ABB AC500-S Safety User Manual page 260

Safety programmable logic controllers system

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Configuration and programming

AC500-S Libraries > DPRAM_SM5XX_SEND and DPRAM_SM5XX_REC in SysInt_AC500_V10.lib

It is of no concern to transfer data values from Safety CPU to Non-safety CPU (e.g., for diagnosis and

later visualization on the operator panels), but it is not recommended to transfer data values from Non-

safety CPU to Safety CPU. In the latter case, end-users have to define additional process-specific vali-

dation 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.

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