Technical information

5 – PARAMETER DESCRIPTIONS
65
P35 Independent Starting/Running Overload PFN 12
LCD Display
PFN:Indep S/R OL
12 Off
Range OFF – On (Default OFF)
Description If “OFF”
When this parameter is “OFF” the overload defined by the Motor Running Overload Class parameter
is active in all states.
If “ON”
When this parameter is “ON”, the starting and running overloads are separate with each having their
own settings. The starting overload class is used during motor acceleration and acceleration kick.
The running overload class is used during all other modes of operation.
If both the running overload and the starting overload classes are set to OFF, then the existing
accumulated motor OL% is erased and no motor overload is calculated in any state.
If the starting overload class is set to OFF and the running overload class is set to On, then the I
2
t
motor overload does NOT accumulate during acceleration kick and acceleration ramping states.
However, the existing accumulated OL% remains during starting and the exponential heating and
cooling function during all other states. However, the OL% is capped at 99% during starting.
Although there is really no reason to do so, the starting overload class could be set to ON and the
running overload class set to OFF.
See Also Motor Running Overload Class parameter on page 42
Motor Starting Overload Class parameter on page 66
Motor Overload Hot/Cold Ratio parameter on page 67
Motor Overload Cooling Time parameter on page 68
Theory of Operation section 8.1.7, Separate Starting and Running Motor Overload Settings, on page
114