BiSS interface explained

The open source 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 and actuator. The BiSS protocol is designed in B mode and C mode (continuously bidirectional 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)^[1]
  • Linear position sensors (absolute encoder)^{[2] [3]}
• Drive control (motor feedback)^{[4] [5]}
• Intelligent sensor system (smart sensors)^[6]
• Robotics^[7]

BiSS features

• Open source
• Hardware compatible for SSI standard (synchronous serial interface)
• Cyclic reading of sensor data up to 64 bit per slave
• 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)^[8]

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)^[9]

History of BiSS in position sensor system

• BiSS was showcased in 2002 by its founders iC-Haus GmbH^[10]
• 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

External links

• BiSS Interface Website
• BiSS C Protocol Description (English)

Notes and References

1. http://www.kuebler.com/german2/service-grundlagen-biss_c_schnittstelle.html Kuebler Group. "BiSS-C interface". Retrieved 2013-7-25
2. http://www.amo-gmbh.com/en/products/linear-measuring-systems/absolute-linear-measuring-system/ AMO GmbH. Retrieved 2013-7-25
3. http://www.renishaw.com/biss "Groundbreaking absolute linear encoder and rotary (angle) encoder is BiSS® protocol compatible". Retrieved 2013-7-25
4. http://www.keb.de/index.php?id=83&L=1 Karl E. Brinkmann GmbH. Retrieved 2013-7-25.
5. http://www.br-automation.com/en/company/press-room/br-servo-drive-with-biss-interface/ "B&R servo drive with BiSS interface". Retrieved 2013-7-25
6. http://www.altera.com/end-markets/industrial/partners/ind-partners.html?GSA_pos=4&WT.oss_r=1&WT.oss=BISS "ALTERA´s Industrial Partner Solutions". Retrieved 2013-7-25
7. http://www.elmomc.com/products/gold-digital-servo-drives-main.htm ELMO Motion Control. Retrieved 2013-7-25.
8. http://www.pepperl-fuchs.de/global/de/16997.htm{{Dead link|date=October 2019 |bot=InternetArchiveBot |fix-attempted=yes}}? Pepperl+Fuchs GmbH. Retrieved 2013-7-25.
9. http://www.hengstler.de/de/technologie/offene_digitale_sensor-_schnittstelle_biss.php Hengstler GmbH. "Open digital sensor interface (BiSS)". Retrieved 2013-7-25.
10. http://www.ichaus.de/product/BiSS%20Interface. iC-Haus GmbH. "BiSS Interface Protocol Description". Retrieved 2013-7-25.