Function Description - Siemens SIMATIC CM35 Manual

Pulse Counter Operating Mode
5.1

Function Description

5-2
In this operating mode, the CM35 counts continuously up or down within the
counting range 0 to 65535, when the counter is enabled.
- - When the counting value reaches the upper counting limit when
counting up, and an additional counting pulse occurs, the counting
value jumps to the lower counting limit and continues to count from
there without losing an impulse.
- - When the counting value reaches the lower counting limit when
counting down, and an additional counting pulse occurs, the counting
value jumps to the upper counting limit and continues to count from
there without losing an impulse.
Table 5-1 Counting range
Counting Range Lower Counting
16 bits
Counter status
Upper counting
limit
Lower counting
limit
Figure 5-1 Counting up with counter started
Upper Counting
Limit Limit
0 65535
(4) J31069-D0416-U001-A5-7618
Counting
Frequency
Max. of 10 kHz
CM35 Counter Module