Welcome~YIWU DOWLER IMPORT AND EXPORT COMPANY
  +8619941400445  meter@meterchina.top   AM 8:00 - PM 18:00

Home > Water Meter Spare Parts

  • RS485 water meter
  • RS485 water meter
  • RS485 water meter
RS485 water meterRS485 water meterRS485 water meter

RS485 water meter

  • DN15-DN40
  • ISO4064, ISO9001
  • CLASS B
  • Product description：RS485 water meter,modbus water meter,Piston Water Meter,Plastic Nylon Water Meter,Kent Water Meter,Volumetric Piston Water ,Volume Water Meter,Class C Water Meter,Plastic water meter,Multi Jet Water M
  • INQUIRY

Modbus water meter communication protocol

Introduction of RS485 module

Four wires: RS485 needs four wires, of which the second wire is rs485a, rs485b, the second wire is positive and negative 12V power line, the pulse signal line is not divided into positive and negative poles, and the 485 communication line is connected. Red (12V positive), blue (12V negative), yellow (485a), green (485b). Note: wiring must be done carefully! An error will result in damage to the instrument module.

The module integrates the pulse counting module, and outputs the accumulated pulse in RS485 or MBus mode, generally using RS485 Modbus communication protocol or 188 protocol.

When the communication line is long, the cross-sectional area of the communication wire should be increased, the communication line should avoid high-power electrical equipment and strong interference sources, and do a good job in waterproof protection.

Communication settings

1. Baud rate: 9600 / 4800 / 1200 (default 9600 cannot be changed)

2. Check: no check (default no check)

3. Data bit: 8

4. Stop bit: 1

Modbus Protocol

1. Read operation (03h)

Address

Function code

First register high bit address

First register low address

The high order of the number of registers

The low order of the number of registers

CRC check low bit

CRC check high bit

XX

03

XX

XX

XX

XX

XX

XX

2. Read operation reply（03H）

Address

Function code

Number of bytes

Data high byte

……..

Data low byte

CRC check low bit

CRC check high bit

XX

03

XX

XX

……..

XX

XX

XX

3. Write operation (06h)

Address

Function code

First register high bit address

First register low address

Data high byte

Data low byte

CRC check low bit

CRC check high bit

XX

06

XX

XX

……

XX

XX

XX

4. Write operation reply（06H）

Address

Function code

First register high bit address

First register low address

Data high byte

Data low byte

CRC check low bit

CRC check high bit

XX

06

XX

XX

……

XX

XX

XX

5. Write operation (10h)

Address

Function code

First register high bit address

First register low address

The high order of the number of registers

The low order of the number of registers

Number of bytes

Data high byte

……

Data low byte

CRC check low bit

CRC check high bit

XX

10

XX

XX

XX

XX

XX

XX

……

XX

XX

XX

6. Write operation reply (10h)

Address

Function code

First register high bit address

First register low address

The high order of the number of registers

The low order of the number of registers

CRC check low bit

CRC check high bit

XX

10

XX

XX

XX

XX

XX

XX

7. Exception code

Address

Function code

Exception code

CRC check low bit

CRC check high bit

XX

XX

01h illegal function

02h illegal data address

03h illegal data value

XX

XX

8. Register address

Name

Register address

Number of bytes

operation

remarks

Device address

0200H

2

Read / write

Not recommended

Cumulative flow

0202H

4

Read / write

Be careful:

The exception code is the highest bit plus 1 of the normal function code. For example, the exception code of the read operation 03h is 83h, the exception code of the write single word 06h is 86h, and the exception code of the write multiple word 10h is 90h.

The cumulative flow is a 4-byte hexadecimal number, with the high bit first and the low bit last. The cumulative flow uses 32-bit data (2 words) without sign.

For example, if the actual data is 123456, the high bit word is saved as 0x0001, and the low bit word is saved as 0xe240.

Unit of measurement: according to the ratio you write, this meter does not participate in the calculation, only records the actual pulse value.

For example:

Suppose the table address is 01 (table address range 1-247)

1. Write the base number of water meter 123456 (hexadecimal: 01e240h)

01 10 02 00 02 00 01 E2 40 73 86 13 bytes

Write the base number of water meter to return: 01 10 02 00 02 E1 B0 8 bytes

Exception: 01 90 03 0C 01 5 bytes (illegal data value)

2. Water meter reading: 01 03 02 00 02 64 73 8 bytes

Read Cumulative Return: 01 03 04 00 01 E2 40 E2 A3 9 bytes

Exception: 01 83 03 01 31 5 bytes

3. Reading water meter address: 00 03 02 00 01 84 63 8 bytes

Return: 01 03 02 00 01 79 84 7 bytes

be careful! When reading the water meter address, only one water meter can be connected to the bus.

MOQ:
We will accept your trial order or sample order.
Logo:
Customers could customize their logo or lable on the water meter.
Sample Policy:
We will send samples to you( by TNT or DHL or EMS) for your confirmation within 2-7  days after we come to an agreement.
Delivery time:
Start shipping within 10--25 days after signing the contract.
Payment terms:
L/C, T/T, Western Union, MoneyGram, Paypal.
Shipping:
We can arrange the shipping by Courier ( DHL, UPS, Fedex , TNT etc. ), by air or by sea for you.
List Of Competitive Advantage:
1. We are factory, can provide you high quality, best price
2. Professional employee and effective management
3. Professional trading service
4. Prompt delivery
5. Good service & reputation
6. Large production line


Thank you. If you require samples, we can send them to you after confirmation.
Hope we can have cooperation, welcome to visit!
PREVIOUS：Plastic Multi Jet Water Meter NEXT：Volumetric piston water meter

Related Products

Search

Latest News

Contact

CONTACT US

Contact:James Fang

Phone: +8619941400445

Email：meter@meterchina.top

Add：Jiangdong Street, Yiwu, Jinhua, Zhejiang, China

  Send Email

WhatsApp

LiveChatclose