MUL1-R3 datasheet(14/28 Pages) ABB

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14 ABB general purpose drives ACS310 | Catalog

Control program example

One of the ACS310’s integrated pump and fan features is

soft pump and fan control (SPFC), which is used for pump

and fan alternation applications where lower pressure

peaks are desirable when a new auxiliary motor is

connected on-line.The following example explains how

ACS310 can operate up to 4 to 5 pumps or fans in parallel

based on the capacity demand. In this example, we use

three parallel pumps to maintain the water pressure in the

pipelines.

The drive controls the motor of pump 1, varying the motor

speed to control the pump capacity. This motor is the

speed regulated motor. When the demand exceeds that of the

first motor’s, the drive automaticly starts an auxiliary pump.

The speed of the first pump is adjusted so that the actual

value follows the process reference.

Parameter settings

Before starting the configuration, ensure that the drive has

been installed properly and that the electrical connections are

complete. Connection example can be found from ACS310

User’s manual.

Startup data

The correct motor parameters are set within parameter group

99. Then select SPFC control macro using parameter 9902.

This software macro updates the defined list of parameter

values to their default values.

Pump and fan control parameters

Parameters can be found in parameter group 81. First change

Short menu to to Long from parameter 1611 in group 16. This

shows the full parameter group list including group 81.

Frequency limits to start and stop auxiliary motors

Parameter 8109 START FREQ 1 is set to 50 Hz, which is

also the default value. Since we have in this example also

another auxiliary motor, parameter 8110 START FREQ 2

is set to 50 Hz for the second auxiliary motor.

To stop an axiliary motor we set parameters 8112 LOW

FREQ 1 and 8113 LOW FREQ 2 to 25 Hz.

MUL1-R3 Datasheet(PDF) 14 Page - ABB