Integer scaler (only when using PDO SINT16)

The optional extended range “107 %” has been introduced in Beckhoff analog channels in order to be able to measure slightly above the nominal full scale value (FSV_nom) of 3 V for commissioning and diagnostic purposes (support depends on the device). of 3 V 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.170: Defined resolution, 16-bit

Setting:

• Index 0x80nD:12 = "Extended Range" (default setting)
  The channel measures up to the technical measuring range, which is approx. 107 % of the nom. 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 0x80nD: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.171: Setting index 0x80nD: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 ±3 V (bipolar)

Fig.172: Measuring range ±3 V