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2 Basic principles of the counter module
Counter Module SIMATIC FM 350-2
V1.0, Item ID: 83146298
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2.5.2
Continuous counting
In this mode, the FM 350-2 counter module counts continuously starting at the
current counter reading. The default start value is 0. The start value can be
changed by loading a value.
If the counter reaches the high count limit when counting up and another count
pulse is received, it jumps to the low count limit and continues to count from
there without any pulse losses.
If the counter reaches the low count limit and another count pulse is received,
it jumps to the high count limit and continues to count from there without any
pulse losses.
Figure 2–5: Time diagram for continuous counting, up and down
Note
The configuration instructions for continuous counting can be found in
chapter 3.6.1, and the instructions for loading values are in chapter 3.6.7.