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03/11/2016 TR - ECE - BA - DGB - 0065 - 03 Page 59 of 68
7.3.3 Scaling parameters
The scaling parameters can be used to change the physical resolution of the measuring
system. The measuring system supports the gearbox function for round axes.
This means that the Measuring units per revolution and the quotient of Revolutions
Numerator / Revolutions Denominator can be a decimal number. In order that the
measuring system can process this number, the measuring system must include the
option "gearbox 1/100" (see nameplate). Measuring systems without this option may
only have a decimal in the Measuring units per revolution. The quotient of
Revolutions Numerator / Revolutions Denominator must be an exponent of 2.
The position value output is calculated with a zero point correction, the count direction
set and the gearbox parameter entered.
Total Number of Steps (Instance 3, r/w)
Defines the total number of steps of the measuring system before the measuring
system restarts at zero.
The actual upper limit for the Total Number of Steps to be entered is dependent on
the measuring system version and can be calculated with the formula below. As the
value "0" is already counted as a step, the end value = Total Number of Steps - 1.
Total Number of Steps = Measuring units per revolution * Number of revolutions
To calculate, the parameters Measuring units per revolution and the Number of
revolutions can be read on the measuring system nameplate.
Revolutions Numerator / Revolutions Denominator (Instance 4 and 5, r/w)
Together, these two parameters define the Number of revolutions before the
measuring system restarts at zero.
As decimal numbers are not always finite (as is e.g. 3.4), but they may have an infinite
number of digits after the decimal point (e.g. 3.43535355358774...) ) the number of
revolutions is entered as a fraction.
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