Overview
IEC 60870-6-503:2002 (TASE.2 Services and protocol) defines a method for exchanging time‑critical control‑centre data over wide‑area and local‑area networks using a fully ISO‑compliant protocol stack. The standard supports both centralized and distributed control centre architectures and is specifically relevant to Smart Grid and modern utility telecontrol systems. It covers real‑time data indications, control operations, time‑series (historical) data, scheduling and accounting, remote program control and event notification.
Key topics and technical requirements
- Protocol scope and architecture
- Full ISO‑compliant stack designed for telecontrol between control centres and sub‑systems.
- Supports centralized and distributed architectures over WANs and LANs.
- Object and service model
- Detailed TASE.2 object model including associations, bilateral agreements/tables, data value objects, data sets, transfer sets, accounts, information messages, devices, programs, event enrollments and conditions.
- Data exchange mechanisms
- Services for real‑time indications, control commands, time‑series transfers, scheduling and accounting.
- Transfer reporting and reliable transfer semantics to support time‑critical operations.
- Mapping to MMS
- Formal mapping of TASE.2 objects, operations and actions onto MMS (ISO manufacturing/message services) to ensure interoperability with ISO/ITU‑T environments.
- Quality of Service and routing
- Requirements and guidance on QOS, routing and priority handling (annexed).
- Conformance and testing
- Conformance clauses, Protocol Implementation Conformance Statements (PICS) and lists of required MMS services to support interoperable implementations.
Applications and who should use it
- Electric utilities and grid operators - for inter‑control‑centre communications, cross‑utility data exchange and regional/grid‑level telecontrol.
- SCADA and EMS vendors - to implement interoperable TASE.2 servers/clients that exchange real‑time and historical data, control commands and events.
- System integrators and equipment manufacturers - for designing devices and gateways that map local device data into TASE.2 services.
- Smart Grid projects - for reliable wide‑area data exchange, event notification and coordinated control between control centres.
- Regulators and standards bodies - as a reference for interoperability and conformance testing of telecontrol solutions.
Related standards
- IEC 60870 family (telecontrol systems) - broader context for telecontrol profiles.
- MMS / ISO messaging standards - TASE.2 defines mappings to MMS for interoperability.
- ITU‑T recommendations - referenced for protocol compatibility and network layering.
This standard is essential when implementing interoperable telecontrol links between control centres, ensuring reliable, standards‑based exchange of real‑time data, control actions and historical records in Smart Grid environments.