VMX
2
Series Digital Solid State Soft Starter User Manual
41 |
P a g e
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5.6.2.a Ramp 2 (user-optional ramp)
This ramp is selected by closing the input for Ramp 2, TB1 -
terminals 5 & 6 (see section 4.2.5). If this input is left open, the
VMX2 Series
will respond only to Ramp 1 settings as listed above.
Since ramp 2 is always used as an alternate to the default Ramp 1,
different combinations of ramp profiles can be selected in
F010
.
Refer to Appendix 1 for additional information on ramp profiles.
F015 = Initial Voltage of Ramp 2
Factory Setting = 60%
Range = 0 - 100%
Sets the initial voltage of Ramp 2 when
F010 = 1 or 4
. The
initial voltage level should be set to provide just enough torque
to make the motor shaft begin to rotate while preventing torque
shock damage to mechanical components.
F016 = Initial Current of Ramp 2
Factory Setting = 200%
Range = 0 - 600%
Sets the initial current of Ramp 2 when
F010 = 2 or 3
. The
initial current level should be set to provide just enough torque
to make the motor shaft begin to rotate while preventing torque
shock damage to mechanical components.
F017 = Accel Ramp Time of Ramp 2
Factory Setting = 10 seconds
Range = 1 - 120 seconds
Sets the time between the initial value set with
F015 or F016
and either the Max Current Limit set with
F018
or full output
voltage. Also consider the
motor’s application. For example,
centrifugal pumps may require a shorter time. See notes for
F013
for more details.
F018 = Max Current Limit of Ramp 2
Factory Setting = 350%
Range = 200 - 600%
Sets the maximum motor current that the
VMX2 Series
starter
will allow during Ramp 2. (This limit applies to both voltage and
current-type ramping.) The current will be limited to this setting
until either the motor reaches full speed or the overload
protection feature trips (
F003
).
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Note
:
Ramp 2 is often useful as a “bump start” or as a temporary Across-
the-Line start mode. Consult Appendix 1 for details.
