List of automation protocols
This includes list of communication network protocols used for process or industrial automation, building automation, substation automation, automatic meter reading and vehicle automation applications
Process automation protocols 
- AS-i – Actuator-sensor interface, a low level 2-wire bus establishing power and communications to basic digital and analog devices
- BSAP – Bristol Standard Asynchronous Protocol, developed by Bristol Babcock Inc.
- CC-Link Industrial Networks – Supported by the CLPA
- CIP (Common Industrial Protocol) – can be treated as application layer common to DeviceNet, CompoNet, ControlNet and EtherNet/IP
- Controller Area Network utilised in many network implementations, including CANopen and DeviceNet
- ControlNet – an implementation of CIP, originally by Allen-Bradley
- DeviceNet – an implementation of CIP, originally by Allen-Bradley
- DirectNet – Koyo / Automation Direct proprietary, yet documented PLC interface
- Ethernet Global Data (EGD) – GE Fanuc PLCs (see also SRTP)
- EtherNet/IP – IP stands for "Industrial Protocol". An implementation of CIP, originally created by Rockwell Automation
- Ethernet Powerlink – an open protocol managed by the Ethernet POWERLINK Standardization Group (EPSG).
- FINS, Omron's protocol for communication over several networks, including ethernet.
- FOUNDATION fieldbus – H1 & HSE
- HART Protocol
- HostLink Protocol, Omron's protocol for communication over serial links.
- Interbus, Phoenix Contact's protocol for communication over serial links, now part of PROFINET IO
- MECHATROLINK – open protocol originally developed by Yaskawa.
- MelsecNet, supported by Mitsubishi Electric.
- Modbus PEMEX
- Modbus Plus
- Modbus RTU or ASCII or TCP
- OSGP – The Open Smart Grid Protocol, a widely use protocol for smart grid devices built on ISO/IEC 14908.1
- Optomux – Serial (RS-422/485) network protocol originally developed by Opto 22 in 1982. The protocol was openly documented and over time used for industrial automation applications.
- PieP – An Open Fieldbus Protocol
- Profibus – by PROFIBUS International.
- PROFINET IO
- RAPIEnet – Real-time Automation Protocols for Industrial Ethernet
- Honeywell SDS – Smart Distributed System – Originally developed by Honeywell. Currently supported by Holjeron.
- SERCOS III, Ethernet-based version of SERCOS real-time interface standard
- SERCOS interface, Open Protocol for hard real-time control of motion and I/O
- GE SRTP – GE Fanuc PLCs
- Sinec H1 – Siemens
- SynqNet – Danaher
- TTEthernet – TTTech
Industrial control system protocols 
Building automation protocols 
- 1-Wire – from Dallas/Maxim
- BACnet – for building automation, designed by committee ASHRAE.
- CC-Link Industrial Networks, supported by Mitsubishi Electric
- EnOcean – Low Power Wireless protocol for energy harvesting and very lower power devices.
- Konnex (KNX) – previously AHB/EIB
- LonTalk – protocol for LonWorks technology by Echelon Corporation
- Modbus RTU or ASCII or TCP
- xAP – Open protocol
- X10 – Open industry standard
- ZigBee – Open protocol
Power system automation protocols 
- DNP3 – Distributed Network Protocol
- IEC 60870-5
- IEC 61850
- IEC 62351 – Security for IEC 60870, 61850, DNP3 & ICCP protocols
Automatic meter reading protocols 
Automobile / Vehicle protocol buses 
- Controller Area Network (CAN) – an inexpensive low-speed serial bus for interconnecting automotive components
- DC-BUS – automotive power-line communication multiplexed network
- FlexRay – a general purpose high-speed protocol with safety-critical features
- J1708 – RS-485 based SAE specification used in commercial vehicles, agriculture, and heavy equipment.
- J1939 and ISO11783 – an adaptation of CAN for agricultural and commercial vehicles
- Keyword Protocol 2000 (KWP2000) – a protocol for automotive diagnostic devices (runs either on a serial line or over CAN)
- Local Interconnect Network (LIN) – a very low cost in-vehicle sub-network
- Media Oriented Systems Transport (MOST) – a high-speed multimedia interface
- Vehicle Area Network (VAN)
See also 
- "automationdirect.com". automationdirect.com. Retrieved 2012-09-01.
- "Optomux Protocol Guide". Opto22.com. 2012-01-08. Retrieved 2012-09-01.
- "Benefits of power-line communication (PLC) multiplexing automotive network". Yamar.com. Retrieved 2012-09-01.
- ProSoft Technology – Automation Connectivity Solutions
- Kepware Technologies – Communications for Automation
- Implementation of automation protocols in MORSE system
- SCADA/HMI with built-in automation protocols
- Modbus-IDA site
- Schneider Automation site
- MBX Driver Suite – The global standard Modbus, Modbus Plus, Modbus/TCP communication software from Cyberlogic and Schneider Electric
- NovaTech Orion Automation Platform and Protocol Converter.
- Open Modbus/TCP Specification
- ODVA—The organization responsible for DeviceNet, ControlNet, and EtherNet/IP
- PROFIBUS & PROFINET International—the organization responsible for PROFIBUS and PROFINET
- EGD protocol specification, dead link
- EGD source code, dead link
- See how EGD works, dead link
- Networks supported by Mitsubishi Electric
- OPC Foundation
- SERCOS North America
- SERCOS International e.V.
- PieP Project Site @ Source Forge
Free software exists for EtherNet/IP (Unconnected explicit messaging)
Free software exists for Modbus, Modbus Plus and Modbus/TCP