BEI Sensors MHK5 Absolute Hollow Shaft Encoder - Manual (Page 13)

4.1.1 Code sequence
The parameter „code sequence“ defines the
counting direction of the position value. The code
increases when the shaft is rotating clockwise (CW) or counter-clockwise (CCW) (view onto the
shaft). The code sequence is defined in bit 0 of
octet 9:
Octet 9 Bit 0 Direction of rotation when viewing the shaft Code
0 Clockwise (CW) Increasing
1 Counter-clockwise (CCW) Increasing
In Class 1 this is the only parameter that can be set.
4.1.2 Class 2 functionality
Using this switch Class 2 encoders can be
restricted to the functionality of Class 1, i.e. the
scaling parameters are disabled. To use the class
2 functionalities bit 1 in octet 9 has to be set.
4.1.3 Commissioning diagnostics
This function has no significance for the encoder.
4.1.4 Scaling function
The parameter „scaling function“ enables the
scaling parameters „resolution per revolution“ and
„total resolution“. This switch should always be
activated if functions of class 2 (or even higher
classes 2.1 and 2.2) are to be used.
4.1.5 Measuring units per revolution
The parameter „measuring units per revolution“ is
used to program a desired number of steps over
one revolution. If the value exceeds the basic
(physical) resolution of the encoder, the output
code is no longer in single steps. Starting with
generation “B1” the encoder indicates a parameter error (LED) and it will not enter the data exchange
mode.
With high resolution encoders it may be necessary
to divide the value into high and low word
(depending on the software tool), refer to page 35.
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
Desired measuring units per revolution
Octet 9 Bit 1 Class 2 functionality
0 Switched off
1 Switched on
Octet 9 Bit 3 Scaling function
0 Switched off
1 Switched on
Revision 03/10 BEI Sensors Profibus Manual serie M Page 13