PROFIsafe version 2.4
For safe communication, CSB..A safety options need a total of 8 bytes for input data and 7 bytes for output data for the PROFIsafe telegram part and occupy them in the process image. Of these, 4 bytes of input data and 3 bytes of output data are the actual safe I/O data (F-useful data). The module with the designation F-I/O module (4/3 byte) is required for data exchange via PROFIsafe with the CSB..A safety options.
For safe communication in the "Technology" profile variant, CSS..A and CSA31A safety options need a total of 10 bytes for input data and 9 bytes for output data for the PROFIsafe telegram part and assign them in the process image. Of these, 6 bytes of input data and 5 bytes of output data are the actual safe I/O data (F-reference data). The module with the designation F-I/O module (6/5 bytes) is required for data exchange via PROFIsafe with the CSS21A, CSS31A and CSA31A safety options.
For safe communication in the "System" profile variant, CSS..A and CSA31A safety options need a total of 16 bytes for input data and 10 bytes for output data for the PROFIsafe telegram part and assign them in the process image. Of these, 12 bytes of input data and 5 bytes of output data are the actual safe I/O data (F-useful data). The module with the designation F-I/O module (12/5 bytes) is required for data exchange via PROFIsafe with the CSS21A, CSS31A and CSA31A safety options.
The remaining 4 bytes are required for the telegram backup according to the PROFIsafe communication.
