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7. System Library

This chapter mainly introduces the system library modules and system library functions related to the description, mainly contains the function of the function block, graphics, parameter descriptions and related examples, this chapter of the relevant function blocks and functions shown on the pin is the class of generic data types, in the IEC61131-3 standard, the class of generic data types with the prefix “ANY” to identify the class of generic data types should comply with the following rules. The following rules apply to the use of generic data types:

  • Directly derived generic datatypes shall be the same as the generic datatypes derived from the base datatype.
  • The generic datatype of a sub-scope datatype shall be ANY_INT.
  • The generic datatype of all other derived datatypes defined in (user-defined datatypes) shall be ANY_DERIVED.

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