BEI Sensors MHK5 Absolute Hollow Shaft Encoder - Manual (Page 16)

Data bits
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Master →
MHM5
1 0 Transfer of the required position value (= preset value)
MHM5 →
Master
0 0 New = required position value is transferred
Master →
MHM5
0 0 Reset bit 31 – normal mode
MHM5 →
Master
0 0 New = required position value is transferred
If high precision is required the preset function
should only be executed if the encoder shaft is not
moving. If the shaft moves quickly during the
preset procedure, this can result in offsets
(because of bus delay times).
Note for Singleturn devices
The procedure is similar with the singleturn-
version: Here Bit 15 is used to activate the preset
value. With high resolution singleturn encoders (16
Bit) it is not possible to set preset values > 32767
(15 bit), as the MSB is used to activate the preset.
If this functionality is needed the user has to
choose one of the manufacturer specific -encoder
versions (in these classes the singleturn position is
transmitted as 32-bit-value).
Page 16 BEI Sensors Profibus Manual serie M Revision 03/10