GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 158)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
30
Fwd-Rev Changes the sign of the Ramp reference. When Fwd direction is selected the Ramp
reference is multiplied by +1. When Rev direction is selected the Ramp reference is
multiplied by-1.
Forward sign Set the Fwd direction of the Ramp reference. It can be programmed on a digital input.
Reverse sign Set the Rev direction of the Ramp reference. It can be programmed on a digital input.
When both Fwd and Rev sign are 0 or 1, or Fwd-Rev is 0 or 1, the multiplexer is 0.
The behavior of the ramp circuit is defined by the Enable Ramp, Ramp In = 0, Ramp Out = 0 and Freeze
ramp parameters.
Enable Ramp
This parameter can be changed only with a disabled drive.
Enabled The ramp is enabled.
Disabled The ramp is disabled.
Ramp out = 0 Not active (H) Enabled ramp output.
Active (L) The ramp ouput is immediately set to zero.
Ramp in = 0 Not active (H) Enabled ramp input. The Ramp Ref parameter corresponds to the
setreference.
Active (L) Disabled ramp input. Ramp Ref = 0
Ramp
out = 0
Ramp
ref
Ramp
in = 0
Ramp
output
Figure 6.6.2.3: Ramp control
Freeze ramp Not active (H) The value at the ramp ouput is kept, irrespective of any possible refer-
ence value changes at the ramp input.
Active (L) The ramp output follows the reference value changes at the ramp input
according to the times set.
Ramp + Active if the drive uses a positive torque (clockwise rotation and counter-clockwise braking).
Ramp - Active if the drive uses a negative torque (counter-clockwise rotation and clockwise
braking). Only for 6KDV3 ... Q4...
Drive operation is only possible with the ramp functionenabled. Enable ramp=Enabled.
When the ramp input is enable via Ramp in = 0, the acceleration time of the drive starts. If the input is disabled,
the drive slows down according to the decelertion time set until zero speed is reached.
When the ramp output is set to zero via Ramp out = 0, the drive brakes through the maximum available torque.
With the 6KDV3 ... Q2 converters no braking is possible. The function (also Quick Stop) causes the motor to coast.