FB_HVACPersistent_XX

The variables of various types (BOOL, BYTE, DINT, DWORD, INT, LREAL, REAL, SINT, STRING, STRUCT, TIME, UDINT, UINT, USINT, WORD) are saved persistently with the aid of the function blocks FB_HVACPersistent_XX.
By way of example the function block FB_HVACPersistent_BYTE is described here.

VAR_INPUT

bSetDefault    : BOOL;
byVar_Default  : BYTE;

bSetDefault: If the variable is TRUE, the value of the input variable byVar_Default is adopted.

byVar_Default: Default value defined by the user. The variable is of the data type BYTE.

VAR_IN_OUT

byVar  : BYTE;

byVar: Variable that is programmed fail-safe by the user.

Requirements