NXGpro
6.3
High Star!ng Torque Mode for Conveyor Applica!ons
Flux
Mag Current
IdsRef
Motor Speed
(from PLC)
Start Current
Iqs FF (from
PLC)
Torq Current
Limit
(from PLC)
InvRunRequest_O
From PLC
(drive enabled)
PlcHstEnable_O
Set true
From PLC
No Load current
FluxAtSetpoint_I
from drive
Run State
Magne!za!on
Complete_I
from drive
Magne!zing
State
95% Flux
Slip
speed
Motor Speed
(slip + cmd)
Rated Slip Speed
Slip Speed based on
Iqs FF
Desired star!ng torq
Delay
(Flux
Ramp
!me)
Complete
HstMode_O (PLC)
AtMinSpeed_I
(drive)
Rated Flux
Flux Reg enabledFlux Reg enabled
Speed Reg and
Ramp enabled
Current used for
Torque limit
Must maintain speed reg in
satura!on
Slip Speed based on calculated slip
compensa!on
HighStar!ngTorqueModeComplete_I
(a"er ini!alizing loops and 1 second
delay)
Run State
Droop enabled
and Slip based on Ids Ref, Flux,
Inductance, and Iqs current with slip
constant
Transi!on from HST to normal
opera!on
(same current input is used for
both – switched internally)
Two signals from PLC
– Current and Speed
Current has two
func!ons – switched
at comple!on
Same Signal
Figure 8-31 PLC Directed High Starting Torque Mode Diagram
Functionally the controls can be broken down into two segments:
1. while in the HST state machine
2. and, after completion of the state machine for continuous operation
Advanced Operating Functions
8.23 Conveyor Applications
NXGPro+ Control Manual
Operating Manual, A5E50491925A 327
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