Absolute rotary encoder P**58
Encoder classes of the PROFIBUS user organisation
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Date of issue 01/15/04
14
4.1.2 Class 2 functionality
This switch can be used to limit rotary encoders with Class 2 functionality to Class 1
functionality. In other words, the capability to assign parameters is turned off. To use
the functions of Class 2 rotary encoders, Bit 1 in Octet 9 must be set.
4.1.3 Commissioning diagnostics
This function has no meaning for the Pepperl+Fuchs rotary encoder.
4.1.4 Scaling function
The scaling function enables parameter assignment of resolution per revolution and
the selected overall resolution. This switch should always be turned on if you would
like to use the functions of Class 2 (or of manufacturer specific classes).
4.1.5 Measurement steps per revolution
The "Measurement steps per revolution" is used to assign a desired number of steps
in reference to 1 revolution to the rotary encoder.
If the value of the parameter exceeds the actual (physical) basic resolution of the
encoder, the output value no longer consists of one step. In this case, a parameter
error is displayed and the device does not switch into cyclic data exchange.
Octet 9 Bit 1 Class 2 functionality
0 turned off
1 turned on
Octet 9 Bit 3 Scaling function
0 turned off
1 turned on
Desired number of measurement steps per revolution
Octet 10 11 12 13
Bit 31 ... 24 23 ... 16 15 ... 8 7 ... 0
Data
2
31
to 2
24
2
23
to 2
16
2
15
to 2
8
2
7
to 2
0
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