Siemens SIMATIC CM35, Manual, Page: 113 / 144

8-2
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
8.1 Function Description
In this operating mode, the CM35 supports controlled positioning with a
switch--off point.
An incremental encoder is connected to acquire the position. The encoder
pulses are acquired by the module with the correct sign in the traversing
range from –2,147,483,648 to +2,147,483,647.
Two digital outputs which are addressed by the CM35 based on direction are
available for each of the four channels.
Traversing Range Lower Limit of Traversing
Range
Upper Limit of Traversing
Range
32 bits -2,147,483,648 increments +2,147,483,647 increments
Note
When the position is no longer in the traversing range, the actual value jumps
from positive to negative or from negative to positive. You must ensure that the
traversing path is located within the traversing range limits.
To synchronize actual value acquisition, you can execute ² set actual value ²
with the user program. Move the axis to a position whose coordinate is
known. Transfer this coordinate to the module with
² set actual value. ² The
specified value is accepted as the current actual value.
Note
The conversion of the incremental value to a length value and vice versa
must be handled by the user program.
Synchronization
Positioning Operating mode