Danfoss VLT Series Programming Manual page 33

Servo Drive Operation
Target velocity
Velocity
acc dec
0
acc
Illustration 2.20 Usage of Acceleration and Deceleration in
Velocity Control
This principle on using the acceleration and deceleration value applies to all velocity controlled modes of operation. The
ramp bends when reversing the velocity. If this behavior is undesired, set the value of the acceleration and deceleration to
the same value.
Velocity reached function
The velocity reached function offers the possibility to define a velocity range around a velocity demand value to be
regarded as valid. If the velocity of the servo drive is within this area for a specified time (see chapter 7.11.4 Parameter:
Velocity Window (0x606D)), the velocity window time (see chapter 7.11.5 Parameter: Velocity Window Time (0x606E)), the
related control bit Target reached (bit 10) in the Statusword is set to 1.
Target reached option code (0x2054)
Velocity window time (0x606E)
Velocity window (0x606D)
Velocity actual value (0x606C)
Target velocity (0x60FF)
Velocity demand value (0x606B)
Target velocity (0x60FF)
Illustration 2.21 Velocity Reached - Functional Overview
Illustration 2.22 shows the definitions of the sub-function Velocity reached. A window is defined for the accepted velocity
range symmetrically around the velocity. If a servo drive is running within the accepted velocity range over the time velocity
window time, the bit Target reached (bit 10) in the Statusword is set to 1.
MG36D102
Programming Guide
acc dec
dec acc dec
Window
Timer
comparator
Limit
function
Comparator
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Target reached
Selector
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