Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 343)

Spindle 1 Parameters
Chapter 12
12-15
Function
This parameter specifies the direction the spindle rotates during:
any open loop spindle orient
any closed loop spindle orient that takes place before the spindle has
found a marker.
Spindle is: Encoder Marker
is:
The Orient is Performed in the
Direction:
closed loop already found that would yield the shortest path
to the orient position
closed loop not yet found as specified with this parameter
open loop N/A as specified with this parameter
If a closed loop spindle is already turning when an orient request is made,
the spindle will decelerate (or accelerate) to the AMP defined orient
spindle speed and orient to the requested location (this parameter has no
affect on the spindle direction). Closed loop spindles only use this
parameter if it has not yet seen a marker. Typically this is only after a
power up cycle before the spindle has been moved. If there is no S word
in the closed loop spindle orient block (M19), the spindle rotates to the
position defined by the Default Orient Angle parameter.
Open loop spindles always use this parameter to determine spindle
direction for an orient operation. The spindle will orient to the specified
location in open loop orient position in the direction specified with this
parameter (even if the spindle is already rotating in the opposite direction).
The direction entered here overrides the setting of the PAL flag “Spindle
Direction” ($SPNDI) during execution of an M19. $SPNDI usually checks
the spindle direction switch or button on the MTB panel to determine
spindle direction.
Refer to your programming and operation manuals for more complete
information on spindle orient.
Spindle Parameter
Number
1 [851]
12.11
Default Orient Direction