ST_MBus_Info

Value information.

TYPE ST_MBus_Info :
STRUCT
  sValue  : STRING(25);
  sUnit   : STRING(20);
  eFct    : E_MBus_Fct;
END_STRUCT
END_TYPE

sValue: Value.

sUnit: Unit.

eFct: Function.

M-Bus devices may supply very large values, which cannot be displayed or can only be displayed inaccurately as numbers on BC/BX systems. The values are therefore supplied as strings (sValue).

LREAL is the preferred format for the conversion to a number format, since conversion to REAL (STRING_TO_REAL) would return inaccurate/invalid values if the DWORD value range is exceed. LREAL values cannot be used on BC/BX systems.

Example view of the values of a heat meter: