Siemens SINAMICS PERFECT HARMONY GH180 - Protocol for Cell Communication

3.4 Protocol for Cell Communication
SINAMICS Perfect Harmony™ GH180 power cells incorporate a dedicated, simple protocol used
to communicate with the cells. While the drive is running, information sent to each cell consists
of:
• run enable
• gating information
• a synchronizing bit for the temperature feedback engine.
Information sent from the cells consists of:
• the cell temperature
• the fault status
• a cell low voltage level warning.
Fault information follows a "wire-OR'd" design in that all cells can be shut down within
microseconds of a fault detection on any single cell. After a fault detection, diagnostic routines
run to identify the exact fault and cell location.
NOTICE
This feature is available as of software version 8.1.0
Advanced Protocol (AP)
For certain GH180 power cells, an advanced protocol (AP) is available which provides additional
information to and from the power cells. AP maintains backward compatibility with older cell
types.
AP requires speci󹪝c cell control boards (CCBs) capable of communication using AP to be installed
into a power cell. Not all power cells are capable of utilizing AP type CCBs.
The control detects the presence of AP capable CCBs on an individual cell basis, and can
dynamically fall back to original protocol for an older cell type. Although this capability is
available in the control, it may not be feasible within the power electronics to mix cell types,
unless running at the least common denominator of cell capability.
AP provides additional feedback from cells equipped with this protocol capability for the control
while the drive is running. AP maintains the fast legacy signals needed for control and fault
handling.
Enhanced Protocol (EP)
IQ enabled power cells and sensors support EP protocol. EP enabled devices support enhanced
data rates, 󹪞exibility of con󹪝guration, and twice the base data set as AP cells. This protocol
supports SINAMICS Perfect Harmony GH180 IQ functionality where enhanced data rates
supports enhanced analysis and diagnostic capabilities.
Control Description
3.4 Protocol for Cell Communication
NXGPro+ Control Manual
36 Operating Manual, A5E50491925A