Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 128)

Safety engineering
Safety functions
Safe PROFIsafe connection
7
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128 EDSLCMX3024-SPS EN 5.0
PROFIsafe frame
The PROFIsafe data is transmitted in the first slot of a PROFIBUS data telegram.
This must be observed for the hardware configuration of the safety PLC!
PROFIBUS data telegram
Header PROFIsafe data Data Trailer
Slot 1 Slot 2
In the PROFIsafe data one bit each is used to control a certain safety function.
PROFIsafe data
The structure of the PROFIsafe data is described in the PROFIsafe profile. The length of the
PROFIsafe data (PROFIsafe message) in slot 1 permanently amounts to 8 bytes in the
SM300. They are composed according to the following structure:
Offset Bit
Byte 7 6 5 4 3 2 1 0
0
PROFIsafe process data
(safe user data)
1
2
3
4
Control byte or status byte
5 Consecutive number
6
CRC2
(Signature consists of PROFIsafe process data and PROFIsafe parameters) 7
Tab. 7-6 Structure of the PROFIsafe data
The meaning of the PROFIsafe process data is separately described for PROFIsafe output
data and PROFIsafe input data. All described bits are evaluated.
Unassigned bits are reserved for future functions and marked with ”-”. These bits must be
transmitted with ”0”.