VLT AQUA Drive Lab # 2
(Open Loop Speed Control)
Introduction
In this lab you will set up a VLT AQUA drive to simulate a wastewater pumping application.
The drive will be set up in an open loop configuration. In an “open loop” configuration the
reference signal fed into the drive is directly proportional to the speed it will run at. The drive
will receive the control signals by means of a SCADA system. The SCADA system will
provide the VFD with an enable (safety) signal, a start stop command and the 0-10 volt speed
reference. The drive itself will have one relay output programmed to indicate when it is
running. For this lab, you will use the switch box found in your demo case to simulate the
SCADA signals. The instructor will explain how the switch boxes work before you begin the
lab.
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4/29/15 2:47 PM