Siemens SINAMICS S120 Function Manual page 1003
Drive functions
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Resumption of DRIVE-CLiQ communication when autonomous mode is active
A distinction must be made between the following two operating states:
● The DRIVE-CLiQ bus timing, e.g. clock cycle settings, has not changed since the
component last booted:
The DRIVE-CLiQ component boots in cyclic mode.
● The DRIVE-CLiQ timing has changed:
Autonomous operation must continue at all costs. The DRIVE-CLiQ component refuses
to boot until the application signals that autonomous operation is no longer required. The
component can then restart with the modified clock cycle settings.
For a 2nd download it is possible that the component is already operational. In order that a
2nd download (reparameterization, factory setting, ...) is possible, the DRIVE-CLiQ master
must "deactivate" the protective function (if one is selected) and thus also autonomous time-
slice operation. All timing changes can be accepted in this state.
The DRIVE-CLiQ master performs a relevance check on the download (only those settings
which affect the time-slice behavior of the component are relevant here).
Reconfigurations, which must be linked to the DRIVE-CLiQ slave with a message "Timing
change" are:
● Changes to the DRIVE-CLiQ clock cycle for the component.
● Changes to oversampling settings which require internal reconfiguration of the time-slice
system.
Please also note the following:
● Changes to component connections and longer cables between components require
adjustments to signal propagation delays and therefore also change the timing.
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Basic information about the drive system
13.11 DRIVE-CLiQ
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