Rockwell Automation 21G PowerFlex 750-Series AC Drives Programming Manual User Manual
Page 99
Rockwell Automation Publication 750-PM001J-EN-P - October 2014
99
Drive Port 0 Parameters
Chapter 3
PR
OTEC
TI
ON
M
otor O
ve
rl
oad
418
Mtr OL Counts
Motor Overload Counts
Accumulated percentage of motor overload. Continuously operating the motor over
100% of the motor overload setting will increase this value to 100% and cause the
action selected in P410 [Motor OL Actn] to be taken.
Units:
Default:
Min/Max:
%
0.00
0.00 / 100.00
RO
Real
419
Mtr OL Trip Time
Motor Overload Trip Time
Displays the inverse of the motor overload time, equal to the number of seconds before
P418 [Mtr OL Counts] reaches 100%, and the motor overload action is taken.
Units:
Default:
Min/Max:
Secs
99999
0 / 99999
RO
32-bit
Integer
Fi
le
Grou
p
No.
Display Name
Full Name
Description
Values
Re
ad
-W
ri
te
Da
ta
T
ype
Fil
e
Gr
ou
p
No.
Display Name
Full Name
Description
Values
Re
ad
-Write
Da
ta
T
yp
e
PR
O
TEC
TION
Lo
ad Limits
420
Drive OL Mode
Drive Overload Mode
Selects the action to take when the drive detects that it is being overloaded. Reducing
current limit and / or PWM frequency may allow the drive to continue running without
faulting. When using a sine wave output filter, set this parameter to 1 “Reduce CLmt” or
0 “Disabled.”
Default:
Options:
3 = “Both PWM 1st”
0 = “Disabled”
1 = “Reduce CLmt”
2 = “Reduce PWM”
3 = “Both PWM 1st”
RW 32-bit
Integer
421
Current Lmt Sel
Current Limit Select
Selects the source for the current limit value. When the load is large enough to cause
current that equals or exceeds this value, the output frequency will automatically adjust
(increase or decrease, as required) to attempt limiting the output current to this value.
Default:
Options:
422
1 / 159999
RW 32-bit
Integer
422
423
Current Limit 1
Current Limit 2
Current Limit n
Constant values that can be used as sources for P421 [Current Lmt Sel].
The value of these parameters should be checked if changes have been made to P305
[Voltage Class] and/or P306 [Duty Rating].
Units:
Default:
Min/Max:
Amps
Based on Drive Rating
Based on Drive Rating
RW Real
424
Active Cur Lmt
Active Current Limit
Displays the current that is actively being used, including the automatic foldback effect
from the drive overload function (see P420 [Drive OL Mode]).
Units:
Default:
Min/Max:
Amps
0.00
–/+P26 [Motor NP Amps] x 8
RO
Real
425
Current Rate Lmt
Current Rate Limit
Sets the largest allowable rate of change for the torque producing current reference (Iq).
This number is scaled in percent of rated motor current for every 250 microseconds.
Units:
Default:
Min/Max:
%
400.00
1.00 / 800.00
RW Real
426
Regen Power Lmt
Regenerative Power Limit
Sets the limit for power flow from the motor to the drive (regenerating). Only active in
Flux Vector (FV) control modes.
Units:
Default:
Min/Max:
%
–50.00
–800.00 / 0.00
RW Real
427
Motor Power Lmt
Motor Power Limit
Sets the limit for power flow from the drive to the motor (motoring). Only active in Flux
Vector (FV) control modes.
Units:
Default:
Min/Max:
%
200.00
0.00 / 800.00
RW Real
428
Current Limit Kd
Current Limit Derivative Gain
Derivative gain for the current limit function. This parameter is not functional when any
of the FV motor control modes are selected.
Units:
Default:
Min/Max:
Secs
760.0
0.0 / 1000000.0
RW Real
429
Current Limit Ki
Current Limit Integral Gain
Integral gain for the current limit function. This parameter is not functional when any of
the FV motor control modes are selected.
Default:
Min/Max:
680.0
0.0 / 10000.0
RW Real