The

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

BiSS interface (bidirectional/serial/synchronous) is based on a protocol which implements a real time interface. It enables a secure serial digital communication between controller,

sensor A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon. In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends ...

and

actuator An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. In simple terms, it is a "mover". An actuator requires a control device (controlled by control signal) a ...

. The BiSS protocol is designed in B mode and C mode (continuous mode). It is used in industrial applications which require transfer rates, safety, flexibility and a minimized implementation effort. The BiSS interface has roots in SSI and a simplified INTERBUS. The proprietary standards, Hiperface and EnDat are competing solutions.

Application

* Position sensor system ** Rotary encoder ( absolute encoder) ** Linear position sensors ( absolute encoder) * Drive control (motor feedback) * Intelligent

system (smart sensors) * Robotics

BiSS features

* Open source * Hardware compatible for SSI standard (synchronous serial interface) * Cyclic reading of sensor data up to 64 bit per

slave Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...

* Transmission of status data, parameter, measured temperature value, configuration description, etc. * Isochronal, real time capable data transmission * bidirectional communication with two unidirectional lines * Point-to-point or multi-slave networks * Maximum user data rate, transmission data depending on driver and line of e.g. RS-422: 10 MHz, 1 km; LVDS: 100 Mbit/s * Independent of the applied physical layer * CRC secured communication (sensor data and control data secured separately)

Characteristics of BiSS C

* Continuous sensor data transmission without interruption while using control data * Activation of actuators in bus during sensor data transmission * Broader standardization through BiSS profiles, BiSS EDS (electronic data sheet), BiSS USER DATA, etc. * Full compatibility of BiSS identifier (already defined in BiSS B)

History of BiSS in position sensor system

* BiSS was showcased in 2002 by its founders iC-Haus GmbHhttp://www.ichaus.de/product/BiSS%20Interface. iC-Haus GmbH. "BiSS Interface Protocol Description". Retrieved 2013-7-25. * Since BiSS B is not motor feedback compatible, BiSS C has been preferred in the market * All patent cases against BiSS B were dropped in 2012: ** EP 0790489B1: "Mode switching by frequency comparison" ** DE 19701310B4: "Mode switching as such" ** EP 1168120B1: "Block transmission of additional uncritical data" * Multi-cycle data (MCD) are no longer utilized in the position sensor system with BiSS * Because BiSS utilizes the PHY of SSI RS-422) it develops as the successor of the SSI interface in automation

References

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External links

BiSS Interface Website

BiSS C Protocol Description (English)
Communications protocols