IEC 60870-5-104 (IEC104 for short) as a remote communication protocol, is part of the IEC 60870 5 standard series, in electrical engineering and power system automation, between the two systems to send basic teleoperation information communication environment variables, mainly used for power system remote control and monitoring. The meter address is what it is, and how to view ni?
Point meter is an important concept in the IEC104 protocol, which refers to the collection of all telecommunication (digital input), telemetry (analog input), remote control (digital output), and telecontrol (analog output) points in the system. Each point has a unique address that is used to identify and access that point in communications.
Components of a point table address
In the IEC104 protocol, point table addresses can be categorized into two main types:
Information Object Address (IOA, Information Object Address): used to identify a single telecommunication, telemetry, telecontrol or telemodulation point.
Common Address (CA, Common Address): used to identify an entire station or device.
In the IEC104 protocol, the Information Object Address is usually three bytes (24 bits) and the Common Address is two bytes (16 bits). The specific format is as follows:
Information object address: three bytes from low to high, denoted as IOA1, IOA2, IOA3.
Public address: two bytes from low to high, denoted as CA1, CA2.
How to View IEC104 Point Table Addresses
In practice, point table addresses are usually stored in a point table configuration file. The configuration file format may vary from vendor to vendor or system to system, but will typically contain the following information:
Point name: describes the function or name of the point.
Point type: e.g., telecommunication, telemetry, telecontrol, or telemodulation.
Information object address: a unique address that identifies the point.
Public address: identifies the station or device to which the point belongs.
Example Point List
The following is a simple example of a point table:
| Point Name | Point Type | Information Object Address | Public Address |
| Telecommunication point 1 | Telecommunication | 000001 | 0001 |
| Telemetry point 1 | Telemetry | 000002 | 0001 |
| Remote control point 1 | Remote control | 000003 | 0001 |
| Telecontrol point 1 | Telecontrol | 000004 | 0001 |
Explanation of point table address
Telecommunication point 1: The information object address is 000001 and the public address is 0001.
Telemetry point 1: The information object address is 000002 and the public address is 0001.
Remote control point 1: information object address is 000003, public address is 0001.
Telecontrol point 1: the information object address is 000004 and the public address is 0001.
Problems and Solutions
Address Conflict: Two or more points use the same information object address or public address, causing the system to be unable to properly distinguish and access these points. The solution involves checking and updating the point table configuration file to ensure that each point has a unique address.
Address misconfiguration: May result in communication failures or data errors. During configuration and debugging, double-check the point table configuration file and system configuration to ensure that the address configuration is correct.
Conclusão
Point table address is used to uniquely identify the various monitoring and control points in the system, is the basis for data exchange, provides a good logical structure and flexibility for the system.IEC 60870-5-104 is an important industrial communication protocol standard developed by the International Electrotechnical Commission, which provides technical support for the construction of a high degree of integration and intelligent automation system. In conclusion, IEC 104 is a powerful and mature industrial communication protocol standard, which plays an important role in the field of automation.
