Siemens SIMATIC ET 200S Operating Instructions Manual page 195

Isochrone mode
In isochrone mode, the 1Count5V/500kHz accepts control bits and control values from the
control interface in each bus cycle and reports back the response in this mode in the same
cycle or in the next cycle.
In each cycle, the 1Count5V/500kHz transfers the count or latch value that was valid at time
T and the status bits valid at time T
i
A count controlled by hardware input signals can only be transferred in the same cycle if the
input signal occurred before time T
See also
Assigning Parameters for Position Feedback (Page 211)
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
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i
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i
1Count5V/500kHz
3.8 Position feedback
195