Safety engineering – Lenze E94AYAE SM301 User Manual
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Safety engineering
Safe bus interfaces
PROFIsafe connection
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EDS94AYAE EN 7.0
1.5.1.2
Description
Addressing
In order that a data telegram reaches the correct node, an unambiguous PROFIsafe target
address is required. If PROFIsafe has been selected as safety bus, the safety address is
simultaneously accepted as PROFIsafe target address. This address must comply with the
corresponding configuration of the safety PLC.
PROFIsafe frame
The PROFIsafe message is sent in the first slot of a PROFIBUS data telegram or in the second
slot of a PROFINET 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
PROFINET data telegram
(as of SM301 V1.1)
Header
PROFIsafe data
Data
Trailer
Slot 2
Slot 1
PROFIsafe data
In the PROFIsafe data one bit each is used to control a certain safety function.
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The structure of the PROFIsafe message is described in the PROFIsafe profile.
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The length of the PROFIsafe message in the SM301 is eight bytes (fixed).
The PROFIsafe messages are structured according to the following system:
PROFIsafe message − V1 mode
Bit offset
Byte offset
7
6
5
4
3
2
1
0
0
PROFIsafe process data
PROFIsafe output data/PROFIsafe input 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