Siemens SIMATIC ET 200S Operating Instructions Manual page 96

1Count24V/100kHz
2.8 Position Detection
If you have assigned synchronization, the positive edge of a reference signal on the input
sets the 1Count24V/100kHz to the load value.
You can select between once-only and periodic synchronization ("Synchronization"
parameter).
The following conditions apply:
• The counting mode must have been started with the SW gate.
• The "Enable synchronization CTRL_SYN" control bit must be set.
• In once-only synchronization, the first edge loads the 1Count24V/100kHz with the load
• In periodic synchronization, the first edge and each subsequent edge load the
• After successful synchronization, the STS_SYN feedback bit is set. It must be reset by
• The signal of a bounce-free switch or the zero mark of a rotary encoder can serve as the
• The STS_DI feedback bit indicates the level of the reference signal.
In isochrone mode, the set feedback bit STS_SYN indicates that the positive edge on the
digital input was between time T
96
value after the enable bit is set.
1Count24V/100kHz with the load value after the enable bit is set.
the RES_STS control bit.
reference signal.
in the current cycle and T
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Operating Instructions, 02/2007, A5E00124867-05
in the previous cycle.
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Technological Functions