Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE User Manual
Page 94
4-12
Application Profiles for the SMC Dialog Plus Controller
Figure 4.11 Trolley with Soft Start and Preset Slow Speed Option
Problem: A trolley application required a slow speed, as well as
soft start, to eliminate product tipping while accelerating
from rest. A variable frequency drive was considered.
However, variable speed was not required during the run
cycle. A cost-effective solution was desired.
Solution: The SMC Dialog Plus controller with the Preset Slow
Speed option was installed. The Preset Slow Speed of
15% of rated speed was selected. After running at 15
of full speed for a few seconds, a 25-second ramp start
was selected to accelerate the motor to full speed. The
SMC Dialog Plus controller with Preset Slow Speed
helped protect against product tipping during start-up. In
addition, the desired acceleration control was provided at
a reasonable cost.
Motor
240 Volts
10 HP
Tow Chain