In this part, the following conventions are used:

  • The abbreviation "F" is an indication for safety related items, technologies, systems, and units (fail-safe, functional safe).
  • The default data that are used in case of unit failures or errors, are called fail-safe substitute Values (FSV) and are set to binary "0".
  • Reserved bit ("res") are set to "0" and ignored by the receiver for avoiding problems with future versions of OPC UA Safety.
  • Terms and names are often written in PascalCase (the practice of writing compound words or phrases in which the elements are joined without spaces, with each element's initial letter capitalized within the compound). Terms or names where two capital letters of abbreviations are in sequence or for separation to a suffix are written with underscores in between.
  • The notation 0x… represents a hexadecimal value.