Safety Properties Overview
Calculation example for safety chain PFHd:
- Safety PLC that is the FSoE master.
- EtherCAT cabling etc.
- Two drives configured for STO activation over FSoE.
Contribution to the safety chain of the safety PLC: PFHPLC refer to manufacturer data.
Contribution to the safety chain of using FSoE via EtherCAT cabling etc. is 1.0E-9 1/h.
Contribution to the safety chain of the two drives PFHd is 2 x 1.7E-9 1/h.
Total value: PFHd = PFHPLC + 2 x 1.7E-9 1/h + 1.0E-9 1/h = PFHPLC + 4.4E-9 1/h
Activation by FSoE
Safety Function |
ISO 13849-1 |
IEC 62061 |
Maximum |
Comment |
---|---|---|---|---|
STO |
PLe, Cat.4 |
SIL 3 |
< 10 ms |
|
SS1-t |
PLe, Cat.4 |
SIL 3 |
< 10 ms |
followed by STO* |
SS1-r |
PLe, Cat.4, SIL 3 or |
< 10 ms |
followed by STO* |
|
SS2 |
followed by SOS |
|||
SOS, SSM, SSR, SCA, SDI, |
|
* = configured delay (time to STO) see AXIS#.SAFEPARAM.SS1_#.TIMETOSTO.
Activation by Safety Functions
Safety Function |
ISO 13849-1 |
IEC 62061 |
Maximum |
Comment |
---|---|---|---|---|
SBC with one brake |
PLd, Cat.3 |
SIL 2 |
< 10 ms |
Needs to be configured for |
SBC with two brakes |
PLe, Cat.4 |
SIL 3 |
< 10 ms |
|
SDB single channel |
PLd, Cat.3 |
SIL 2 |
< 10 ms |
|
SDB dual channel |
PLe, Cat.4 |
SIL 3 |
< 10 ms |