Siemens SINAMICS PERFECT HARMONY GH180 - Page 226

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 󹪝ve 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 󹪝ve digital outputs.
The location of the outputs is maintained as a standard set of TB2 terminations.
ProToPS™ indicates the speci󹪝c 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 speci󹪝c digital output information is required for a speci󹪝c customer project, that
information must be mapped to a new digital output point on an additional digital output
module. The 󹪝ve basic category outputs must be present as digital outputs, at the standard
designated TB2 terminal point locations, to validate the ProToPS™ implementation.
Operating the Control
7.12 Process Tolerant Protection Strategy (U10)
NXGPro+ Control Manual
224 Operating Manual, A5E50491925A