Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 86)

4-4 Application Profiles for the SMC Dialog Plus Controller
Figure 4.3 Tumbler with Soft Start and SMB Smart Motor Braking Option
Problem: A tumbler drum used in the de-burring process was
breaking the drive chain because of the uncontrolled
acceleration from the across-the-line starter. To increase
production on the drum, the coasting time on stop had to
be reduced. Previous solutions were a separate soft start
package plus a motor brake, which required additional
panel space and power wiring. A small enclosure siz
and simplified power wiring were needed to reduce the
cost of the controls. Because a PLC was controlling
several other processes in the facility, communication
capabilities were desired.
Solution: The SMC Dialog Plus controller with the SMB Smart
Motor Braking option was installed on the process. The
Soft Start provided a smooth acceleration of the drive
chain, which reduced downtime. The controlled
acceleration made positioning for loading/unloading
easier. The SMB Smart Motor Braking option allowed
the system to be stopped quickly, improving productivity.
Further, the SMB Smart Motor Braking option did not
require additional panel space or wiring. The SMC
Dialog Plus controller’s built-in overload eliminated the
need to mount an external overload relay in the
enclosure, saving further panel space. The
communication feature of the SMC Dialog Plus
controller allowed for remote starting and stopping of th
process from a PLC.
Tumbler Drum
Loading Door
Motor
Drive Chain
480 Volts
150 H