Pump Control Option; Preset Slow Speed Option - Rockwell Automation SMC Dialog Plus User Manual

Pump Control Option

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 1.13 Pump Control Option
100%
Motor
Speed
Pump Start
ATTENTION: Pump stopping is not intended to be
used as an emergency stop. Refer to the applicable
!
standard for emergency stop requirements.
ATTENTION: 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.

Preset Slow Speed Option

This option can be used in applications that require a slow speed jog
for general purpose positioning. Preset Slow Speed provides either
7% of base speed (low) or 15% of base speed (high) settings in the
forward direction. Reverse can also be programmed and offers 10%
of base speed (low) and 20% of base speed (high) settings.
Product Overview
Run
Time (seconds)
1-13
Pump Stop