Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 75)

limit. Using the example above, set the Minimum Speed Reference to 30Hz and the
Maximum Speed Reference to 60Hz.
Test run mode
Test Run Mode allows the controller to perform a test which will ramp the pump at a
specified speed in order to perform a test on the system and pump/motor. Test Run
Mode is triggered to start based on the state of DI 18. When DI 18 is closed, the test will
begin. When DI 18 is open, test run mode will stop. To configure Test Run Mode set the
test run speed and test run ramp time. The Test Run Speed is the speed that the controller
will ramp the pump to. The Test Run Ramp Time is the ramp used to reach the Test Run
Speed. This ramp is the time to ramp from stop (0 RPM) and the rated motor speed. The
Test Run Ramp Time applies to both acceleration and deceleration in Test Run Mode.
Feedback setup
The controller can utilize up to 3 feedback sources using the onboard IO. 2 of these
sources can be configured for the analog inputs (AI 53 and AI 54). The third can be set to
bus feedback which can be set through the onboard fieldbus communications.
When using analog inputs be sure to set the analog input configuration switches to the
appropriate feedback type. Refer to the Analog Input Configuration (Switches A53 and
A54) section for details on setting the analog input configuration switches. Refer to the
Common Terminal Wiring Configurations section in this manual for detail on wiring
external devices to the analog inputs.
If multiple feedback sources are selected then the Feedback Function [20-20] can be
configured. The Feedback Function determines how the multiple feedbacks will be used
to control the system.
Operation
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 73