Danfoss FC 300 Design Manual page 185

FC 300 Design Guide
greater the jerk compensation achieved, and thus
the lower the torque jerks in the application.
3-8* Other Ramps
"
Configure parameters for special ramps,
e.g., jog or quick stop.
3-80 Jog Ramp Time
Range:
0.01 - 3600.00 s
Function:
Enter the jog ramp time, i.e. the acceleration/de-
celeration time between 0 RPM and the rated motor
frequency n (set in par. 1-25 Motor Nominal
M,N
Speed). Ensure that the resultant output current
required for the given jog ramp time does not
exceed the current limit in par. 4-18. The jog
ramp time starts upon activation of a jog signal
via the control panel, a selected digital input,
or the serial communication port.
3-81 Quick Stop Ramp Time
Range:
0.01 - 3600.00 s
Function:
Enter the quick stop ramp-down time, i.e., the
deceleration time from the rated motor speed to 0
RPM. Ensure that no resultant overvoltage will arise
in the inverter due to regenerative operation of the
motor required to achieve the given ramp-down
* default setting ( )
How to Program
*
display text [ ] value for use in communication via serial communication port
MG.33.B6.22 - VLT is a registered Danfoss trademark
time. Ensure also that the generated current
required to achieve the given ramp-down time does
not exceed the current limit (set in par. 4-18). Quick
stop is activated by means of a signal on a selected
digital input, or via the serial communication port.
*
s
3-9* Digital Pot.Meter
"
The digital potentiometer function allows the user
to increase or decrease the actual reference by
adjusting the set-up of the digital inputs using
the functions INCREASE, DECREASE or CLEAR. To
activate the function, at least one digital input must
be set up to INCREASE or DECREASE.
3-90 Step Size
Range:
0.01 - 200.00%
Function:
Enter the increment size required for
INCREASE/DECREASE, as a percentage of
the nominal speed set in par. 1-25. If
INCREASE / DECREASE is activated the resulting
reference will be increased / decreased by the
amount set in this parameter.
3 s
3-91 Ramp Time
Range:
0.001 - 3600.00 s
Function:
Enter the ramp time, i.e., the time for adjustment
of the reference from 0% to 100% of the specified
*
0.10%
*
1.00 s
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