Siemens SINAMICS PERFECT HARMONY GH180 - Page 330

At comple•on of PLC HST mode
Or PLC based Damping
Saturated Speed
Regulator
Fast Access
Speed Demand
Fast Access
Torque
Command
Slip
Iqs
Regulator
Limit Logic
IqsRef
limited
Speed
Ramp
Psuedo
Angle
Generator
Fast Access
Speed Demand
Fast Access
Torque
Command
Slip
Iqs
Regulator
Iqs
Iqs
During PLC based HST mode
Vqs
DQ
3Φ
Ids
Regulator
Vds
Iqsff IqsRef
(Speed Loop disabled)
Fast Loop
period
X
DeltaS
Ids
Regulator
DQ
3Φ
PLL
DeltaS
Flux
Regulator
Ids
FluxDS
FluxRef
IdsRef
Va,b,c ref
Va,b,c ref
Vqs
Vds
Angle
Increment
No Load
Current
Flux
Ramp
Flux
Regulator
(disabled)
Flux Ref
Speed
ref
Freq
IdsFF
IdsRef
Figure 8-32 Fast Access Command_HST_Damping
Assuming the start from zero, the sequence for start-up is as follows:
1. High Starting Torque mode (HST must be enabled), and the OLVC control mode selected. The
HST state machine remains at initialization – ‘T1’ of the HST state machine – until the drive
enters the Run state. The "Fast Access Enable" parameter (9971) must also be selected to
divert the network based speed and current inputs to the proper variables and to update
them at the desired rate.
2. The "PlcHstEnable_O" SOP 󹪞ag must be set true throughout the complete start-up for use of
the external signals and control of the HST mode state machine. This can be set true by the
SOP rather than setting it conditionally. If the 󹪞ag is not set, then the HST mode will default
to utilizing internal signals from the command generator with all state transitions controlled
internally as well.
Note
"PlcHstEnable_O" SOP Flag
Siemens recommends that this 󹪞ag be set continuously.
3. Upon starting by setting the Inverter (drive) Run Request ("InvRunRequest_O") 󹪞ag, the drive
enters the magnetizing drive state.
Advanced Operating Functions
8.23 Conveyor Applications
NXGPro+ Control Manual
328 Operating Manual, A5E50491925A