Danfoss MCO 305 Design Manual page 145

MCO 305 Design Guide
PULSACC
Summary
Syntax
Parameter
Description
Command Group
Cross Index
Example
PULSVEL
Summary
Syntax
Parameter
Description
Command Group
Cross Index
Example
__ Software Reference __
Set acceleration for the virtual master.
PULSACC a
NB!:
Changes in the acceleration in PULSACC are only valid after the next PULSVEL
command.
a = acceleration in Hz/s
With PULSACC it is possible to set the acceleration/deceleration for the virtual
master (encoder output).
The virtual master signal simulates an encoder signal. To calculate the pulse
acceleration PULSACC the parameter Encoder Resolution, the master velocity and
the ramp times must be taken into consideration.
The signals generated are evaluated simultaneously as master input so that
MAPOS, MIPOS, etc. function as they would in an external master.
PULSACC = 0 is the condition for switching off the virtual master mode, provided it
is followed by a PULSVEL command.
SYN
PULSVEL
The virtual master signal should correspond to an encoder signal of
1024 counts/revolution. The maximum speed of 25 encoder revolutions/s should
be achieved in 1 s.
pulse velocity
PULSACC
25 counts/s
25600 counts/s²
Set the velocity for the virtual master.
PULSVEL v
v = velocity in pulses per second (Hz)
With PULSVEL it is possible to set the velocity for the virtual master (encoder
output).
The virtual master signal simulates an encoder signal. To calculate the pulse
velocity the parameters Encoder resolution and master velocity must be taken into
consideration.
SYN
PULSACC
The virtual master signal should correspond to an encoder signal of
2048 counts /revolution within an encoder speed of 50 revolutions/s.
PULSVEL encoder counts
2048 50 Hz
®
MG.33.L4.02 – VLT is a registered Danfoss trademark
(PULSVEL) [Hz]
t [s]
1024 counts/rev olution
1 s
25600 Hz/s
turns
per turn
s
102400 Hz
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