Siemens SINAMICS S120 Commissioning Manual page 139

Operating state of power units connected in parallel
Fault messages and alarms from A05000 or F05000 onwards indicate faults in a power unit.
Power unit faults are stored in the fault buffer in the appropriate Control Unit and can be read
as a fault value using parameter r0949 (interpreted decimally). This fault value corresponds
to the drive object number in the drive line-up topology. The number of the fault occurring is
stored in parameter r0945.
The power unit's operating state (infeed or Motor Module) is displayed at both front LEDs on
the corresponding Control Interface Module (CIM).
The power unit for a specific drive can be identified using parameter p0124. During
p0124[0...n] = 1, the LED READY on the power unit concerned flashes green/orange or
red/orange at 2 Hz. For parallel connections the parameter index is assigned to one power
unit in each case.
Configuration of power units connected in parallel
Information on the hardware configuration and wiring the power units is provided in the
SINAMICS S120 Manual Chassis Power Units.
You can find information on configuration in "SINAMICS Configuration Manual G130, G150,
S120 Chassis, S120 Cabinet Modules, S150". The installation of power units within a control
cabinet with Line Connection Modules is also described in this manual.
Commissioning Manual
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
2.9 Commissioning of power units connected in parallel
Commissioning
137