ABB AC500-S Safety User Manual page 393
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Also See for AC500-S:
- Safety user manual (452 pages) ,
- Application note (24 pages) ,
- System manual (119 pages)
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C.5
Data exchange between safety CPU and V3 non-safety CPU
Data exchange options between safety CPU and V3 non-safety CPU:
●
Acyclic non-safe data exchange: several safety CPU cycles needed to transfer the data,
max. 84 bytes each direction
on page 394
●
Cyclic non-safe data exchange: max. 3 safety CPU cycles needed to transfer the data, max.
2 kB each direction
2020/06/19
Ä Appendix C.5.1 "Acyclic non-safe data exchange"
Ä Appendix C.5.2 "Cyclic non-safe data exchange" on page 395
DANGER!
It is not recommended to transfer data values from non-safety CPU to safety
CPU. If doing so, end-users have to define additional process-specific validation
procedures in the safety program to check the correctness of the transferred
non-safety data, if they would like to use those non-safety values for safety
functions.
It is of no concern to transfer data values from safety CPU to non-safety CPU,
e.g., for diagnosis and later visualization on operator panels.
3ADR025091M0208, 12, en_US
Usage of safety CPU with V3 non-safety CPU PM56xx
393
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