Njoy DDSU666 User manual

DDSU666
User manual
SIAMETER1P666CU01H
Before using this product, carefully read all product documentaon and retain it for future reference.
322.10.23.0

2
Thank you for purchasing our products!
Please read this manual before using the product.
NOTE!
If any of the above package content is missing or is damaged please contact the
shop where you have bought the product from.
nJoy inverters models that are compable with this product:
A Smart Meter is a bidireconal device that records the load curve and controls
the various energy ows, giving highly accurate measurements and rapid
communicaon through the chosen communicaon network.
Ascet Series Hybrid inverter
Monophase
Astris Series Grid-ed inverter
Monophase
5k/6K
2K/3K/4K/5K/6K/ 7K/8K/10K

3
Brief Introduction1
1.1. Main applicaon & applicable range
Type DDSU666 single phase electronic energy meter (din-rail) (hereinaer
referred to as the “instrument”) is designed based on power monitoring and
energy metering demands for electric power system, communicaon industry,
construcon industry, etc. as a new generaon of intelligent instrument
combining measurement and communicaon funcon, mainly applied into the
measurement and display for the electric parameters in the electric circuit
including voltage, current, power, frequency, power factor, acve energy,
etc. The network can be realized through RS485 communicaon interface
and external device. Adopng the standard DIN35mm din rail mounng
and modular design, it is characterized with small volume, easy installaon
and easy networking, widely applied into the internal energy monitoring and
assessment for industrial and mining enterprises, hotels, schools, large public
buildings.
1.2. Product Features
1) Metering the posive and negave acve power.
2) Adopng wide LCD, it has clear vision.
3) RS485 communicaon funcon with communicaon protocol complied
with Modbus-RTU.
4) Adopng DIN35mm standard din rail mounng, structural modular design,
it is characterized with small volume, easy installaon and easy networking.
1.3 Model composion and meanings
Figure 1 Model No. & meanings

4
1.4 Applicable environmental condion.
Regulated working temperature range: -25°~C+60°C
Limited working temperature range: -35°C~+70°C
Relave humidity(Annually average):75%
Atmospheric pressure:86kPa~106kPa
The working principle block diagram of the instrument is shown in gure 2:
3.1 Model specicaon
Working Principle
Main Technical Performance & Parameters
2
3
NOTE!
Please take the physical sign as standard.
Figure 2 Work principle block diagram
Table 1 Model specicaon
Model Accuracy
class Frequency Reference voltage
Current
specicaon
Instrument
constant Type
DDSU666.004.0004 Acve
Class 1 60Hz 230 V 5(80)A 800imp/ kWh
Direct
connecon
DDSU666.004.0004 Acve
Class1 60Hz 230 V 1.5(6)A 6400imp/ kWh
Via
transformer

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3.2Percentage error
3.3 Start
3.4 Deucon
Type Current range Power factor
Percentage error limit of
each class
instrument (%)
Class 1
Via CT
0.01In≤I<0.05In 1±1.5
0.05In≤I≤Imax 1±1.0
0.02In≤I<0.1In 0.5L, 0.8C ±1.5
0.1In≤I≤Imax 0.5L, 0.8C ±1.0
Direct connecon
0.05Ib≤I<0.1Ib 1±1.5
0.1Ib≤I≤Imax 1±1.0
0.01Ib≤I<0.2Ib 0.5L, 0.8C ±1.5
0.2Ib≤I≤Imax 0.5L, 0.8C ±1.0
Instrument
Accuracy class of the energy meter
Power factor
Class 1
Direct connecon 0.004Ib
1
Via transformer 0.002In
NOTE!
In: secondary rated current of the current transformer; Ib: calibrated current
of the meter;
L:inducve; C: capacive;
The electric energy meter should have good an-deucon logic. When the
voltage loop with 1.15 mes of referenced voltage and the current loop is
disconnected, the energy will not produce more than one pulse.
Table 3 Under the referenced voltage and table 4, the energy meter can be started and
connuously measure the energy
Table 2 Percentage error of single phase energy meter not exceeding the below corresponding
limited value

6
3.5 Deucon
3.6 Other technical parameters
3.7 Adopon for key components
Specied operang voltage range 0.9Un~1.1Un
Extended operang voltage range 0.8Un~1.15Un
Ulmate operang voltage range 0 Un~1.15Un
Power consumpon of the voltage circuit ≤1W/8VA
Power consumpon of the current circuit ≤2.5VA
Measuring range 0~999999.99 kWh (only display 6 bit, automac shi
of decimal point)
Display mode LCD display
Communicaon
protocol Modbus-RTU protocol
Metering chip SH79F7019
Crystal 32.768kHz
Power transformer ZTY6.170.234
Printed wiring board
1.5 (6) A:ZTY8.067.2729V2, ZTY8.067.2731V2,
ZTY8.067.2732V2
5 (80) A : ZTY8.067.2729V2, ZTY8.067.2730V2
Current transformer ZTY6.176.301
Table 4 Electrical parameters
Table 5 Other technical parameters
Table 6 Adopon for key components
NOTE!
The actual plate number is determined according to the actual sample table.
Main functions4
4.1 Metering funcon
4.2 Displayed funcons
1) Accurately metering the posive and negave acve power;
2) The storage data of the electric energy meter will not lost aer powering
o.
When the energy meter is in normal working condion (on load state), the
posive pulse indicator should be ashed. If long me for no ashing or light
for the indicator, please check whether the wiring mode of the energy meter
is right or not.

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Symbol Meaning
VThe unit of the voltage, the display data of indicang LCD is voltage
AThe unit of the current, the display data of indicang LCD is current
WThe unit of the acve power, the display data of indicang LCD is acve power
var The unit of the reacve power, the display data of indicang LCD is reacve
power
Hz The unit of the frequency, the display data of indicang LCD is frequency
kWh The unit of the acve energy, the display data of indicang LCD is acve energy
Table 7 LCD logo meanings
The display me of the measurement data is ve seconds and informaon
sample for every page of the measured informaon of measurement data (if
not consistent with the instrument panel, please take the object as standard.)
Light me of the background: 1 min.

Display
interface Instrucon

Means the current display voltage is U, the unit is “V”,
the le picture is U=220.0V

Means the current display current is I, the unit is “A”,
the le picture is I=5.000A.

Means the current display is the acve power P, the
unit is “kW”, the le picture is P=1.100kW.

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
Means the current display is the power factor Ft, the
le picture is Ft=1.000.

Means the current display is frequency F, the le
picture is F=50.00Hz.

Means the current posive acve energy EImp, the
unit is “kWh”, the le picture is EImp=1.20kWh.

Means the current negave acve energy EExp, the
unit is “kWh”, the le picture is EExp=1.00kWh.

Means the current combinaon acve energy total
ComEp, the unit is “kWh”, the le picture is ComE-
p=2.20kWh.

Means the current communicaon protocol is Modbus.

Represents 8 data bits, no eect bit and one stop bit of
the current communicaon protocol.

Means the current communicaon address is 11.

Means the current communicaon baud rate is 9600.

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4.3 Communicaon funcon
Figure 3 Long press buon
Keyboard operaon: Aer pressing the buon for a long me, the display
interface enters the switching interface of seng 645 protocol and Modbus
protocol. Shortly press can switch the protocol, not the address page (only
the ModBus protocol can be switched to the address page), the address of
ModBus can be set by the buon, the buon can set the address range 1-99
The instrument adopts RS485 communicaon mode with baud rate to be
set as 1200, 2400bps, 4800bps and 9600bps.For a same communicaon
circuit, it can at most be connected with thirty-two instruments at the same
me, with each instrument to be set as their communicaon address. For the
communicaon connecon, it should use shielded twisted pair with copper
mesh with wire diameter not below 0.5mm2 . On wiring arrangement, the
communicaon line shall be away from strong cable or other strong electric
eld with the maximum transmission distance to be 1200m. For the typical
networking connecon mode, please see the below gure, users can select
other suitable connecon mode based on detailed condions.

10
Figure 4 Schemac diagram of communicaon connecon
When the instrument is set to be ModBus-RTU transmission mode,
ModBus-RTU communicaon protocol adopts host-slave response in one
communicaon line. Firstly, the host computer’s signal will seek for a terminal
device (slave) with only one address, then the terminal device will produce
response signal and transmit to the host computer in opposite direcon, that is,
half duplex working mode. This protocal only allows communicaon between
the host (PC, PLC, etc.) and the terminal device, rather than data exchanges
between the independent terminal devices. Thus, each terminal device will not
occupy the communicaon circuits in their inializaon, and only be limited to
response the query signal to the host computer. The instrument can provide
ModBus-RTU communicaon protocol (see appendix A), for the parameter
informaon to be read or modied by the communicaon, please see the
below table.
Parameter
address
Parameter
code
Instrucon of the
parameters
Type of data Length of data
Word
Read&write
aributes
0000H UCode Programming
password codE
16-bit with
symbols 1R/W
0001H REV. Reserved, actual
read is the
version number
16-bit with
symbols 1 R
0002H ClrE Electric energy
zero clearing
CLr.E(1:zero
clearing)
16-bit with
symbols 1R/W
0003H RESERVED RESERVED 16-bit with
symbols 1
0004H RESERVED RESERVED 16-bit with
symbols 1
0005H ChangePro-
tocol
Protocol chang-
ing-over
16-bit with
symbols 1R/W

11
0006H Addr Communication
address Addr
16-bit with
symbols 1R/W
0007H Urat RESERVED 16-bit with
symbols 1
0008H Irat RESERVED 16-bit with
symbols 1
0009H RESERVED RESERVED 16-bit with
symbols 1
000AH RESERVED RESERVED 16-bit with
symbols 1
000BH RESERVED RESERVED 16-bit with
symbols 1
000CH BAud Communication
baud rate
bAud
16-bit with
symbols 1 R/W
000DH RESERVED RESERVED 16-bit with
symbols 1
000EH RESERVED RESERVED 16-bit with
symbols 1
000FH RESERVED RESERVED 16-bit with 1
0010H RESERVED RESERVED 16-bit with 1
2000H U Voltage single precision
oang decimal 2 R
2002H I Current single precision
oang decimal 2 R
2004H PConjuncon acve
power, the unit is
KW
single precision
oang decimal 2 R
2006H Q Conjuncon
reacve power,
the unit is Kvar
single precision
oang decimal 2 R
2008H RESERVED RESERVED single precision
oang decimal 2 R
200AH RESERVED Conjuncoon
power factor
single precision
oang decimal 2 R
200CH RESERVED RESERVED single precision
oang decimal 2 R
200EH Freq Frequency single precision
oang decimal 2 R
2010H RESERVED RESERVED single precision
oang decimal 2 R
Electrical data of the secondary side
4000H Ep Acve in electric-
ity
single precision
oang decimal 2 R

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Figure 5 Conguraon
Installation & Operation Instruction5
5.1 Inspecon
1) Before installaon, rstly check whether the model No. and specicaon
of the product on the package is the same as the object. If not, please contact
the supplier.
2) Check whether the product shell in the carton is damaged, if is, please
contact the supplier.
5.2 Installaon
Directly clip the instrument on the rail and install it on the distribuon box.
1)When installing, rstly clip one terminal of the slot and then clip to the rail
with power.
2)When disassembling, press the movable card with a screwdriver and take
out the instrument.
ChangeProtocol such as protocol switching, data for 2 for Modbus RTU
protocol -, data to 1 for DL/T 645-2007;
The CLr. E power reset write 1 removal of total power; BAud rate: 1:2400bps;
2:4800bps; 3:9600bps;
Outline dimension: 36mm×98mm×65mm
Din rail mounng dimension: 35mm, with conguraon to be shown as
gure 4
4.4 Outline &Mounng Dimension

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Figure 6 Direct connecon
Figure 7 Via transformer
6
5.3 Wiring mode
6.3.1 Instrucon of wiring terminal
Before powering, you must check whether the wiring mode of the instrument
is correct, and the wiring diagram is shown as below:

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Fault
phenomenon
Analysis of
causes Troubleshoong Remark
Display fault
The wiring may
not connected
according to
the wiring
diagram of the
meter
Check if the actual connecon is
the same as the requirement of
the wiring diagram. Pay special
aenon to “N” posion of the
voltage, the high&low end of the
current and terminal labeling are
dierent from actual number.
While checking the
connecon, be sure
the meter is in the
state of disconnecon,
guarantee the safety of
human life.
Communicaon
fault
The communi-
caon seng
informaon of
the meter may
be incorrect
Check if the communicaon
seng informaon such as
comunicaon address, baud rate,
vericaon mode is the same as
the PC sengs.
Diagnosis, analysis and elimination of common faults
Transportation & Storage
6
7
If the above method cannot eliminate the fault, please contact with the aer-
sale service of digital meter from Zhejiang CHINT Instrument Co., Ltd.
The package of the instrument shall adopt materials complied with
environmental protecon, under package condion, the instrument and
accessories shall be stored in the dry and venlated places, to avoid humidity
and corrosive gas erosion, with the limited environmental temperature for
storage to be -40°C!+70°C and relave humidity not exceeding 75%. The
package of the instrument shall comply with the provisions of GB/T 13384-
2008 of General specicaons for packings of mechanical and electrical
products with the environmental temperature requirement and transportaon
for the normal storage complied with the provisions of GB/T 25480-2010
of Basic environmental condions and tesng methods for instruments
transportaon and storage
Complete set of package for single product, including:
1) One set of instrument
2) One operaon manual
3) One bag of desiccant
4) Cercate

15
Start Address code Funcon
code Data eld CRC check code End
More than
3.5-character
dead me 1 character 1 character n characters 2 characters
More than
3.5-character
dead me
Maintenance & Service8
Appendix A: MODBUS-RTU Communicaon Protocol
A.1 Communicaon format
Informaon transmission adopts asynchronous mode, taking byte as the unit.
The communicaon date transmied between the host and slave computer
is the format of 10-digit characters, including one start bit(0), 8 data bits
without check bit, two stop bits(1)(other format can be customized). Format
of informaon frame:
A.2 Communicaon informaon transming procedure
When communicaon command is transmied from the host computer to
the slave computer, the slave computer which matches the address code sent
by the host computer receives the communicaon command. If CRC checks
without any fault, then the corresponding operaon will be carried out, aer
that the implement result (date) is returned to the host computer. The returned
informaon contains address code, funcon code, implement date and CRC
check code.
A.2.1 Address code
Address code is the rst byte of each communicaon frame, with the range
from 1 to 247. Each slave must have an exclusive address code in the bus,
only the slave computer which matches the address code sent by the host
computer can respond returned informaon. When the slave computer
returns the informaon, the returned data will begin with their respecve
address codes. The address code sent from the host computer indicates the
slave address, the returned address code from the slave computer indicates
the slave address, while the corresponding address code indicates where the
informaon comes from.
A.2.2 Funcon code
It’s the second byte of each communicaon frame. It’s sent by the host and
tells the slave computer what acons should be carried out through funcon
code. The slave will respond, and the funconal code is the same as that sent
Table A.1

16
by the host computer, which indicates that the slave computer has responded
the host and complemented the relave operaon. The instrument supports
the following two funcon codes:
If the data of the slave register 0CH, 0DH is 0000H, 1388H, the slave will
return:
A.2.3 Data area
The data eld will be dierent based on dierent funcon codes. These
data can be numerical values, reference addresses and so on. For dierent
slave computers, both the address and data informaon are dierent, and
the communicaon informaon table should be provided. The host ulizes
communicate command (funcon code 03H and 10H) to read and modify the
data registers of the slave freely. But the data length which is read or write at
one me should not be out of the eecve range of the data register’s address.
A.3 Brief introducon of funcon code
A.3.1 Funcon code 03H: Read register
For example: The slave address which the host intends to read is 01H, the start
register address is two register data of 0CH, sent by the host:
Funcon
code Denion Operaon
03H Read register Read one or several register data
10H Write mulchannel
register Write n 16-bit binary data into n connuous registers
The host sends Send message
Address code 01H
Funcon code 03H
Start register address High byte 00H
low byte 0CH
Register number
High byte 00H
low byte 02H
CRC
low byte 04H
High byte 08H
Table A.2
Table A.3

17
A.3.2 Funcon code 10H: Write mul-port register
For example: The host intends to save data of 0002H, 1388H, 000AH into the
slave address of 01H, the start register address is the three registers of 00H,
sent by the host:
The slave returns Return message
Address code 01H
Funcon code 03H
Bytes 04H
Register 0CH data
High byte 00H
low byte 00H
Register 0DH data
High byte 13H
low byte 88H
CRC check code
low byte F7H
High byte 65H
The host sends Send message
Address code 01H
Funcon code 10H
Register 0CH data
High byte 00H
low byte 00H
Register 0DH data
High byte 00H
low byte 03H
Write bytes 06H
The data to be wrien
in 00H register
High byte 00H
low byte 02H
The data to be wrien
in 01H register
High byte 13H
low byte 88H
The data to be wrien
in 02H register
High byte 00H
low byte 0AH
CRC check cod
low byte 9BH
High byte E9H
Table A.4
Table A.5

18
Returned by the slave
The slave returns Return message
Address code 01H
Funcon code 10H
Start register address
High byte 00H
low byte 00H
Register number
High byte 00H
low byte 03H
Register number
low byte 80H
High byte 08H
A.4 16-digit CRC check code
The host or slave computer can be judged by the check code to see if the
received informaon is correct or not. The interrupon by electronic noises or
other factors may cause errors during informaon transmission.
16-digit CRC check code is calculated by the host, located at the end of the
transmit informaon frame. The slave recalculates the received informaon of
CRC and compares if the calculated CRC goes in line with the received CRC,
if not, there is an error. Only 8 data bits are used during CRC calculaon, both
the start bits and the stop bits are not involved in the calculaon.
The calculaon method of CRC check code is stated as follows:
1) Pre-arrange one 16-digit register as a hexadecimal FFFF ( i.e. fully 1), the
register is called CRC register;
2) Make the rst 8-digit binary data ( the rst byte of the communicaon
informaon frame) with the lower 8 digits of the 16-digit CRC register by XOR
calculaon, the result is placed in CRC register;
3) Shi the content of CRC register rightward by one digit (towards the lower
digit) and ll in the highest digit with 0, check the shi-out digit aer rightward
shiing;
4) If the shi-out digit is 0: repeat step 3) (shi rightward one digit again);
If the shi-out digit is 1: make CRC register with mulnomial A001 by XOR
calculaon
5) Repeat step 3) and 4) unl shi rightward for 8 mes, then all the 8 digits
are processed;
6) Repeat step 2) and 5), process the next byte of the communicaon
informaon frame;
Table A.6

19
Table A.7
Table A.8
7) Aer calculang all the bytes of the communicaon informaon frame
(exclude CRC check code) according to the above steps, the content of the
CRC register to be get is: 16-digit CRC check code
A.5 Error handling
When the meter detects other errors except the error of CRC check code, the
informaon will be returned to the host, the highest digit of the funcon code
is 1, i.e. the funcon code returned to the host from the slave is adding 128
base on the funcon code sent from the host. The error returned from the
slave is as follows:
Error code is as follows:
Address code Addr Funcon
code(top digit is 1) Error code CRC check code low byte
CRC check code
High byte
1 byte 1 byte 1 byte 1 byte 1 byte
01H Illegal funcon code The funcon code received is not supported by the
instrument
02H Illegal register
address
The register address received is out of the register
address range
03H Illegal data value The data value received is out of the corresponding
address data range