Siemens SIMATIC ET 200S Operating Instructions Manual page 25

• When the count direction is down:
The internal gate is automatically closed in the event of an overflow/underflow at the
counting limits. To restart counting, you have to open the gate again.
Figure 2-3
With an interrupting gate function, the 1Count24V/100kHz remains at the underflow when
the gate is started.
Figure 2-4
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
– Counts starting from the load value.
– Counts up or down.
– When the low counting limit is reached, the 1Count24V/100kHz jumps to the load
value and the gate is closed.
– The low counting limit is fixed at 0, and the load value can be assigned (parameter:
high counting limit) and can be changed.
Count Once Without Main Count Direction; Canceling Gate Function
Count Once with Up as the Main Count Direction
1Count24V/100kHz
2.6 Count Modes
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