Application Specific Features
7.10 Process Availability - The Perfect Harmony Advantage
Product User Manual
172 Operating Instructions, Version AE 12/2009, A5E01454341C
7.10.3 ProToPSTM Implementation
With ProToPS™, the four indication categories are provided as separate digital output
signals (Alarm, Process Alarm, Trip Alarm, Trip). The concept is to provide the operator, or
the process program, with a clear message to indicate a status change in the VFD. The
specific information on the VFD parameter change is indicated (along with the general
category information) across a serial communications interface. Any serial communications
protocol supported by the VFD product can be supported in the ProToPS™ implementation.
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 four defined outputs must be present as digital outputs to validate the
ProToPS™ implementation.
7.10.4 The ProToPSTM Advantage
With cell bypass, there are virtually no cell faults that are non-bypassable. With NXG control,
the need for the designation "Transient Alarm" has disappeared as all bypassable faults
become process transparent.With ProToPS
TM
and the NXG control, combined with the
unique benefits of the Perfect Harmony cell based distributed power technology, process
availability can be considerably enhanced and the process operator can truly control the
process.
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