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Installation manual
CNC 8055
CNC 8055i
13.
ACCESS TO INTERNAL CNC VARIABLES
SOFT: V02.2X
Variables associated with coordinates
DPOS(X-C)
The CNC updates this variable whenever probing operations G75, G76 and probing cycles PROBE
and DIGIT are carried out.
When the digital probe communicates with the CNC via infrared beams, there could be some delay
(milliseconds) from the time the probe touches the part to the instant the CNC receives the probe
signal.
Although the probe keeps moving until the CNC receives the probing signal, the CNC takes into
account the value assigned to general machine parameter PRODEL and provides the following
information in the variables TPOS(X-C) and DPOS(X-C).
TPOS(X-C) Actual position of the probe when the CNC receives the probe signal.
DPOS(X-C) Theoretical position of the probe when the probe touched the part.
FLWE(X-C)
It returns the following error of the selected axis.
DEFLEX DEFLEY DEFLEZ
These variables can only be used at the mill model. They return the amount of deflection obtained
at the time by the Renishaw probe SP2 on each axis X, Y, Z.
DPLY(X-C)
It returns the position value (coordinate) shown on the screen for the selected axis.
DRPO(X-C)
It returns the position indicated by the Sercos drive of the selected axis (variable PV51 or PV53 of
the drive).
Read-and-write variables
DIST(X-C)
These variables may be used to read or modify the distance traveled by the selected axis. This value
is accumulative and is very useful when it is required to perform an operation which depends on
the distance traveled by the axes, their lubrication for example.
Accessing any of the DIST(X-C) variables interrupts block preparation and the CNC waits for that
command to be executed before resuming block preparation.
LIMPL(X-C) LIMMI(X-C)
With these variables, it is possible to set a second travel limit for each axis: LIMPL for the upper limit
and LIMMI for the lower one.
The PLC activates and deactivates these second limits through general logic input ACTLIM2
(M5052).
The second travel limit will be taken into account if the first one has been set using axis machine
parameters LIMIT+ (P5) and LIMIT- (P6).
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