Periodic Counting - Siemens SIMATIC ET 200S Operating Instructions Manual

1Count24V
2.6 Count Modes
2.6.4

Periodic Counting

Definition
In this mode, the 1Count24V counts periodically, depending on the assigned main count
direction ("Main count direction" parameter).
● When there is no main count direction:
● When the main count direction is up:
● When the count direction is down:
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– Counts starting from the load value.
– Counts up or down.
– The count limits are fixed at the maximum count range.
– In the event of an overflow or underflow at the respective count limit, the 1Count24V
jumps to the load value and continues counting from there.
– Counts starting from the load value.
– Counts up or down.
– The upper limit can be assigned parameters, and the load value has a RESET status
of 0 and can be changed.
– When the high count limit is reached, the 1Count24V jumps to the load value and
continues counting from there.
– Counts starting from the load value.
– Counts up or down.
– When the low count limit is reached, the 1Count24V jumps to the load value and
continues counting from there.
– The low count limit is fixed at 0, and the load value can be assigned parameters
(parameter: high counting limit) and can be changed.
Figure 2-5 Periodic Counting without a Main Count Direction
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07