Siemens SINAMICS S120 Function Manual page 908

Basic information about the drive system
12.11 Emergency operating mode for DRIVE-CLiQ components
Communication restart includes a topology detection during emergency operation.
Note
When the component is running in emergency mode, it cannot be deactivated.
Preparation for autonomous time-slice operation
The application signals (basic system DRIVE-CLiQ slave components) preparation for
autonomous time-slice operation. This occurs, for example, when the "armature short-circuit"
protective function is active or in chopper operation.
Changeover from normal to autonomous operation
The application activates autonomous time-slice operation. Changeover takes place
instantaneously.
Changeover from autonomous to normal operation
It is always possible to change over into normal operation without a POWER ON.
Resumption of DRIVE-CLiQ communication when autonomous mode is active
A distinction must be made between the two operating states below:
● The DRIVE-CLiQ bus timing, e.g. clock cycle settings, has not changed since the
● The DRIVE-CLiQ timing has changed:
The component may already be running when the second download takes place. To permit a
second download (reparameterization, factory setting, ...), 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).
906
component last booted:
The DRIVE-CLiQ component boots in cyclic mode.
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.
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions