Process data interpretation

With regard to the output of the cyclic process data, the whole measuring range presents itself as follows:

The channel for this box features an option to set the measuring range either to the conventional Beckhoff type: "nominal full-scale value = PDO end value: Legacy Range" or the new method "technical full-scale value = PDO end value: Extended Range".

• For Extended Range mode applies:
• Technical full scale value = PDO end value 0x007FFFFF.
• For information purposes, the channel can measure up to approx. 107% beyond the nominal range, although accuracy specifications etc. are then no longer valid.
• Outside the nominal measuring range, the Overrange or Underrange bit is set.
• For further diagnosis, the error bit and the error LED are set, if configurable limits are exceeded. By default the limits are set to the technical measuring range, although they can be narrowed by the customer.
  Example: In 4…20 mA measuring mode, the limit is set to 0 mA, although it can be customized in the CoE, e.g. to 3.6 mA, in order to enable earlier detection of sensor faults.
• The Extended Range mode is the default setting for the box.
• The mode is defined through the non-periodic rational LSB step size and an integer end value. The step size can therefore be used in a PLC program without rounding error.
• For Legacy Range mode applies:
• Nominal full scale value = PDO end value.
• Compatible with existing interface from EL30xx/EL31xx/EL36xx.
• Overrange/Underrange, Error bit and Error LED are set simultaneously if the nominal/technical measuring range is exceeded.
• Can be optionally activated in the box.
• The mode is defined by an integer end value; not a whole number of the LSB step is accepted for it.