1-8 Product Overview
Control Options The SMC-Flex controller offers the control options described below.
Important: The options listed in this section are mutually exclusive
and must be specified when ordering. An existing
controller may be upgraded to another control option by
replacing the control module. Consult your local
Allen-Bradley distributor.
Modes of Operation
(Pump Control)
Pump Control Option
➀
This option reduces surges during the starting and stopping of a
centrifugal pump by smoothly accelerating and decelerating the
motor. The microprocessor analyzes the motor variables and
generates commands that control the motor and reduce the possibility
of surges occurring in the system.
The starting time is programmable from 0…30 seconds, and the
stopping time is programmable from 0…120 seconds.
Figure 1.9 Pump Control Option
➀ Kickstart is also available with Pump Control.
100%
Motor Speed
Time in Seconds
Pump Start
Ramp Time
Run
Pump Stop
Stop Time
Pump stopping is not intended to be used as an
emergency stop. Refer to the applicable standard for
emergency stop requirements.
Pump stopping may cause motor heating depending
on the mechanical dynamics of the pumping system.
Therefore, select the lowest stopping time setting
that will satisfactorily stop the pump.
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