Periodic Counting - Siemens SIMATIC ET 200S Operating Instructions Manual

2.6.4

Periodic Counting

Definition
In this mode, the 1Count24V/100kHz counts periodically, depending on the main count
direction set.
• When there is no main count direction:
• When the main count direction is up:
• When the count direction is down:
Figure 2-5
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
– Counts as of 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/100kHz jumps to the load value and continues counting from there.
– Counts as of 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 upper count limit is reached, the 1Count24V/100kHz jumps to the load value
and continues counting from there.
– Counts as of the load value.
– Counts up or down.
– When the lower count limit is reached, the 1Count24V/100kHz jumps to the load value
and continues counting from there.
– The lower limit is fixed at 0, and the load value can be assigned parameters
(parameter: upper count limit) and can be changed.
Periodic Counting without a Main Count Direction
1Count24V/100kHz
2.6 Count Modes
27