ACtätype3

ACtätype3 is a standardized protocol and hardware profile for real-time digital control in industrial environments. It defines a modular stack that covers the physical interface, the data-link layer, and application-layer messaging to enable interoperable communication among sensors, controllers, and actuators in automated facilities. The specification emphasizes deterministic timing, low latency, and energy-aware operation, supporting both wired and wireless configurations within a single framework. The name reflects its lineage in the ACtä family and its third-generation design.

ACtätype3 arose from the ACtä Consortium, a collaboration of manufacturers, research groups, and standards bodies. The first public release appeared in the early 2010s, with revisions addressing security, scalability, and cross-vendor interoperability. The current widely deployed revision was finalized around 2016–2018 and remains under active maintenance with open profiles that guide implementations.

Key technical characteristics include a deterministic time-slotted access method, structured message frames, and payloads up to 256 bytes. The system supports device discovery via a 16-bit identifier, role-based access control, and a lightweight security layer providing AES-based encryption for configuration and data channels. Implementations typically offer point-to-point and multicast communication with guaranteed service for critical control traffic.

Applications encompass factory automation, robotics, and smart-grid equipment where predictable timing and interoperability are vital. ACtätype3 positions itself among real-time industrial protocols and bridges to higher-level systems such as manufacturing execution systems and SCADA through standardized bridging profiles. The ecosystem includes reference implementations, conformance tests, and a certification process managed by the standards stewarding body.

Related standards include EtherCAT, CANopen, PROFINET, and OPC UA.