Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 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

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador Página 94