HEIDENHAIN PROFIBUS-DP (DPV2) - Manual (Page 73)

Functionality in the PROFIBUS DPV2 device
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8.8 Scaling function parameters
The scaling function converts the encoder’s physical absolute
position value by means of software in order to change the
resolution of the encoder. The scaling parameters will only be
activated if the parameter Class 4 functionality and Scaling
function control are enabled. The permissible value range for the
scaling is limited by the resolution of the encoder.
Singleturn encoders up to 31 bit and multiturn encoders up to 37
bits resolution are
supported by the encoder gateway. When using encoders with
higher resolution than 31 bits together with the encoder gateway,
telegram 84 must be used.
8.8.1 Measuring units per revolution
This parameter sets the singleturn resolution of the encoder. In
other words it is the number of different measuring steps during
one revolution of the encoder.
Example : For a 13-bit encoder with a single turn resolution of
13 bits the permissible value range for "Measuring
units per revolution" is between 20 and 213 (8192).
Parameter Meaning Data type
Measuring units per
revolution
The single turn resolution in
measuring steps
Unsigned 32
Measuring units per
revolution 64 bit
The single turn resolution in
measuring steps for encoders with a
resolution exceeding 32 bits.
Unsigned 64
Table 39 Single turn scaling parameters
Note: The parameter Measuring units per revolution 64 bit is
only supported by the encoder gateway.
Note: After downloading new scaling parameters, the preset
function must be used to set the encoder starting
point to absolute position 0 or to any required starting
position within the scaled operating range.