Rockwell Automation GMLC Reference Manual - Manual (Page 118)

Publication GMLC-5.2 - November 1999
Defining Homing 81
Absolute_MV
Absolute_MV is an absolute homing procedure. You can only use this
procedure with a transducer type of REC. When the Absolute MV
homing procedure is selected, the following fields become active.
Assembly Part #
For an Absolute MV homing procedure, select
• the default master resolver part number from the pulldown list, or
• Custom, if you are using a different master resolver.
Turns Range
If Custom is selected, the Turns Range field becomes active and an
integer with a value between 1 and 1,000,000,000 must be entered. See
the manufacturer’s specifications for the correct value for the Turns
Range.
Absolute Serial
Absolute Serial is a specific homing procedure. You can only select
Absolute Serial when you are using a serial output absolute encoder and
AEC is selected as the transducer type. When Absolute Serial is selected
as the Homing Procedure, the Turns Range field becomes active. You
must enter the turn range for the type of encoder/transducer that is used.
This is must be an integer between 1 and 1,000,000,000. See the
manufacturer’s specifications for this value.
Passive Homing
Passive homing redefines the current absolute position of the axis upon
the next occurrence of the encoder marker. You will most commonly use
passive homing to calibrate Master Only axes to their markers (although
you can use passive homing for Servo axes, too). Passive homing is
identical to active homing to an encoder marker, except that no motion is
commanded instead, the controller merely waits for the marker to occur.