Rockwell-automation GMLC Reference Manual Manual de usuario Pagina 716

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Publication GMLC-5.2 - November 1999
Performance Considerations 679
Note: In the block, above, the AxisLink_Nodes_Addresses user
variable was declared for use by another Control Settings block
(found in the Start of Program GML Commander module,
included in the GML Commander module library). The
AxisLink_Nodes_Addresses user variable was input as the Set To
value using the Expression Builder.
For more information on user variables, see the User Variables chapter in
this manual.
Performance Considerations
Enabling AxisLink increases the CPU utilization of the motion controller
due to the communication overhead of the link. Enabling a virtual axis
again increases the CPU utilization because—in effect—it adds another
Master Only axis to the controller. Four-axis motion controllers should
use a 500 Hz servo update rate if they are also using an AxisLink virtual
axis.
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