Integer scaler (only when using PDO INT16)

The optional extended range "107 %" has been introduced for Beckhoff analog channels in order to be able to measure slightly above the nominal full scale value (FSV_nom) of e.g. 10 V or 20 mA for commissioning and diagnostic purposes (support depends on the device). Then the channel actually measures up to a defined technical full scale value FSV_techn which is slightly higher than the nominal full scale value FSV_nom.

The definition for 16 bits is as follows:

Fig.42: Defined resolution, 16 bit

Setting:

• Index 80nD:12 = Extended Range Range (default setting)
  The channel measures up to the technical measuring range, which is approximately 107 % of the nominal measuring range.
  For the extended range with 16 bit SINT PDO (16 bits + sign), the PDO value ±30518 (0x7736) has been defined as the nom. FSV = 100 %. Accordingly, the displayable measuring range now extends to 0x7FFF = 32767 ~ 107.37 % of the nominal measuring range.
• Index 80nD:12 = Legacy Range
  The channel measures up to 100 % of the nominal measuring range.
  Accordingly, 0x7FFF = 32767 should be interpreted as 100 % of the nominal FSV.

Fig.43: Setting Index 80nD:12, Legacy Range, Extended Range

Depending on the interface, this then means SINT16 -> Real32 for the conversion in the controller (if the over/underrange PDO is set to the default setting):

Measuring range ±10 V (bipolar)

Fig.44: Measuring range ±10 V

Measuring range 0...10 V (unipolar)

Fig.45: Measuring range 0...10 V (unipolar)