Siemens SIMATIC ET 200S Operating Instructions Manual page 87

Isochrone mode
In isochrone mode the 1Count24V/100kHz 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 1Count24V/100kHz transfers the count and latch value that were valid at
time T
A count controlled by hardware input signals can only be transferred in the same cycle if the
input signal occurred before time T
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
and the status bits valid at time T
i
.
i
.
i
1Count24V/100kHz
2.8 Position Detection
87