Remote cost control smart water meter (M-BUS communication)

This manual is applicable to the series of remote intelligent cold water meters and hot water meters manufactured by our company. This series of smart water meters is used in conjunction with the electricity meter management system software. The water meter reading system network can be built with wired Mbus and wireless, GPRS, By using local area network and other methods, we will determine the choice of this model of product. Our technical team will communicate with the user to strive for low network construction costs and reliable performance. By using this system, users can remotely view information such as total water consumption and valve switch status. Please read carefully before using this product.

Product Introduction

The remote cost control intelligent water meter complies with the national standard GB/T778-2007 "Measurement of Water Flow in Closed Full Pipelines, Drinking Cold Water Meter and Hot Water Meter" and the industry standard CJ/T133-2012 "IC Card Cold Water Meter" for cost control functions, as well as the functional and technical requirements of Q/0900TQB001-2011 "IC Card Hot Water Meter". The communication protocol adopts 188 protocol related standards. Using DES encryption to achieve remote recharge.

The factory inspection procedures shall comply with JJG162-2009 "Cold Water Meter".

1. Working principle and composition

The remote cost control intelligent water meter is the latest high-tech electromechanical integrated intelligent water meter developed by our company. It is a highly intelligent instrument composed of advanced microcomputer control technology as the core, remote communication and low-power technology as the information transmission medium. It integrates functions such as network cost control, automatic metering, status alarm, and prevention of improper use; It has the characteristics of accurate measurement, reliable performance, compact and reasonable structure, etc; Intelligent water meters with remote cost control functions can be customized according to user needs (remote centralized reading and cost control on/off valves can be achieved through Mbus networking).

The instrument is based on a rotary wing water meter and is equipped with a new type of low-power, high output torque, no pressure loss motor control valve and microcomputer controller. Adopting advanced logic encryption technology and implementing one table one ID number ensures the security and reliability of user data. There will be a qualitative leap in the measurement management work of the property management department and water resources management department in the community.

2. Main features:

• 2.1 Network fee control function: The property management department and water resources management department of the community can remotely control the water meter fee by closing the valve and stopping the water supply through the network.

• 2.2 Display synchronization function: The LCD display and mechanical part display are synchronized, even if the circuit has a fault and the LCD cannot display, it can still refer to the mechanical display.

• 2.3 Alarm function: Battery undervoltage, strong magnetic interference, and other fault information will prompt an alarm on the LCD.

• 2.4 Valve maintenance function: The valve rotates at regular intervals to promptly remove valve scale and ensure valve flexibility.

• 2.5 Anti drip function: For special users, it can be combined with an anti drip water-based meter to achieve anti drip function.

• 2.6 Water inspection function: It can query users who have not purchased water for a long time or have abnormally low water consumption, and identify abnormal users.

• 2.7 Convenient battery replacement: The bottom of the water meter has a specially designed cover for battery replacement, making battery replacement particularly convenient. Batch battery replacement is no longer a problem for water management departments.

Main technical parameters

other

Main technical parameters of vertical and pure water meters

User operation instructions

1. LCD display instructions

Display: Accumulated usage, status of switch valve.

2. The LCD display content is shown in the following figure:

3. Screen display:

When in the open valve state, the LCD screen displays "valve open". When in the closed valve state, the LCD screen displays "valve closed". Through the backend, execute the "open valve" and "close valve" commands, and the water meter will execute the corresponding commands.

The displayed quantity is a six digit integer and a one digit decimal. The specific display meaning is as follows:

Table parameter display code description:

• Err-02 Strong Magnetic Attack

• Err-03 verification error

• Err-08 communication prohibited at low voltage (please replace battery)

• Err-09 table is invalid

4. In the following situations, the water meter valve will close. Please follow the instructions below for handling:

(1) When the water meter is subjected to strong magnetic interference from the outside for 10 seconds, "Err-02" will be displayed in the upper right corner of the screen and the valve will be closed. The valve can only be opened after the external interference is eliminated.

(2) When the water meter detects low voltage in the battery, the screen displays "power shortage" and the valve is closed. Please contact the management department in a timely manner and do not disassemble or assemble it without authorization.

(3) If the valve is closed for other reasons, please check the remaining water level to see if the valve can be remotely opened. If it cannot be opened and the remaining water level is greater than the closing amount, please contact the management department in a timely manner and do not disassemble or assemble it without authorization.

5. The remote recharge water meter adopts a one meter one ID working mode, which can be reused repeatedly.

Installation and usage instructions

• 1. When installing a new pipeline, it is necessary to wash away sand, silt, hemp fibers, and other debris inside the pipeline before installing the meter to avoid water meter malfunction.

• 2. The selection of water meter specifications should be based on the commonly used flow rate, and the diameter of the water meter cannot be determined solely by the diameter of the pipeline. Water meters should not be filled with corrosive liquids, and cold water meters are prohibited from being filled with hot water.

• When installing the water meter, the direction of the arrow on the case must be consistent with the direction of water flow, and the installation of the horizontal water meter must be horizontal. The water flow direction of a vertical water meter must be from bottom to top. The installation location of the water meter should be able to avoid direct sunlight and be in a place that is easy to disassemble and observe. Insulation measures should be taken during the cold winter season.

• When installing a water meter at the inlet of the boiler, a check valve must be installed to prevent hot water and steam from flowing back and damaging the water meter.

• 5. It is strictly prohibited to place any items above the water meter. Pay attention to moisture and prevent water droplets from seeping into the water meter controller, damaging the control system and affecting normal user use.

• 6. When installing the water meter, pay attention to the connection length of the water meter. When the distance between the two ends of the pipeline exceeds the connection length of the water meter, the pipeline spacing should be corrected to meet the connection length of the water meter. Otherwise, if the spacing is too large and forcibly installed, it will cause the threaded end of the water meter connection to break or the pipe joint to break, as well as damage to the connecting nut; If the two end pipelines of the water meter are not on the same axis, other means should be used to correct the pipelines to be on the same axis to meet the installation size of the water meter.

• 7. For accurate measurement, the faucet should be higher than the water meter.

• 8. The water meter should not be directly connected to the pipeline. The water meter should be connected to the pipeline through a connecting pipe, sealing gasket, and connecting nut. When disassembling and assembling, do not forcefully pull it to avoid damaging the watch case.

• When installing a water meter with water-saving and energy-saving features, it is necessary to use a dedicated pipe joint at the inlet to reduce the phenomenon of water meter rotation caused by water pressure fluctuations.

• 10. If the water meter or its accessories are damaged due to failure to strictly follow the installation precautions, all losses shall be borne by the installer.

• 11. Use RVVP 2x2x0.75 or higher wires directly for the network.

Maintenance of smart meters

• After long-term use, errors caused by debris blockage or component wear must be repaired before use. The lead seal on the water meter must not be damaged by the user. If any abnormal phenomenon is found, the water company or management department should be notified for maintenance.

• After the installation and use of the card meter, regular inspections should be carried out to check the operation of the meter and whether the battery voltage is normal.

• After several years of operation, if the display screen shows unclear data, it may be due to insufficient battery power, and the battery should be replaced immediately by specialized technicians.

• If you find that the LCD (liquid crystal display screen) displays garbled characters or abnormal symbol signs, please contact the water sales department.

• 5. As a measuring instrument, the smart water meter must be regularly calibrated according to national standards, and the battery must be replaced during calibration.

Important Notice

1. Regarding the anti freezing of water meters

• The normal working environment temperature of water meters should be above 0 ℃. Before winter and in cold regions, the use and management departments of water meters must ensure that they are properly protected against freezing.

• Any water meter damage, water outage, water leakage, and other related losses caused by improper installation or use of water meters or connecting nuts, pipeline rupture, water meter freezing, freezing, etc. (such as water leakage soaking floors, furniture, equipment, etc.) shall be the responsibility of the water meter manager and user, and the product supplier and manufacturer shall not bear any responsibility.

2. Regarding the issue of inconsistent display between the electronic and mechanical parts

• For smart water meters with mechanical character wheel display, if the electronic part is damaged, causing the electronic part to not display or the value displayed on the mechanical character wheel to be inconsistent, according to the relevant provisions of the National Metrology Law, the calculation of usage should be based on the mechanical character wheel part of the meter.

3. Regarding the issue of negative numbers in products

• If there are individual users who have not purchased water for a long time or have abnormal average water consumption, the management department of the smart meter should promptly conduct household inspections, check the user's water usage status, and promptly identify any abnormal situations.

• The supplier and manufacturer of smart meters shall not be liable for any compensation for water loss caused by the negligence of the smart meter management department in inspection and management.

MBUS Remote Communication Protocol

1、 Communication data format

1. Table type T:

Instrument type and its code

According to the CJ-T188-2004 protocol, set the meter type and its code, and set the water meter to 10H and the electricity meter to 40H.

2. Table address

The table address is represented by 7 bytes A0~A6 in hexadecimal format, and its structure is shown in the following table

• Manufacturer code: Block 7 manufacturer code within the same card structure, used to distinguish different manufacturers. For each manufacturer, this code remains unique and unchanged.

• Table type: used to distinguish this table type, which is divided into the same table type T, facilitating the identification and numbering of different types of tables within a unified manufacturer.

• Address code: The unique identifier for this phenotype within the manufacturer, which is set at the factory and generally not modified.

• Note:

  The address AA AA AA AA AA AA AAH is the bus broadcast address, and all address tables should process the broadcast instruction receiver.

  Broadcast instructions are generally used for meter settings, parameter reading, address reading, etc., and should be used for point-to-point communication when the bus is blocked.

3. Control code

Control code is a type of control instruction. Please refer to the 188 protocol for instructions on control codes.

The relationship between control codes, control instructions, and operation objects is shown in the table below.

4. Data length

The number of bytes in the data field.

5. Data domain

The data field refers to the parameters and data written to or returned from the table side. Its contents are as follows.

6. Verification value

Accumulate the hexadecimal sum of all bytes starting from frame start symbol 68H. Separate for 1 byte.

2、 Communication instruction

1. Read table data

Indicates the cumulative usage and device status of tables with read addresses A0~A6.

Collector ->Table End:

Table end ->Collector:

Status word description:

S1: Reserved

S0: See the table below

Status ST First Byte Definition Table

2. Read table address

Collector ->Table End:

Table end ->Collector:

3. Write valve status

Collector ->Table End:

Table end ->Collector:

4. Write address

Collector ->Table End:

Table end ->Collector: