Rockwell Automation 1746-HSTP1 Stepper Controller Module/ User Manual - Manual (Page 34)

Publication 999-121 - December 1999
Module Operation 4-3
programmed velocity data. Use the Jog
+ or Jog– to initiate and stop
the motion.
Origin (Home) Search Sequence of Operation
Information on this subject is contained in Chapter 4 of this manual,
within the topic, “Find Home
+/(CW), Find Home –/(CCW)”. Note that
the way in which a search is carried out if a home proximity limit
switch is present is different from the sequence when a home
proximity limit switch is not present. The differences are detailed in
Chapter 4.
Resetting the Current Absolute Position
In the event that an “Invalid Position” (input word 0 bit 10 is false),
occurs while in command mode, and no position error actually exists,
a command to “preset position” assigns a predetermined position
value as the absolute position. This establishes the current absolute
position of the axis, and allows subsequent absolute moves to take
place. A typical ladder diagram showing the command to “preset
position” is provided in rung 2:3 of the “Program Listing for Sample
Move” in Chapter 5 of this manual.
IMPORTANT
Turning the appropriate bit on will cause the axis to
move. Turning it off causes the axis to decelerate and
stop.