Assignment Of The Feedback And Control Interface For Position Feedback - Siemens SIMATIC ET 200S Operating Instructions Manual

1Count5V/500kHz
3.8 Position feedback
If you have assigned synchronization, the positive edge of a reference signal on the input
sets the 1Count5V/500kHz 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 the1Count5V/500kHz 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
3.8.6

Assignment of the Feedback and Control Interface for Position Feedback

Note
The following data of the control and feedback interfaces are consistent for the
1Count5V/500kHz:
Bytes 0 to 3
Bytes 4 to 7
Bytes 8 to 11 (modified user data interface)
Use the access or addressing mode for data consistency over the entire control and
feedback interface on your master (only for configuration using the GSD file).
204
value after the enable bit is set.
1Count5V/500kHz 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