Installation manual

11
Operational Overview
Figure 11: Velocity vs. Time Diagram using Preset Velocities
Analog + Preset Summation Sub-Mode
In Analog + Preset Summation sub-mode the Velocity Command is the result of the sum of the Velocity Command
Analog and the Velocity Command Preset values:
Where:
VC = Velocity Command
AC = Velocity Command Analog
PC = Velocity Command Preset
Example 1:
Use of Velocity Presets in a phase advance/retard application. Velocity Preset 0 is set to 0 RPM, Velocity Preset 1 is set
to +5 RPM, and Velocity Preset 2 is set to -5 RPM. The Analog Input is the command source for a web application where
a phase adjustment may be useful. Without interrupting the operation, you may select either Velocity Preset 1 or 2 to
speed up or slow down the motor thereby advancing or retarding the phase between the motor and the web material.
Example 2:
Use the Velocity Command Analog as a trim adjustment to the digital Velocity Presets. Velocity Preset 2 is selected with
Analog Input at 0, so the Velocity Command Preset and Velocity Command are equal (set to match a conveyor speed).
You can use the Analog Input (Velocity Command Analog) as a fine adjust for the Velocity Command to exactly match
the conveyor speed.
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0
-200
-400
-600
-800
-1000
-1200
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-2200
VELOCITY
(+)
A/D 1
Preset
Velocity 0
Preset
Velocity 1
Preset
Velocity 2
Preset
Velocity 3
Preset
Velocity 0
A/D 2
A/D 2
A/D 3
A/D 0
A/D = Acceleration/Deceleration Ramp
TIME
PC AC VC +=