Siemens Sinamics S120 Function Manual page 134

Servo control
3.19 Central probe evaluation
3. The cyclic measurement is activated with a 0/1 transition of the control bit for the signal
4. After activating the measurement, the measured value buffer is emptied once for
5. When the buffer is full, the oldest measured value is overwritten first (first in/first out). The
6. The measured value buffer is then cyclically emptied and the measured values are
7. If several probes of being used, then the time stamps of the measurements are entered
8. Up to 16 time stamps (MT_ZS), can be entered into telegram 395.
9. As soon as there is no longer any space for the time stamps of a probe in telegram 395,
10. From a selected probe, all signal edges are always taken into account. Individual signal
11. The time stamps are transferred in parallel (to acquire new probe events associated with
12. The cyclic measurement is deactivated with a 1/0 transition of the control bit for a falling
13. Transfer with PROFIdrive telegram 395.
The PZDs of the probe time stamp are BiCo parameters, which are automatically connected
with the indices of the new parameter r0565[16] when the telegram block is selected.
After the measuring function has been activated, for several measured values per DP cycle,
the acquired time stamps are saved in the indices of r0565[0...15] for transfer, corresponding
to their sequence in time starting with the oldest measured value.
Probe time stamp references
For telegram 395, the probe time stamps MT_ZS_1...16 are assigned to the telegram
locations using the probe time stamp references MT_ZSB1...4.
Four probe time stamps each (MT_ZS) are assigned a probe time stamp reference
(MT_ZSB):
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edges in the probe control word.
initialization.
bit "measured value buffer full" in the probe-diagnostic word signals the risk of losing
measured values.
converted in the sense of a measuring task into a time stamp. The time stamps are saved
according to their chronological order, starting with the oldest, in the indexes of parameter
r0565[0...15] for the transfer.
into the telegram block, corresponding to their chronological sequence, from the lowest
up to the highest probe.
then the "Telegram full" is set in MT_DIAG.
Example:
– From the 1st probe, 4 values are transferred
– From the 2nd probe, 6 values are transferred
– From the 3rd probe only the first 6 measured values are transferred, the rest is cut off
and "Full telegram" is signaled in MT_DIAG.
edges cannot be selected or deselected.
a time stamp without handshake). A time stamp is only transferred for one DP cycle.
Then the time stamp overwritten with zero or a new time stamp.
or rising signal edge in the probe control word.
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions