
Rockwell Automation Publication 750-PM001J-EN-P - October 2014 437
PowerFlex 755 Control Block Diagrams Appendix A
Figure 71 - Inverter Overload IT
1
2
3
4
5
6
BA
D
C
FE HG
I
Inverter Overload IT
DB resistor
dc bus
Bus Reg Mode A
Bus Reg Mode B
372
373
Bus Reg Lvl Cnfg 374
Bus Reg Level
375
Bus Reg Ki
380
Bus Reg Kp
381
Bus Limit Kp 376
Bus Limit Kd
377
Bus Limit ACR Ki
378
Bus Limit ACR Kp
379
DB Resistor Type 382
DB Ext Ohms
383
DB Ext Watts
384
DB ExtPulseWatts
385
* Note: Parameters are
not functional when any
of the FV motor control
modes are selected
12
DC Bus Memory
Heatsink and
Junction Degree
Calculator
Inverter Overload (IT)
NTC
Pwr EE Data
Output Current
7
Duty Cycle / Rating
DC Bus Voltage
PWM Frequency
Power Device
Characteristics
38
11
Drive OL Mode
420
Current Limit Sel
421
422
423
Other Ref Sources
Current Limit 1
Current Limit 2
940 Drive OL Count
941 IGBT Temp Pct
942
IGBT Temp C
943 Drive Temp Pct
944 Drive Temp C
424 Active Cur Lmt
Alarm Status B
IGBT OT
960 0
1
4
5
6
Heatsink OT
Drive OL
CurLmt Reduc
PWMFrq Reduc
Fault Status B
Drive OL
953
2
3
4
5
6
Heatsink OT
Transistor OT
SinkUnderTmp
Excess Load
Mtr Over Load (I
2
T)
60 (Hot)
Motor
Current
Motor
Current
right of curve
1.0 - 2.0
(1.025 Typ)
time (sec)
Motor
Speed (Hz)
414
Mtr OL Hertz
X
26
Motor NP Amps
180 (Cold)
102%
150%
413
Motor OL Factor
416 MtrOL Reset Time
50%
Mtr OL Actv 410
Mtr OL at Pwr Up
411
Mtr OL Alarm Lvl
412
Mtr OL Reset Lvl
415
418 Mtr OL Counts
419
Motor OL Trip Time
Alarm Status A
Motor OL
959
2
Fault Status A
952 2
Motor OL
*
Parameter
Selection
[24a G5]
d14 Active PWM Freq
‘d’ Prefix Refers to Diagnostic Item Number (ex. d33) – Reference Symbol Legend
PF755 Rev_10.a
Page 36
[24b G5]
306
Voltage Class
305
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