Siemens SIMATIC ET 200S Operating Instructions Manual page 146

1Count5V
3.6 Count Modes
● Synchronize once only: If the enable bit is set and the HW enable is present, the first zero
● Synchronization periodically: If the enable bit is set and the HW enable is present, the
● After successful synchronization, the STS_SYN feedback bit is set and the SYN LED
● The signal of a bounce-free switch can serve as the reference signal.
● The STS_DI feedback bit indicates the level of the reference signal.
In isochronous mode, the set feedback bit STS_SYN indicates that the positive edge on the
digital input was between time T
146
mark loads the 1Count5V with the load value.
first and every further zero mark loads the 1Count5V with the load value.
comes on. The RES_STS control bit resets the feedback bit and switches the LED off.
in the current cycle and T
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Operating Instructions, 06/2010, A5E00124867-07
in the previous cycle.
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Technological Functions