Parameterization and configuration
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TR-Electronic GmbH 1998, All Rights Reserved
Printed in the Federal Republic of Germany
Page 24 of 31
TR - ECE - BA - GB - 0014 - 03
03/09/2010
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.
EDS-file 8192
EDS-file 4096
lower limit
16 steps
16 steps
upper limit
33554432 steps (25 bit)
16777216 steps (24 bit)
default
33554432 16777216
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.
numerator lower limit
1
numerator upper limit
256 000
default numerator
4096
denominator lower limit
1
denominator upper limit
99
default denominator
1
