MMS protocol

In the context of IEC 61850, MMS stands for Manufacturing Message Specification. MMS is a key protocol used in the communication systems of electrical substations under the IEC 61850 standard. The IEC 61850 standard defines the communication protocols and architecture for the automation of electrical substations, aiming to provide interoperability and a reliable means of communication between different devices and systems within the substation and beyond.

MMS is utilized within the IEC 61850 framework for the following main purposes:

  1. Device Communication: MMS facilitates communication between intelligent electronic devices (IEDs) within the substation. These devices can include protective relays, switches, transformers, and other components critical to the operation of the electrical grid.
  2. Data Exchange: It is used for exchanging data, including real-time and historical measurements, device status, and control commands. MMS enables the structured and efficient transfer of this information, supporting the automation and monitoring processes within the substation.
  3. Interoperability: MMS plays a crucial role in ensuring interoperability among different manufacturers’ devices. By adhering to the MMS protocol, devices from different vendors can communicate and work together seamlessly, which is essential for the standardized and harmonious operation of substations.
  4. Remote Control and Monitoring: Through MMS, operators can perform remote control operations and monitor the status of various substation components. This includes the ability to send control commands to IEDs, receive alarms and event notifications, and access device status information.
  5. Configuration and Management: MMS is also used for configuration and management tasks, allowing for the retrieval of device configurations, setting parameters, and managing device identities and capabilities within the substation network.
  6. Abstract Communication Service Interface (ACSI): MMS is part of the Abstract Communication Service Interface specified in IEC 61850, which defines a set of services for communication between IEDs. ACSI abstracts the details of the underlying communication protocols, including MMS, providing a consistent interface for application developers.

MMS in the context of IEC 61850 is not to be confused with the multimedia messaging service used in mobile communications. It is a protocol designed specifically for industrial applications, providing a robust framework for communication and data exchange in complex and critical environments like electrical substations. The use of MMS within IEC 61850 enables the integration of advanced automation, protection, and monitoring functions, contributing to the efficiency, reliability, and safety of electrical power systems.