequency of phase voltage input is measured as system
frequency.

Energy (kWh): Energy is time integral of power. The unit is kWh. Since power
is measured in bi-direction, positive means importing and negative means
exporting, energy is also expressed according to the power direction.

Import energy (Ep_imp): Energy imports from a source.

Export energy (Ep_exp): Energy exports to a source.

Reactive energy (kvarh): reactive energy is time integral of reactive power. The

unit is kvarh. Since reactive power is measured in bi-direction, positive means
inductive and negative means capacitive, reactive energy is also expressed
according to the load nature.

Import reactive energy (Eq_imp): inductive energy.

70

Export reactive energy (Eq_exp): capacitive energy.

%100

50

2

2

1

×















=

∑

=h

h

U

U

THD

%100

1

×=

I

I

HRI

h

h

%100

1

×=

U

U

HRU

h

h

Apparent energy: apparent energy is time integral of apparent power. The unit
is kVAh.

Harmonic parameter (not available for Acuvim-EL):

Total harmonic distortion: this factor is often used to express the power quality
of the power system. The formula is as follows:

Acuvim-L

In the formula, U

1 is Rms value of the voltage fundamental and Uh is Rms value of

the voltage harmonic with order n.

Each harmonic rate: the percentage of each harmonic is divided by the
fundamental.

Demand: real power demand, reactive power demand, total system power
demand, and three phase current demand can be measured with the Acuvim-L
series meter. The meter uses sliding window method for demand calculation.
Demand interval can be selected from 1 to 30 minutes. Demand window slides
one minute each time. For example, the demand interval is set as 3 minutes. If
the total power of the 1
is 10, the total power demand of the 3 minutes is (12+14+10)/3=12. If another
minute passed by (the 4

st

minute is 12, the 2nd minute is 14 and the 3rd minute

th

minute) and the total power for the minute is 9, the
total power demand after 4 minutes, according to the 3 minute interval, should
be (14+10+9)/3 = 11.

71

Max/Min: Acuvim-L series meter can measure the max value of real system

Acuvim-L

power, reactive power and apparent power and the max/min of the three phase
voltage and current. The data is stored in non-volatile memory and can be
accessed or cleared via meter front or communication.

Unbalance factor: Acuvim-L series meter can measure unbalance factor of three
–phase voltage and current using sequence vector method. The formula of
voltage and current unbalance factor as follows:

Voltage unbalance factor = (RMS value of V1 (V12) negative component of the
fundemental wave / RMS value of V1 (V12) positive component of fundemenal
wave) x 100 %

Current unbalance factor = (RMS value of I1 negative component of the
fundemental wave / RMS value of I1 positive component of fundemenal wave) x
100 %

Energy measurement: The energy measurement type include real time energy
measurement and time of use (Acuvim-EL only) energy measurement. The
function is described as follows:

Real time energy: the accumulation of energy for the kWh, kvarh and kVAh since
cleared last time. The real time energy includes each single-phase energy, which
could be useful for observing the increment of single-phase energy.

Time of use (TOU): User can assign up to 4 dierent taris (sharp, peak, valley
and normal) to different time period within a day according to the billing
requirements. The meter will calculate and accumulate energy to dierent taris
according to the meter’s internal clock timing and TOU settings.

TOU setting: User can set a maximum of 12 TOU seasons, each season can be

assigned to a TOU schedule (a maximum of 14 TOU schedules are available). Each

72

schedule can be divided up into 14 segments (in which each segment can have
its own tari).

User can customize the TOU calendar (including its tariffs, seasons, schedules
and segments) according to dierent applications. To make sure that the TOU
calendar is setup correctly, the meter will check the TOU settings according to
the predened rules (see below for “TOU setting format requirement” for details).
TOU function will be disabled if the TOU calendar is set up incorrectly. If no
errors are found in the calendar and the TOU function is enabled, TOU energy
accumulation will begin.

TOU setting format requirement:

1. Season setting parameter: The calendar year will be divided up into dierent
seasons depending on the season setting parameter. The parameter can be
selected from any integer between 1 to 12. User must enter the correct value
for the season setting parameter in accordance to the TOU season table. If the
season setting parameter is set as 2, the rst 2 slots of the TOU season table must
be set, otherwise it will be considered as an invalid input (TOU function will be
disabled).

2. TOU season format: Enter the start date into the TOU season table slot
following this format “MM-DD ID” - MM stands for the month, DD stands for the
day and ID stands for the TOU schedule ID (available from 01 to 14). The dates
should be organized so that they are in sequence according to the calendar
year (the earlier date comes rst and the later date comes last). For example, if 3
seasons are selected, the date parameters are January 1, June 6 and September 7,
and TOU schedule 02, 01, 03 will be used respectively, the rst TOU season table
slot shall enter 01-01 02, the second slot shall enter 06-06 01, and the third slot
shall enter 09-07 03. Entering 01-01 02 for the rst slot, 09-07 03 for the second
slot and 06-06 01 for the third slot is considered invalid.

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73

3. Schedule setting parameter: The number of available TOU schedules

Acuvim-L

depends on the schedule setting parameter. The parameter can be selected
from any integer between 1 to 14. This parameter determines the number of
TOU schedules available for the TOU calendar setting. A maximum of 14 TOU
schedules (from TOU Schedule #1 to TOU Schedule #14) can be used.

4. Segment setting parameter: Each TOU schedule consists of various timing
segments. The number of segments depends on the segment setting parameter
setup. The parameter can be selected from any integer between 1 to 14
(inclusively). User must enter the correct value for the segment setting parameter
in accordance to the TOU schedule table. If the segment setting parameter is set

as 3, the rst 3 slots of the TOU schedule table must be set, otherwise, it will be
considered as an invalid input (TOU function will be disabled).

5. TOU schedule format: Each TOU schedule represents a 24 hour cycle. Similar
to TOU season format, enter the start time into the TOU schedule table slot
following this format “HH:MM ID” - HH stands for hour (in 24 hr format), MM
stands for minutes and ID stands for taris (available from 00 to 03). The time
should be organized according to the hour sequence. For example, if 3 segments
are selected, timing parameters are 01:00, 15:30, 22:45, the order of the 3
segments should be one of the following: 01:00, 15:30, 22:45 or 15:30, 22:45,
01:00 or 22:45, 01:00, 15:30 Entering time information in a wrong sequence (for
example, entering 15:30, 01:00, 22:45) is considered as an invalid operation, TOU
function will be disabled.

6. Tari setting parameter: This parameter corresponds to the number of taris
available for the TOU calendar and can be selected from any integer from 0 to 3.
The four taris: sharp, peak, valley and normal are represented by 4 integers: 0,
1, 2 and 3 respectively. If the tari setting parameter is set to 3, all of the 4 taris
will be available for the TOU calendar; if the parameter is set to 1, only the rst 2

74

taris (sharp and peak) will be available.

7. Holiday setting parameter: This parameter can be set from any integer
between 1 and 30, meaning a maximum of 30 holidays can be programmed to
the TOU calendar. If the holiday setting parameter is set as 3, the rst 3 slots of
the holiday schedule must be set, otherwise it will be considered as an invalid
input (TOU function will be disabled).

Note: User can either customize the TOU calendar factory settings or use the
default factory settings. User can reset the TOU calendar to its default value
either via communication.

8. Holiday schedule: The holiday schedule uses the same format as the TOU
seasons “MM-DD ID”. User can select which TOU schedule to be used for the
holiday. The dates of the holiday schedule do not need to be organized in
a sequential order (i.e. the first slot can be January 1, the second slot can be
December 26 and the third slot can be December 25).

9. Daylight saving time(DST): under the circumstance that DST is enabled, if you
choose the xed date option, you set a xed date for DST, the format is month
/ day / hour / minute / adjust the time (in minute ). If you choose the non-xed
data option, you set a day in a week for DST, the format is month / which week/
day / hour /minute / adjust time (in minute). Once DST is enabled, DST will be
automatically implemented by the chosen option.

When the clock startes to run DST, the meter will automatically adjust the clock
for a settable time period in advance. When the clock runs to the end of DST, the
meter will automatically adjust the clock back for a settable time period.

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75

Acuvim-L

Fig.3-94 DST setting interface

76

10.Holidays preset function: Ten years holiday setting

In this setting, users can program holidays in the future decade. The format is
month / day , holiday code.

When “Enable Holiday Years Settings” is checked, users can click “Make Holiday
Settings (10 Year)” to enter the holiday table setup page. Once the setup is done,
users can click “Generate”, by which a holiday table for the next decade can be
generated. Figure 3-94 depicts a ten year holiday table.

Fig.3-95 ten years holiday table

Acuvim-L

77

11. Weekend Schedule: Weekend Setting (bit0 : Sunday; bit1 ~ bit6: Monday to

Acuvim-L

Saturday; bit 0 means not effective, bit 1 means effective). For example, when
the Weekend Setting bit0 is 1, it means Sunday is eective. When the Weekend
Setting bit1 is 1, it means Monday is eective. For example, if a user wants to set
Saturday and Sunday effective, he should put 65 (1000001) into the Weekend
Setting eld. When the meter clock is within the preset Weekend Schedule, the
energy will accumulate under the tari that corresponds to the Schedule.

Note: Holiday schedule has the highest priority among all the schedules followed

by the Weekend Schedule. That is, when set appropriately, holiday and weekend
schedules override normal (weekday) TOU settings. When a holday falls in a
weekend, the holiday schedule overrides the Weekend Schedule.

Record and Clear of Maximum Demand

Acuvim-EL could record the maximum power and current demand under
dierent taris, when the TOU Function is enabled and the setting of time table is
correct. It also can clear the value under dierent taris.

There are two ways of resetting Current Month TOU:

1. End of Month: This is the default method. All values from Current Month TOU
will be copied over to Prior Month TOU at the very beginning of each month (the
rst day of each month at time 00:00:00).

2. Assign: User can select when should the values from Current Month TOU be
copied over to Prior Month TOU. User can set the time in the following format
“DD HH:MM:SS” - DD stands for day, HH stands for hour, MM stands for minute, SS
stands for second. Similar to the previous method, once Current Month TOU is
transferred to Prior Month TOU.

Over/Under limit alarming: Acuvim-BL, DL, EL has over/under limit alarming
capability.if you want to learn more please read the introduction of extend IO

78

function chapter.

Energy Pulse Output: The two digital outputs (DOs) from the Acuvim-BL, DL, EL
can be used as energy pulse output.

Introduction of extend IO function: As shown in Fig.3-95 extended IO
parameter setting, it includes DO type, DI type and Communication settings.

Acuvim-L

Fig.3-96 Extend IO parameter setting

79

Extension IO communication:

Acuvim-L

Acuvim-EL and Acuvim-DL extended IO module supports RS485 communications
with Modbus-RTU protocol, the extended module share the same device address
and it supports six baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600 as
well as dierent parity selections. The setting of baud rate and parity check can
implement by software and meter display screen. It can be be implemented
by software or from the meter front. The instrument can be connected with the
PROFIBUS communication module at the same time. For detailed content, please
refer to Acuvim-L Profibus Modules User’s Manual. In addition, the meter can
be connected to the Ethernet network communication module. Modbus-TCP/IP
protocol communication, web access, timing mail send and other functions can
be realized. For details, please refer Ethernet Module User’s Manual

Digital output (DO)

As shown in Fig.3-95, the DO type includes alarm output and energy pulse
output. DO type can be set via software as well.

Over/Under limit alarming:

Acuvim-BL, Acuvim-DL and Acuvim-EL has over/under limit alarming capability.
When the monitored parameter goes beyond/below the preset limit and stays
at the level over the preset amount of time delay, the over/under limit alarm will
be triggered. The meter LCD screen backlight will ash and the corresponding
digital output (DO) will be activated until the parameter condition returns to
normal. Upon alarming, DO can be used to activate devices such as safety beacon
light and buzzer. Each DO supports 1 alarming parameter. An over/under limit
alarming example is shown below.

For example:

Alarming Condition: when Phase B current goes above 180A (CT ratio is set as

80

200:5) for over 15 seconds, over limit alarm will be triggered, alarm signal will be
set out via DO1. Setting procedures should be as follows: Enter DO parameter
setting mode by pressing “P” and “E” simutaneously under system parameter
setting mode.

1) Set DO1 mode to 1 (alarm output)

2) Set delay time to 50 (the base unit of delay time is 300ms, the setting value

should be 15/0.3=50)

3) Set alarming parameter to 8 (tracking object for parameter 8 isPhase B
current))

4) Set inequality sign to 1 (greater than)

5) Set alarm value to 4500 (according to Table 4-9. Conversion relationship of

basic measurements from Chapter 4.4 <<Data address table of Acuvim-L>>,
the setting relationship is I=Rx*(CT1/CT2)/1000, Rx=4500) Press “V/A” to accept
change then press “P” and “E” simutaneously to exit DO parameter setting mode.

Energy Pulse Output:

Acuvim-BL, Acuvim-DL and Acuvim-EL has Energy pulse output function. Each
energy pulse output channel can be set to monitor one of the four energy
parameters (Ep_imp, Ep_exp, Eq_imp or Eq_exp). Pulse constant and pulse
with can also be set according to user’s requirement. Pulse constant stands
for amount of energy (kWh or kvarh) per pulse; pulse width stands for the time
duration for each pulse. DO will send out a pulse signal when the accumulated
energy reaches the pulse constant value. Related parameters: pulse energy
output ranges from 0 to 4 corresponding to none, Ep_imp, Ep_exp, Eq_imp, Eq_
exp. Pulse constant ranges from 800 to 60000; Pulse width ranges from 1 to 50
(word) with a unit of 20ms. The shortest interval between two pulses is 20ms.

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81

In practice the pulse width and the pulse ratio are selected according to system

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power. The relation of the two parameters should satised following expression:
((1000*3600s)/P*Pulse_Const)>pulse width. In the expression, the unit of the
power or reactive power is w or var.

Digital Input (DI)(DL, EL)

Fig.3-97 SOE record display

82

Fig.3-98 DI counter and status display

(1) DI function introduction:

The DI type can be set as shown in Fig.3-95 Extend IO parameter setting.

If SOE record function is selected, the DI will work as SOE state mode as shown
Fig. 3-96 SOE record display; if the counter is selected, the DI will work as input
pulse accumulation mode as shown in Fig.3-87 DI count and status display.

(2) SOE (Sequence of Event) function:

1) At present, the event allows the cycle of 20 SOE recording. When DI is in SOE
state mode, once the DI input level changes occur, an SOE event will be recorded.
In this way, it will achieve 20 SOE event loop recording. The event format: Year,
Month, Day, Minute, Seconds, Millisecond, DI status.

2) SOE function judges the single read event value. When a single event is
read, if the value is not the latest event in the log, it reads this single event and
the record number will be increased. If a record is the latest event, the incident
remains unchanged. The previous events can be read by the record numbers.

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83

event be read, if the value is not currently reading the latest value of the event

Acuvim-L

log, it reads the current single event and the record number will be incremental,
if current reading record number is the latest event record number, a single
incident remain unchanged. by re-written a single event number, the user can
implement the previous event re-read.

(3) Pulse Counter function:

When the DI type is set to Pulse Counter, corresponding to the accumulated
pulse constant value, it achieves the cumulative function of DI input pulses. If
pulse constant is 1, DI input receives 1 input signal then cumulative pulse amount
adds 1. If pulse constant is 10, DI input receives 10 pulses then cumulative pulse
amount adds 1.

84

Chapter 4 Communication

4.1 Modbus Protocol Introduction

4.2 Modbus Protocol

4.3 Communication Format

4.4 Ethernet Module (AXM-NET)

4.5 Data Address Table

This chapter will mainly discuss how to operate the meter via communication

Acuvim-L

port using software. To master this chapter, you should be familiar with Modbus
and read other chapters of this manual to make sure that you have a good
understanding of the functions and applications of this product.

This chapter includes: Modbus protocol, format of communication and data
address table and Acuvim-L application details.

4.1 Modbus Protocol Introduction

ModbusTM RTU protocol is used for communication in Acuvim-L series meter.
Data format and error check methods are defined in Modbus protocol. The
half duplex query and respond mode is adopted in Modbus protocol. There is
only one master device in the communication net. The others are slave devices,
waiting for the query of the master.

Transmission mode

The mode of transmission denes the data structure within a frame and the rules
used to transmit data. The mode is dened in the following which is compatible
with Modbus RTU Mode*.
* Modbus is trademark of Modicon, Inc.

Coding system 8-bit binary
Start bit 1
Data bits 8
Parity NO parity; Odd parity; EVEN parity
Stop bit 1 or 2
Error checking CRC check

86

4.2 Modbus Protocol

Framing

Table 4-1 data frame format

Address Function Data Check

8-bit 8-bit N×8-bit 16-bit

Address eld

The address field of a message frame contains eight bits. Valid slave device
addresses are in the range of 0~247 decimal. A master addresses a slave by
placing the slave address in the address eld of the message. When the slave
sends its response, it places its own address in this address eld of the response
to let the master know which slave is responding.

Function eld

The function code eld of a message frame contains eight bits. Valid codes are
in the range of 1~255 decimal. When a message is sent from a master to a slave
device the function code eld tells the slave what kind of action to perform.

Table 4-2 Function code

Code Meaning Action

01 Read Relay Output Status Obtain current status of Relay Output
02 Read Digital Input(DI) Status Obtain current status of Digital Input

03 Read data

16 Preset multiple-registers

Obtain current binary value from one
or more registers

Place specic value into a series of
consecutive multiple-registers

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87

Data eld

The data eld is constructed using sets of two hexadecimal digits, in the range

Acuvim-L

of 00 to FF hexadecimal. The data eld of messages sent from a master to slave
devices contains additional information which the slave must use to take the
action defined by the function code. This can include items like discrete and
register addresses, the quantity of items to be handled, and the count of actual
data bytes in the field. For example, if the master requests a slave to read a
group of holding registers (function code 03), the data eld species the starting
register and how many registers are to be read. If the master writes to a group of
registers in the slave (function code 10 hexadecimal), the data eld species the
starting register, how many registers to write, the count of data bytes to follow in
the data eld, and the data to be written into the registers.

If no error occurs, the data eld of a response from a slave to a master contains
the data requested. If an error occurs, the eld contains an exception code that
the master application can use to determine the next action to be taken. The
data eld can be nonexistent (of zero length) in certain kinds of messages.

Error Check Field

Every message includes an error checking field which is based on the Cyclical
Redundancy Check (CRC) method. The CRC field checks the contents of the
entire message. It is applied regardless of any parity check method used for the
individual characters of the message. The CRC eld is two bytes long, containing
a 16-bit binary value. The CRC value is calculated by the transmitting device, and
is appended to the message.

The receiving device recalculates the CRC value during reception of the message,
and compares the calculated value to the actual value it received in the CRC
eld. An error will be reported if the two values are not equal. CRC calculation is
rst started by preloading the whole 16-bit register to 1’s. The process begins by

88

applying successive 8-bit bytes of the message to the current contents of the
register. Only the eight bits of data in each character are used for generating the
CRC. Start and stop bits, and the parity bit, do not apply to the CRC.

When generating the CRC, each 8-bit character is exclusive ORed with the
register contents. The result is shifted towards the least signicant bit (LSB), with
a zero lled into the most signicant bit (MSB) position. The LSB is extracted and
examined, if the LSB equals to 1, the register is exclusive ORed with a preset, xed
value; if the LSB equals to 0, no action will be taken. This process is repeated
until eight shifts have been performed. After the last (eighth) shift, the next 8-bit
byte is exclusive ORed with the register’s current value, and the process repeats
for eight more shifts as described above. After all the bytes of the message
have been applied,the nal contents of the register, which should exchange the
high-byte and the low-byte, is the CRC value. When the CRC is appended to the
message, the low-order byte is appended rst, followed by the high-order byte.

4.3 Communication Format

Explanation of frame

Table 4-3 Explanation of a frame

Addr Fun Data start

reg HI

06H 03H 00H 00H 00H 21H 84H 65H

As shown in table 4-3 the meaning of each abbreviated word is:
Addr: Address of slave device

Data start

reg LO

Data #of

regs HI

Data #of

regs LO

CRC16HICRC16

LO

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89

Fun: Function code

Acuvim-L

Data start reg HI: Start register address high byte
Data start reg LO: Start register address low byte
Data #of reg HI: Number of register high byte
Data #of reg LO: Number of register low byte
CRC16 HI: CRC high byte
CRC16 LO: CRC low byte

Chapter4 Communication

1. Read Status of Relay (Function Code 01)

This function code is used to read status in Acuvim-EL.1=On, 0=O;

There are 2 Relays in Acuvim-DL/EL. The Address of each Relay is Relay1=0000H
and Relay2=0001H.

The following query is to read Relay Status of Acuvim-EL Number 17.

Query

Table 4-4 Read the status of Relay1 and Relay2 Query Message

Addr Fun

11H 01H 00H 00H 00H 02H BFH 5BH

Relay

start reg

Relay

start reg

hi

Relay # of

lo

reg hi

Relay # of

reg lo

CRC16

Hi

Response

The Acuvim-DL/EL response includes the Acuvim-DL/EL address, function code,
quantity of data byte, the data, and error checking. An example response to read
the status of Relay1 and Relay2 is shown as Table4-5 The status of Relay1 and
Relay2 are responding to the last 2 bits of the data.

90

CRC16

Lo

Relay1:bit0 Relay2:bit1

Table 4-5 Relay status Response

Addr Fun Byte count Data CRC16 Hi CRC16 Lo
11H 01H 01H 02H BFH 5BH

The content of the data is:

7 6 5 4 3 2 1 0

0 0 0 0 0 0 1 0

MSB LSB

(Relay 1 = OFF , Relay 2=ON)

2. Read the status of DI(Function 02)

Function Code 02

1=On 0=O

DI1’s address is 0x0000, DI2’s address is 0x0001, and so on.

The following query is to read the Status of 4 DIs of Acuvim-DL/EL with the

address of 17.

Query

Table 4-6 Read 4 DIs Query Message

Acuvim-L

Addr Fun

11H 02H 00H 00H 00H 04H 7BH 59H

DI start
addr hi

DI start
addr lo

DI num hiDI num loCRC16

Hi

CRC16

Lo

91

Response:

Acuvim-L

The Acuvim-DL/EL response includes the Acuvim-DL/EL address, function code,
quantity of data characters, the data characters, and error checking. An example
response to read the status of 4 DIs are shown as Table 4-7 The status of 4 DIs are
responding to the last 4 bits of the data.

DI1: bit0; DI2: bit1; DI3: bit2; DI4: bit3.

Table 4-7 Read Status of DI

Addr Fun Byte count Data CRC16 Hi CRC16 Lo
11H 01H 01H 03H E5H 49H

0 0 0 0 DI4 DI3 DI2 DI1

0 0 0 0 0 0 1 1

MSB LSB

3. Read Data (Function Code 03)

Query

This function allows the master to obtain the measurement results from the
Acuvim-L series meter. Table 4-8 is an example to read the 3 measured data (F, V1
and V2) from slave device number 17, the data address of F is 0130H, V1 is 0131H
and V2 is 0132H.

92

Table 4-8 Read F, V1 and V2 Query Message

Acuvim-L

Addr Fun

11H 03H 01H 30H 00H 03H 06H A8H

Data start

addr HI

Data start

Addr LO

Data #of

Regs HIi

Data #of

Regs LO

CRC16

Hi

CRC16

Lo

Response

The Acuvim-L series meter response includes the address code, function code,
quantity of data byte, data, and error checking. An example response to read F,
V1 and V2 (F=1388H (50.00Hz), V1=03E7H (99.9V), V2=03E9H (100.1V) is shown
as Table 4-9.

Table 4-9 Read F, V1 and V2 Message of response

Byte

Addr Fun

11H 03H 06H 13H 88H 03H E7H 03H E9H 7FH 04H

Data1HIData1

count

Data 2HIData2LOData3HIData3LOCRC16HICRC16

LO

LO

4. Preset / Reset Multi-Register (Function Code 16)

Query

Function 16 allows the user to modify the contents of a multi-register. Any
register that exists within the Acuvim-L series meter can have its contents
changed by this message. The example below is a request to an Acuvim-L series
meter with the address of 17 to Preset Ep_imp = (17807783.3KWH), while its HEX
value is 0A9D4089H. Ep_imp data address is 0156H and 0157H.

93

Acuvim-L

Addr Fun

11H 10H 01H 56H 00H 02H 04H

Value HI Value LO Value HI Value lO CRC HI CRC LO

Data start reg HIData start reg LOData #of reg HIData #of reg

0AH 9DH 40H 89H 4DH B9H

Table 4-10 Preset KWH Query Message

LO

Response

The normal response to a preset multi-register request includes the Acuvim-L

series meter address, function code, data start register, the number of registers,

and error checking.

Table 4-11 Preset KWH Query Message

Byte Count

Addr Fun

11H 10H 01H 0CH 00H 02H A2H B4H

Data start

reg HI

Data start

reg LO

Data #of

reg HI

Data #of

reg LO

CRC16HICRC16

4.4 Ethernet Module (AXM-NET)

4.4.1 Introduction to Ethernet

Ethernet was originally developed by Xerox and then developed further by
Xerox, DEC, and Intel. Ethernet uses a Carrier Sense Multiple Access with Collision
Detection (CSMA/CD) protocol, and provides transmission speeds up to 10 Mbps.

Now Ethernet stands for LAN with CSMA/CD protocol.

Ethernet is the most current communication standard in LAN. This standard denes

94

LO

the used type of cable and the method of Signal processing in LAN.

22mm

4.4.2 Function Description of Ethernet module

Please read appendix of technical data and specifications of Ethernet module
before using.

* The Ethernet module supports Modbus-TCP protocol. It is used as a server,
the default value of the protocol port is 502, and the user dened range of the
protocol port is 2000~5999. The device address is the same as the meter.

* The Ethernet module supports SMTP protocol. It has an email function and
supports “Send mail for timing” mode and “Send mail for event” mode.

* The Ethernet module supports HTTP protocol. It is used as an HTTP server, the
default value of the protocol port is 80, and the scope of the protocol port is
6000~9999.

* The Ethernet module supports SNMP protocol. It is used as a SNMP agent,
providing management to MIB library, so you can get data from the meter.

* The Ethernet module supports SNTP protocol. It can get update time to
Coordinated Universal Time (UTC).

4.4.3 Appearance and Dimensions

Acuvim-L

(Side View)

95