Siemens S7-300 - Page 87

Machine and cam data
9.10 Machine data of the encoder
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
87
Distance per encoder revolution
Address Name Type Initial value Comment
24.0 DISP_REV DINT L#80000 Distance per encoder revolution
1 µm to 1 000 000 000 µm
With the "Distance per encoder revolution" machine data, you inform the FM 352 about the distance
covered by the drive system per encoder revolution.
The "Distance per encoder revolution" value depends on the structure of the axis and the way in
which the encoder is mounted. You must take all transmission elements, such as couplings or gears
into account.
The chapter "Resolution (Page 91)" describes the connection betwe
en the machine dat
a "Distance
per encoder revolution" and "Increments per encoder revolution".
0RWRU
*HDU
(QFRGHU
0RWRU
(QFRGHU
*HDU
Increments per encoder revolution
Address Name Type Initial value Comment
32.0 INC_REV DINT L#500 Increments per encoder revolution
Range of values:
1 to 2
25
Note:
This entry is irrelevant when using pulse units.
The "Increments per encoder revolution" machine data element specifies the number of increments
output by an encoder per revolution. FM 352 calculates he resolution based on this value and the
"Distance per encoder revolution" machine data element.
 Incremental encoder
Any value within the range of values can be input. The module evaluates the increments in four
operations (see chapter "Incremental encoders (Page 137)").
 Initiator
Any valu
e within the range of values.
 Absolute encoder
Limits differ between the various encoder types: