Safety engineering
Safety functions
Safe PROFIsafe connection
1
1.3
1.3.5
1.3-15
EDS94AYAD EN 2.2
Only the bits specified of the PROFIsafe status byte are supported:
Offset Bit
Byte 7 6 5 4 3 2 1 0
4 - - - FV_activate
d
COM-Failure
WD-Timeout
COM-Failure
CRC
- -
Tab. 1.3-14 Structure of the PROFIsafe status byte
Details of the status byte
Name Value Description
COM-Failur
eCRC
0
Status is not active.
1 Status after communication error is active.
COM-Failur
e
WD-Timeo
ut
0 Status is not active.
1 Status after time-out is active.
FV_activate
d
0 The function is not active.
1 The PROFIsafe input data is deactivated.
- 0 Reserved for future extensions
Tab. 1.3-15 Detail specification of the status byte
These PROFIsafe parameters and contents are supported:
PROFIsafe parameters
Name Description Valid contents
F_Source_Add PROFIsafe source address of the safety PLC 0x01 ... 0xFFFE
F_Dest_Add PROFIsafe target address of the safety module 0x01 ... 0x3FF
F_WD_Time PROFIsafe monitoring time of the safety module 110 ... 65535 ms
F_Check_SeqNo Check sequence no. in CRC 0
F_Check_iPar Check iparameters CRC3 in CRC 0
F_SIL Supported SIL (Safety Integrity Level) 0 Æ SIL1
1
Æ SIL2
2
Æ SIL3
F_CRC_Length Length of CRC 1
F_Block_ID Identification of the parameter type 0
F_Par_Version Version of the safety layer 0
F_Par_CRC Cyclic CRC Is calculated
Tab. 1.3-16 Supported PROFIsafe parameters
Incorrect configurations of the PROFIsafe parameters are reported to the
safety PLC by means of a diagnostic telegram ( PROFIBUS Communication
Manual).
Status byte
PROFIsafe parameters
Diagnostic messages
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