Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 226

Operating the Control
7.12 Process Tolerant Protection Strategy (U10)
3. Trip alarm
A trip alarm clearly indicates that a VFD high parameter limit has been reached and that a VFD
trip is pending. The operator receives a message that unless the alarm can be cleared by a
process change the VFD will trip.
4. Trip
Certain VFD faults cannot be provided with advance warning. This limited number of faults
will result in a VFD trip. A trip message is also annunciated when a trip alarm time limit has
been exceeded. The number of mandated trips is considerably reduced with the
implementation of cell bypass.
With ProToPS™ the VFD Run signal is maintained as "true" and the VFD Trip signal is maintained
as "false" for all alarm states.
ProToPS™ Implementation
ProToPS™ provides the five main protection indication categories as separate digital output
signals. The concept is to provide the operator, or the process program, with a clear message
indicating a status change in the VFD. The WAGO I/O system provides these five digital outputs.
The location of the outputs is maintained as a standard set of TB2 terminations.
ProToPS™ indicates the specific information on the VFD parameter change, along with the
general category information, as a serial address across a serial communications interface.
ProToPS™ supports any serial communications protocol supported by the VFD product.
If other specific digital output information is required for a specific customer project, that
information must be mapped to a new digital output point on an additional digital output
module. The five basic category outputs must be present as digital outputs, at the standard
designated TB2 terminal point locations, to validate the ProToPS™ implementation.
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NXGPro+ Control Manual
Operating Manual, A5E50491925A