Parker AC890PX Series, Engineering Reference

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A p p e n d i x D : P r o g r a m m i n g
D-169
AC890PX AC Drive
VIRTUAL MASTER
SETUP::PHASE CONTROL::VIRTUAL MASTER
This block transmits a regular update of speed, position and acceleration to all other drives listening on the selected channel. The output is profiled
by the ACCELERATION, DECELERATION and JERK 1-4 parameters.
Refer to REFERENCE RAMP, page D-119.
An example acceleration graph for a velocity 60 %/s maximum, acceleration of 20 %/s
2
and a jerk of 10 %/s
3
is shown below.
Parameter Descriptions
CHANNEL PREF: 118.17 Default: 0 Range: 0 to 64
This parameter sets the Firewire channel that the Virtual Master broadcasts references on.
SOURCE PREF: 118.20 Default: S RAMP Range: See below
Selects the source of the virtual master speed and position.
Enumerated Value : Source
0 : S RAMP the virtual master output is derived from the INPUT parameter via an sramp function
1 : FEEDBACK POSN the virtual master output is the motor shaft speed and position, unchanged
2 : REFERENCE ENCODR the virtual master output is the reference encoder speed and position, unchanged
3 : LINEAR RAMP the virtual master output is derived from the INPUT parameter, passed through a linear
ramp function
INPUT
PREF: 118.01 Default: 0.00 % Range: -100.00 to 100.00 %
Ramp input.
ACCELERATION PREF: 118.02 Default: 10.00 /s² Range: 0.00 to 100.00 /s²
Sets the acceleration rate in units of percent per second², i.e. if the full speed of the machine is 1.25m/s then the acceleration will be: 1.25 x
75.00% = 0.9375m/s²
DECELERATION
PREF: 118.03 Default: 10.00 /s² Range: 0.00 to 100.00 /s²
This functions in the same way as ACCELERATION above.
JERK 1 to JERK 4 PREF: 118.04, 118.05, 118.06,
118.07 Default: 10.00 /s² Range: 0.00 to 100.00 /s
3
Rate of change of acceleration for the relevant segment of the curve, i.e. JERK 1 is for segment 1, etc.