TR-Electronic CEV-58 - 9.2.2 Single Measuring Range and 9.2.3 Total Measuring Range

Manufacturer and Profile Specific Objects (CiA DS-406)
Printed in the Federal Republic of Germany © TR-Electronic GmbH 2008, All Rights Reserved
11/17/2009 TR - ECE - BA - DGB - 0069 - 02 Page 109 of 119
9.2.2 Object 6001h: Single measuring range
Displays how many steps the measuring system outputs for one revolution of the
measuring system shaft.
Index 0x6001
Description
Single Measuring Range
Data type
UNSIGNED32
Category
Mandatory
Access
ro
PDO mapping
No
Lower limit
1 step / revolution
Upper limit
32768 steps per revolution (Max. value see nameplate)
Default 4096
9.2.3 Object 6002h: Total measuring range
Defines the total number of steps of the measuring system before the measuring
system restarts at zero.
Index 0x6002
Description
Total Measuring Range
Data type
UNSIGNED32
Category
Mandatory
Access
rw
PDO mapping
No
Lower limit
16 steps
Upper limit
1 073 741 824 steps (30 bit)
Default 16777216
The actual upper limit for the measurement length to be entered in steps 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 = measurement length in
steps - 1.
Total measuring range = Steps per revolution * Number of revolutions
To calculate, the parameters steps/rev. and the number of revolutions can be read
on the measuring system nameplate.
When entering parameter data, ensure that the parameters "Total measuring
range" and "Steps per revolution" are selected such that the quotient of the two
parameters is an exponent of 2.
If this is not the case, the measuring system corrects the measurement length in
steps to the next smallest exponent of 2 revolutions. The Steps per revolution
remains constant.
The newly calculated total measuring range can be read from the Object 6002h and
is always shorter than the specified measurement length. It may therefore occur that
the total number of steps actually required is not achieved and the measuring system
generates a zero transition before it reaches the maximum mechanical distance.