Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 12)

Introducing the Servo Positioning Assembly
Chapter 2
2Ć6
Feature Benefit
optically isolated guards against noise entering the
analog output [1] backplane circuits and limits the
potential for damage due to improper
connection
external hardware start [1] synchronizes moves with other axes
encoder input selectable
for highĆtrue or lowĆtrue
[1] compatibility with a wider range of
encoders
synchronized start of
feedrate override
[1] activates a preĆloaded feedrate
override value to change speed on
several axes simultaneously
sensing of customer
power supply loss
[1] an orderly shutdown of the servo
system and to provide you with this
diagnostic information
feed forwarding [1] to allow you to reduce following error
by up to 99.9% without increasing
instability
constantĆvelocity
command
[1] runs an axis continuously at a selected
velocity (could apply to controlling a
conveyor with no programmed end
point)
moveset override [1] Modifies a moveset while it is being
executed
diagnostic words in the
status block
[1] provide your ladderĆdiagram program
with access to diagnostic information
for
hardware and program
troubleshooting