Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 67)

Installing the Assembly
Chapter 6
6Ć17
establishes the point of the next marker pulse following the limit switch
as the home position
stops the axis at the home position
You must re-establish the home position after each time power to the I/O
chassis backplane goes off, because the encoder feedback is incremental, .
Connecting Jog Reverse (Feedrate Override Enable)
Figure 6.9 shows details of how to connect jog reverse and feedrate
override enable. Follow these steps:
1. Provide a 3-pole selector switch to select between auto and manual
mode.
2. Connect one pole of the selector switch to a discrete input module
terminal. Use this input to control the auto/manual bit in the control
block. This bit controls whether the 1771-ES expander is in the auto
or manual mode.
3. Connect a second pole of the selector switch to the jog reverse
(feedrate override enable) terminal of the 1771-ES expander.
4. Connect a momentary-contact jog reverse switch to the selector
switch contact corresponding to manual on the second pole.
5. Connect a momentary-contact feedrate override switch to the selector
switch contact corresponding to auto on the second pole.