FB_HVACNOVRAM_XX

The variables of various types (BOOL, BYTE, DINT, DWORD, INT, LREAL, REAL, SINT, TIME, UDINT, UINT, USINT, WORD) are saved fail-safe in the NOVRAM with the aid of the function blocks FB_HVACNOVRAM_XX.
By way of example the function block FB_HVACNOVRAM_BOOL is described here.

VAR_INPUT

bSetDefault   : BOOL;
bVar_Default  : BOOL;

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

bVar_Default: Default value defined by the user. The variable is of the data type BOOL.

VAR_IN_OUT

bVar  : BOOL;

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

Requirements