Parker ac890 - Page 580

Programming D-184
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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-129.
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.