three-phaseIntroduction to Multi functional Voltage, Current, Power, Energy and Quantity Collector
1 Introduction
XY-EM3Series of multifunctional high-precision three-phase dedicated metering modules, suitable for three-phase three wire and three-phase four wire system applications. modelCapable of accurately measuring various electrical parameters such as phase voltage, current, power, active power, reactive power, apparent power, active power, reactive power, apparent power, power factor, frequency, etc. Meet the various requirements of users for power detection. And it has an RS485 communication port, using Modbus RTU protocol and DL/T 645 protocol, with extremely high cost-effectiveness.
The module is widely used in online monitoring of power consumption, energy-saving renovation, power, communication, transportation, railway, environmental protection, petrochemicals, and steel industries to detect the voltage, current, power, and energy consumption of equipment.
2modulefunction
1) It has electrical parameters such as three-phase voltage, three-phase current, frequency, power factor, active power, reactive power, apparent power, and electrical energy.
2) Dynamic working range5000:1Internally, the measurement error of the dividing line is less than1%
3) Active measurement meets the requirements0.2Level, supportIEC62053-22:2003, GB/T17215.322-2008
4) Reactive power measurement meets the requirements1Level,2Level, supportIEC62053-22:2003, GB/T17215.322-2008
5) haveRS485Interface, built-in communication protocol,MODBUS RTUagreement
6) Voltage resistant isolationDC2000V
7) Isolate and collect current, using high-precision current transformers for collection
8) Customizable switchable (open) transformer
II Technical Parameter
|
Technical Parameter/ Technical parameters |
index/Value |
|
|
input |
working voltage |
12V DC |
|
measure voltage |
AC 0-450V |
|
|
measuring current |
AC 0-5A |
|
|
accuracy |
Voltage accuracy |
0.2% |
|
Electric energy accuracy |
0.5S |
|
|
communication |
RS485 Modbus RTU DL645/T-2007 |
Communication distance 1200rice
|
|
work environment
|
temperature |
-10 -65Celsius |
|
humidity |
5% -95%RH |
|
|
altitude |
less than3000rice |
|
|
install |
Installation method |
35mmRail mounted installation Or perforated and installed on the wall |
|
size |
100*70*25m |
|
|
net weight |
300g |
|
III MODBUSprotocol table
1. MODBUSAgreement Overview
This protocol is a half duplex communication method with a master-slave structure. Each station has its own address code. Establishment and termination of communication links
All data frames are controlled by the main station
1 function code“03”Read multiple register inputs
Message format sent by the host:
|
Host sends |
Byte count |
Sent information |
have pour |
|
Slave address |
1 |
01 |
Send to address:01From the machine |
|
function code |
1 |
03 |
read register |
|
start address |
2 |
0020 |
The starting address is0116 |
|
Length |
3 |
0003 |
read3Register (total)6Bytes) |
|
CRCa sign or object indicating number |
2 |
E5F3 |
Calculated by the hostCRCa sign or object indicating number |
Message format returned by the slave response:
|
Slave response |
Byte count |
Returned information |
have pour |
|
Slave address |
1 |
01 |
From the machine01 |
|
function code |
1 |
03 |
read register |
|
Read words |
1 |
06 |
3A total of registers6One byte |
|
Register data1 |
2 |
1787 |
Address is0020The contents of memory |
|
Register data2 |
2 |
1788 |
Address is0021The contents of memory |
|
Register data3 |
2 |
1789 |
Address is0022The contents of memory |
|
CRCa sign or object indicating number |
2 |
5847 |
Calculated by the slave machineCRCa sign or object indicating number |
2 function code“06”Write a single channel register
Message format sent by the host:
|
Host sends |
Byte count |
Sent information |
give an example |
|
Slave address |
1 |
01 |
Send to address:01From the machine |
|
function code |
1 |
06 |
Write a single channel register |
|
start address |
2 |
0003 |
Register address to be written |
|
Write data |
2 |
0020 |
Corresponding new data |
|
CRCa sign or object indicating number |
2 |
4BAF |
Calculated by the hostCRCa sign or object indicating number |
From machine(PDM)Format of the message returned in response:
The format and data content of the message sent by the host are exactly the same.
Meter information and parameter settings
|
address |
parameter |
Numeric Range |
data type |
read-write property |
|
0000H |
module |
High Eight: Module Model Low Eight: Software Version |
Word |
R |
|
0001H |
basic range |
High Eight: Basic Voltage Low Eight: Basic Current |
Word |
R |
|
0002H |
Module work information |
High eight bits: Module address Low eight bits: Baud rate * 1 |
Word |
R/W |
|
0003H |
Current conversion ratio IBB |
BCDMaximum code can be set to 9999 times. Default: 1x |
Word |
R/W |
|
0004H |
Voltage conversion ratio UBB |
BCDMaximum code can be set to 9999 times. Default: 1x |
Word |
R/W |
|
0005H |
Battery reset to zero |
High eight digits: battery reset Low eight digits: meter initialization * 2 |
Word |
R/W |
|
0006H |
Electrical working status |
There are a total of 12 states*3 |
Word |
R |
|
|
|
|
|
|
Note:* 1 0x04:1200 0x08:2400 0x10:4800 0x40:9600 Other values: 2400
*2Set 0xAA: Clear related information
*3Definition of each status bit
