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Baumer_BiSS-C_MA_EN_V1 00.docx 

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www.baumer.com 

25.08.2016 

6  Control communication 

The control frame 

The control frame enables the protected and confirmed reading and writing of the register of a slave and the 
protected and confirmed sending of commands to the slave. The control frame results from a count of BiSS 
frames generating and transmitting sensor data. 
The register access or the command is always carried out at the end of the cycle of the last DCM bit, i.e. with 
the  expiration  of  the  BiSS  timeout  in  the  slave.  The  control  frame  can  be  canceled  at  any  time  with  the 
transmission  of  14  “0“  bits.  The  start  bit  of  a  control  frame  must  be  preceded  by  at  least  14  cycles  with  
CDM = “0“. 
 
 

CRC checking 

Control communication also uses a checksum for transmission checking. The CRC polynomial used is the 
same as in protected SCD data transmission: 
X^(6) + X^(1) + 1 
 
With it, 6 CRC bits are available which are transmitted inverted. Calculation is carried out with the starting 
value  zero  via  the  addressing  sequence  or  the  data  bits  beginning  with  the  most  significant  bit,  always 
excluding the start bit. 
 
Note: Before each control frame at least 14 bits with CDM=“0“ must be transmitted.  
 
 

 

Содержание EFL580

Страница 1: ...08 16 174 02 066 1 Subject to modification in technic and design www baumer com Errors and omissions excepted Manual Absolute encoders with BiSS C interface...

Страница 2: ...1 Introduction 4 1 1 Product assignment 4 2 Safety and operating instructions 5 3 Introduction 6 4 Functional description 7 4 1 The BiSS Frame 7 4 2 Processing time per request 7 4 3 Bus reset 7 5 Sen...

Страница 3: ...tion compiled in the present manual Baumer nor the author will accept any liability for direct or indirect damages resulting from the use of the present information At any time we should be pleased re...

Страница 4: ...1 1 Product assignment Product Description GBPAH Multiturn through hollow shaft GBPAS Multiturn blind hollow shaft GBUAH Singleturn through hollow shaft GBUAS Singleturn blind hollow shaft GBPAW Mult...

Страница 5: ...upling Hollow shaft Open clamping ring completely before mounting the encoder Foreign objects must be kept at a sufficient distance from the stator coupling The stator coupling is not allowed to have...

Страница 6: ...ast and safe exporting of sensor data and simultaneous accessing of the slave registers In the point to point configuration only one device with one slave sensor is operated on the master The BiSS int...

Страница 7: ...Master is sent to all slaves via the line MA as an inverse signal level of the BiSS timeout The addressed slave responds with the CDS Control Data Slave bit which is always transmitted in the first b...

Страница 8: ...f all data channels The slaves can only correctly signal the BiSS timeout in the BiSS frame if all SLO lines have the signal level 0 at the start of the BiSS timeout The master sends a leading zero be...

Страница 9: ...ation of the BiSS timeout in the slave The control frame can be canceled at any time with the transmission of 14 0 bits The start bit of a control frame must be preceded by at least 14 cycles with CDM...

Страница 10: ...8 is reading the encoder error status 0x00 mains no error present Bit 0 is the only one to signal error ERR_L infrared LED current limit error in the BiSS C frame The warning bit is not used Transmiss...

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