Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 37)

Positioning with Allen-Bradley PC
Chapter 4
4Ć13
Initialize Home
Through a command block you can generate an initialize home command.
The initialize home operation assigns the home position value (which you
specify in the parameter block) to the current axis position. Its effect is
the same as that of the preset operation, except that the new position value
is the home position value.
Now that you have been familiarized with the general concepts of how the
servo positioning assembly functions in a closed-loop positioning system
and in a PC system, you are ready for specific details of the servo
positioning assembly in chapter 5.
Summary