Instruction Manual

Rockwell Automation Publication 20D-PM001C-EN-P - July 2013 197
Control Block Diagrams Appendix C
inverter_ovrload_IT.eps
Mtr Over Load (I
2
T)
60
1.0
pu_current
pu_current
2.0 typ
right of curve
1.025 typ
time (sec)
pu motor velocity
DB resistor
dc bus
415
417
416
414
321
0
5
1
Brake PulseWatts
{pulse watts @ 1sec}
Brake Watts
Exception Event 2
(BrakeOL Trip )
BusReg/Brake Ref {% of peak ac line }
Brake/Bus Cnfg
(Brake Enable)
pu Stator Current fdbk
Mtr I2T Calibrat
Mtr I2T Trp ThrH
Mtr OL Factor
Mtr I2T Curr Min
337 336 339 340
320 10
11
Exception Event 1
(Mtr OL Trip) (Mtr OL Pend )
338
Mtr I2T Spd Min
Inverter Overload IT
Heat sink and
Junction degree
Calculator
Inverter Over Load (IT)
0 1 2 3 4 5 6 7
NTC
Pwr EE Data
Iq Ref Limited
(see torque block)
313 345 343 344
346
Drive OL Status
OL OpnLP CurrLim
Heatsink Temp Drive OL JnctTemp
(NTC Open) (HS OverTemp )
OL ClsLp CurrLim
(NTC Shorted )
(IT Pending) (IT Foldback )
(HS Pending ) (IT Trip) (Jnc OverTemp)
(Inv OTmpTrip0 (Inv OL Pend) (Inv OTmpPend ) (Inv OLTrip)
320
355
(Brake Extern )
Exception Event 1
Duty Cycle
Bus Voltage
PWM Frequency
Power Device
Characteristics
13 14 16 15
308
X
2Motor NP FLA
Output Current
1 2 3 4 5 6
BA
D
C
FE HG
I
TestPoints
P347 Drive OL TP Sel P348 Drive OL TP Data
Note: Set this parameter to the minimum value for the motor overload trip to vary in time at low speeds. See Mtr I2T Spd Min on page 69
for more information.