Foundation Fieldbus was designed to replace analog connections in the refining, petrochemical and nuclear industries. It was first proposed in 1984 and standardized in 1996. Foundation Fieldbus is a digital, bi-directional communication protocol and has been developed by FieldComm Group.
Foundation Fieldbus has been designed specifically for device-to-device communication. (Devices are also called field instruments and the term is used interchangeably.) Thus, during a host system failure, devices can communicate with each other, maintaining continuous and safe operation.
Foundation Fieldbus provides real-time control between device and host systems. The host system is the system where the software is installed, and it acts as an HMI (Human-Machine Interface). They are usually laptops or any handheld device. Thus, using Foundation Fieldbus, communication can happen between:
- Device-to-device: In this, the devices on the fields directly share and exchange data between them
- Device-to-host systems: In this, communication happens between device and a host system which has HMI software installed on it
Advantages of Foundation Fieldbus
Foundation Fieldbus has many advantages over other protocols. Some of them are:
- Device-to-device communication
- Multiple devices can be connected on a single cable
- Fewer cable trays and I/O cards (input/output)
- Fewer devices
- Better and faster commissioning
- Better and fast diagnostics
- Easy upgrades and addition of devices
- Signal distortion detection and high immunity to noise.
Foundation Fieldbus implementation
To cater to different needs in the environment, Foundation Fieldbus can be implemented in two ways:
- Foundation Fieldbus H1: This operates at 31.25 Kbit/s and is used for connecting field devices and host systems. This implementation used twisted-pair wiring for communication and data transfer. H1 is the most common implementation
- HSE (high-speed Ethernet): As the name says, it operates at 100/1000 Mbit/s. It is generally used for connecting I/O subsystems, gateways and host systems. It uses IEEE (Read more...)
*** This is a Security Bloggers Network syndicated blog from Infosec Resources authored by Nitesh Malviya. Read the original post at: http://feedproxy.google.com/~r/infosecResources/~3/rbb_WK3Fjic/