Rockwell Automation GMLC Reference Manual - Manual (Page 352)

Publication GMLC-5.2 - November 1999
Watch Control 315
After the registration event occurs, the Registration_status variable for the
axis is 1 (true). See the System Variables chapter of this manual for more
information on variables.
Windowed Registration
When you select Use Window on the Registration page, the selected trip
state causes a registration event only if it occurs when the axis is within
the window defined by the minimum and maximum positions, as shown
below.
Enter values or expressions for the desired absolute positions that define
the position window, within which the selected trip state of the
registration input is valid. Windowed registration is useful to ignore
spurious or random transitions of the registration sensor and improve the
noise immunity of high-speed registration inputs.
Registration
Input
Registration_status
= 1
Registration_status
= 0
Registration
Event
Occurs Registration
Event
Set Up
Position Window
Axis Position
+ –
Minimum
Position
Maximum
Position