Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 115)

Publication 1784-UM003A-EN-P – June 2003
Naming & Configuring Your Motion Axis 107
Drive Resolution
Type in the number of counts per motor revolution. This value applies to all
position data. Valid values range from 1 to 2^32 - 1. One Least Significant Bit
(LSB) for position data equals 360° / Rotational Position Resolution.
Note: Drive Resolution is also referred to as Rotational Position
Resolution.
When you save an edited Conversion Constant or a Drive Resolution value, a
message box appears, asking you if you want the controller to automatically
recalculate certain attribute settings. (Refer to Conversion Constant and Drive
Resolution Attributes for a list of these attributes.)
Drive Resolution is especially helpful for either fractional unwind applications
or multi-turn applications requiring cyclic compensation. You can modify the
Drive Resolution value so that dividing it by the Unwind Value yields a whole
integer value. The higher the Drive Resolution setting, the finer the resolution.
Real Time Axis Information
Attribute 1/Attribute 2
Select up to two axis attributes whose status are transmitted – along with the
actual position data – to the Logix processor. The values of the selected
attributes can be accessed via the standard GSV or Get Attribute List service.
Note: The servo status data update time is precisely the coarse update
period.
If a GSV is done to one of these servo status attributes without the having
selected this attribute via the Drive Info Select attribute, the attribute value is
static and does not reflect the true value in the servo module.
Change Catalog…button
The Change Catalog button accesses the motor database and provides for
selecting a new motor catalog number. There are three boxes that can be used
for refine the selection process.