Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE User Manual
Page 99
Application Profiles for the SMC Dialog Plus Controller
4-17
Figure 4.16 Shredder with Soft Start
Problem: Because of power company restrictions, a metal shredder
required a reduced voltage start. Occasionally, a jam
would occur during the shredding process. Additionally,
the equipment ran unloaded for long periods. An
autotransformer-type starter had been used in the past.
Solution: The SMC Dialog Plus controller was installed,
facilitating a reduced voltage start. The controller also
provided jam detection, which helped protect against
excessive motor heating when a jam condition was
encountered. The Energy Saver feature of the SMC
Dialog Plus controller reduced the voltage to the motor
when the motor was running lightly loaded. The built-in
overload feature of the controller saved valuable panel
space.
480 Volts
200 HP
Scrap
Input
Shredder Teeth
Output
Gearbox
Motor