ifm electronic RN3001 - Manual (Page 22)

Encoder with Profibus interface
22
Positive and negative direction of rotation and if the zero point is possible
exceeded is considered automatically� The measuring distance covered must not
be longer than half the measuring range of the encoder (i�e� max� 2047 revolutions
for the multiturn encoder with 4096 revolutions, max� 8191 revolutions for the 14-
bit multiturn)�
As response to the "stop teach operation" command the encoder transmits the
total resolution calculated by the device�
► Write down the value and accept it later for the normal operation of the system
in projection / parameter setting�
After this process the device works with the new scaling factor which is stored in
the EEPROM non-volatilely�
Status bits Data bits
Bit 31 30 29 28 27 26 25 24���0
Master
→ encoder
0 0 1 0 0 0 0 Number of the requested steps over the
measuring range covered
Encoder
→ master
0 1 1 X X 0 1 Transfer of the total resolution for the new
gearbox factor
Master
→ encoder
0 0 0 0 0 0 0 Reset bit 29
Encoder
→ master
0 1 0 X X 0 1 Output actual value (included in the new
gearbox factor)
Encoder replacement without a new teach operation
► Transfer the total resolution determined by the encoder to the projection�
Enter the total resolution determined during the teach operation into the parameter
field [Desired measuring units] (→ 10.1.2) and then set the switch to [Max. total
measuring range] → 10.1.3).
During the new configuration make sure that the direction of rotation is entered
correctly - the setting in the set-up mode must also be observed during parameter
setting� Then the set-up mode can be disabled via parameter setting; the encoder
is now used in "normal operation"�