Rockwell Automation 999 IMC S Class Compact Motion Controller (Cat. No. 4100-999-122) - Manual (Page 115)

Understanding IMC-S/23x Setups 5-35
Publication 999-122 - January 1997
2.
Absolute_Serial
Absolute_Serial is a specific absolute homing procedure. You can only
select Absolute_Serial when you use both of the following:
•
Serial output absolute encoders.
•
Allen-Bradley AEC converter card
With this system configuration, the IMC S Class determines the
transducer’s absolute position using a single home command.
Passive Homing
Passive homing re-defines the current absolute position of the axis on
the next occurrence of the encoder marker. Passive homing is most
commonly used to calibrate
MASTER ONLY axes to their markers,
although it can be used on SERVO axes as well. Passive homing is
identical to active homing to an encoder marker as described above
except that no motion is commanded–the IMC-S/23x just waits for the
marker to occur.
If you are setting up a physical axis configured as MASTER ONLY in
the application setup menu, select PASSIVE as the homing procedure.
If you are setting up an AxisLink virtual axis, passive homing is selected
automatically and the following message appears:
If you Select: This happens:
256/255 and
press ENTER. The 1326-MOD-VD: catalog number is appended to
include the full Allen-Bradley 256 turn dual resolver
package part number. When 256/255 is selected, an
internal variable called Turns Range inside the
IMC-S/23x is set to 256.
CUSTOM and
press ENTER. The IMC-S/23x selects the following:
Custom turns range = (turns range)
1. Enter a value between 1 and 256 for the Turns Range
of the master vernier device. The custom option is
solely intended for future supported dual resolver
packages.
2. Press ENTER.
Select: VIRTUAL AXIS 0
Homing for Virtual Axis is PASSIVE !