DL-T645-2007 plugin for Data Loggers
Latest version: 5.0.1 build 1126. November 28, 2025.
The DL-T645-2007 plugin is designed for engineers and system integrators who need reliable access to data from Chinese multifunction energy meters. These meters are used in industrial plants, commercial buildings, and utility infrastructures. The plugin supports many DL-T645-2007 compatible devices, such as single-phase meters and multi-rate watt-hour meters. It focuses on reading current meter values and presenting them in a form that is easy to log, export, and integrate with other systems.
The DL-T645-2007 protocol uses a half-duplex master-slave communication model. A server with our data logger works as the master. One or more meters work as slaves. The master sends requests, and meters respond with their measured values. The plugin automates this process. It builds requests, sends them over serial or TCP/IP connections, waits for responses, validates the data, and then passes the parsed values to your application, database or SCADA software.
The plugin can read current data from any DL-T645-2007 compatible device, as long as the meter follows the standard part of the protocol used for current value requests. It can poll a single device or many devices in parallel. For example, you can read the total active energy from 50 meters every 10 seconds and log the results to a database or file. If you need different intervals, each request can have its own polling period, such as 1 second for main feeder meters and 60 seconds for less critical meters.
Using the plugin with Advanced Serial Data Logger
The DL-T645-2007 plugin works well with Advanced Serial Data Logger. In this configuration, Advanced Serial Data Logger handles serial port access and logging, while this parser plugin interprets the DL-T645-2007 frames. The plugin parses the frames, extracts values, and passes them as named fields. This allows you to store each energy or power value in a structured way. You can then export to CSV, database, OPC, or other targets supported by the logger.
Example with serial communication:
Incoming data (raw DL-T645-2007 frame from the meter):
68 12 34 56 78 90 12 68 91 08 33 33 34 35 36 37 38 39 CS 16
After parsing by the plugin, Advanced Serial Data Logger can provide:
DATE_TIME_STAMP = 2025-11-28 08:00:00
DeviceAddress = 123456789012
FunctionCode = 0x91
TotalActiveEnergy_kWh = 12345.67
You can configure the logger to export this parsed data to a CSV file with one line per read cycle:
DATE_TIME_STAMP;DeviceAddress;TotalActiveEnergy_kWh 2025-11-28 08:00:00;123456789012;12345.67
This simple structure lets you import data into reporting tools, spreadsheets, or your own analysis scripts. You can also group data by device address and time range to build reports for daily, weekly, or monthly consumption.
Using the plugin with Advanced TCP/IP Data Logger
The plugin also integrates with Advanced TCP/IP Data Logger. This is required when meters are connected through Ethernet or GPRS gateways that convert DL-T645-2007 traffic to TCP or UDP. The logger can receive data from one or more IP addresses and ports.
Key features
- Reads current data from DL-T645-2007 compatible energy meters (single-phase and multi-rate models).
- Works with both serial interfaces and TCP/IP gateways for flexible connectivity.
- Supports polling of multiple devices at the same time with individual intervals.
- Allows several device addresses in one request to simplify configuration on shared buses.
- Configurable timeout handling for stable operation on slow or unreliable communication links.
Summary
The DL-T645-2007 plugin provides a practical way to read and structure energy meter data without manual protocol decoding. It works in our data loggers to build scalable, reliable energy monitoring and reporting systems.
By using flexible request queues, support for many devices, and simple export formats, the plugin helps engineers reduce setup time and get consistent meter data into their existing software tools and databases.
How to enable this plugin
The figure below shows how to select the plugin on the "Modules" page.
Fig.1. Selecting the plugin.
How to configure the plugin
The figure below shows how to configure the plugin. Please, look at the documentation for the full description of all settings.
Fig.2. Configuring the plugin.
Read more about other plugins:
All plugins | MODBUS RTU, MODBUS TCP, MODBUS ASCII | M-Bus | Bacnet/IP | IEC 62056-21 | DLMS/COSEM | DL-T645-2007 | CJ/T 188-2004 | Kamstrup [KMP protocol]