Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE User Manual
Page 113
Application Profiles for the SMC Dialog Plus Controller
4-31
Figure 4.30 Chain Conveyor with Soft Start
Problem: A chain conveyor was used to transport bundles of paper.
Because of high starting torque, the chain was breaking
once per day. Maintenance of the conveyor caused
interruptions in the production schedule and lost
productivity. Line surges were also a frequent problem.
Solution: The SMC Dialog Plus controller was installed. A 12-
second soft start was programmed, reducing the starting
torque and the mechanical shock to the chain. It was
estimated that the SMC Dialog Plus controller paid for
itself in three months due to the reduced downtime. A
line side protective module (MOV) was installed to
suppress the voltage transients.
Bundle Bundle
Chain
Motor
480 Volts
7.5 HP