Aerotech UNIDEX 600 Series, User Manual

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Parameters U600 User’s Guide
C-84
Aerotech, Inc.
Version 1.4
C.4.71. LinearFeedRateActual
This task parameter indicates the actual vectorial feedrate of linear axes, in user units per
second. This is the same as the commanded vectorial feedrate, (task parameter
RotaryFeedRateActual) unless the speeds of the axes involved are limited by the
MaxFeedRateIPM and MaxFeedRateRPM machine parameters, or the MFO is set to less
than 1, in these cases it is less. Note, that the units of this parameter will be changed by
the UserFeedRateMode task parameter. Also, this parameter only denotes the vectorial
speed during contoured (G1, G2, G3, etc.) moves, and is zero during all other types of
motion. This parameter is updated every 10 millisecond’s.
C.4.72. LineNumberUser
This task parameter indicates the current CNC program line number.
C.4.73. LineNumber960
This task parameter indicates the current CNC program line number on the controller.
This most likely will be different than the LineNumberUser task parameter due to the fact
that one user CNC program line occupies multiple lines on the controller. This parameter
is for internal use only.
C.4.74. MaxCallStack
This task parameter specifies the maximum number of call stack elements available for
this task. Every subroutine or program call pushes one element onto the call stack. Every
return pops one element off the call stack. Each call stack has its own set of call stack
parameters.
This parameter should only be set from the Setup page of the UNIDEX 600 MMI or
from a C library function call, never from within a CNC program.
C.4.75. MaxLookAheadMoves
This task parameter defines the number of CNC program blocks which the CNC Block
Look-Ahead process, will use to plan the (acceleration/deceleration) motion profile for
contoured motion. The maximum value of this parameter is limited by the value at which
motion queue starvation occurs.
It specifically serves two different purposes, depending on whether Multi-Block
LookAhead (G301) mode is active.
If Multi block Look-Ahead mode is disabled, the controller only looks one CNC program
contoured motion statement ahead in the program. However, it will look through a
number of non-contoured motion statements in order to find that motion statement. This
parameter is the maximum number of non-contoured motion statements it will look ahead,
in order to find the “next” contoured motion statement. If the specified number of non-
contoured motion statements is reached before finding a contoured-motion statement, the
controller declares that there is no next motion statement.
WARNING