Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 330

Advanced Operating Functions
8.23 Conveyor Applications
Fast Access
Torque
Command
Fast Access
Speed Demand
Fast Access
Torque
Command
Fast Access Speed
Speed Demand Ramp
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 flag 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 flag 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 flag be set continuously.
3. Upon starting by setting the Inverter (drive) Run Request ("InvRunRequest_O") flag, the drive
enters the magnetizing drive state.
328
During PLC based HST mode
Iqsff IqsRef
(Speed Loop disabled)
Slip
Flux Ref
Flux
No Load
Ramp
Current
Speed
Freq
ref
X
Fast Loop
period
At comple•on of PLC HST mode
Or PLC based Damping
Saturated Speed
Regulator
Slip
FluxRef
FluxDS
Iqs
Flux
IdsFF IdsRef
Regulator
(disabled)
Angle
Increment
IqsRef
limited
Limit Logic
Iqs
IdsRef
Flux
Regulator
Ids
DQ
Vqs
Iqs
Regulator
Vds
Ids 3Φ
Regulator
Psuedo
DeltaS
Angle
Generator
Vqs
Iqs
DQ
Regulator
3Φ
Vds
Ids
Regulator
DeltaS
PLL
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Va,b,c ref
Va,b,c ref