DL/T 645-2007
Purpose
This plugin reads multifunction-meter data by DL/T 645-2007 data identifier and performs controlled close-permit or trip operations after password and operator-code configuration.
Open the plugin and supported scope
Create a TCP client, TCP server, serial, or UDP channel, then create a device using DL/T 645-2007. Supported types include Boolean, Byte, common integers, Float, Double, String, and Decimal.
Plugin properties
DL/T 645-2007 also inherits common read/write timeout, retry, write-priority, serial/TCP, and DTU settings; see Collection Configuration.
| Setting | Default | Description |
|---|---|---|
| Default address | 111111111111 | 12-digit meter communication address used when a variable does not override it. |
| Operator code | - | Four-byte hexadecimal operator code required by control operations. |
| Password | - | Four-byte hexadecimal password. Trip/close supports only level-02 plaintext passwords. Keep it out of screenshots and logs. |
| Preamble | FEFEFEFE | Wake-up prefix sent before the frame. |
| Control validity | 5 minutes | Range 1 to 60; used to create the trip/close deadline. |
| DTU ID | - | Used for a DTU service connection. |
Data-identifier addresses
Enter an eight-digit data identifier from the meter point list. Use S=123456789012 to override the meter address for one variable, and R=false to disable data-byte reversal (the default is R=true), for example S=123456789012;02010100;R=false. One address may contain only one data identifier, station override, and reversal option.
| Address | Common meaning |
|---|---|
02010100 | Phase-A voltage |
02020100 | Phase-A current |
02030000 | Instantaneous total active power |
00000000 | Current combined active total energy |
00010000 | Current forward active total energy |
Special methods
| Method | Purpose | Configuration |
|---|---|---|
ClosePermitAsync | Permit closing | Select the method, set address to [], set protection to write-only; any write triggers it. |
TripAsync | Trip | Select the method, set address to [], set protection to write-only; any write triggers it. |
Trip and close change the power state. Verify meter address, password, operator code, validity, user permission, and site safety first.
Functions
| Function | Purpose |
|---|---|
| Read and write | Read a confirmed point and write only to an approved test point. |
| Messages | View sent and received frames, protocol fields, and error details. |
Device debug
Open Development Configuration → Collection Configuration, select the DL/T 645-2007 device and click More Functions, then open Debug.
| Feature | Purpose |
|---|---|
| Read/Write | Reads one or multiple data identifiers. Writes are only for approved test data. |
| Messages | Shows 645 requests, responses, and checksum results. |
The common Overview screenshot is not repeated. Execute trip/close through the configured special-method variable, not a normal data identifier.
Verify the configuration
- Read one known data identifier and compare it with the meter display.
- Check meter address, control code, and checksum under Messages.
- Perform trip/close only in an approved site test and verify physical feedback.
Troubleshooting
| Symptom | Check |
|---|---|
| Meter does not respond | Channel, baud rate, default address, preamble, and network/serial link. |
| Data identifier fails | Identifier, meter support, data type, and permission. |
| Value is incorrect | Identifier, scaling, decimal places, and data type. |
| Trip/close fails | Level-02 password, operator code, validity, meter address, control permission, and device state. |
Related links
- Collection Configuration: Common channel, device, and variable operations.
- Plugin Manual Index: Other plugins.