Program Features; Contents Of This Chapter; Overview - ABB ACS880 Supplement Manual

Program features 15

3
Program features

Contents of this chapter

This chapter describes the distributed I/O bus and its features supported by the control
program.

Overview

Distributed I/O bus controls and supervises each cabinet fan separately. It detects
malfunctioning fans and indicates them with warning or fault messages. The control
program performs identification run for cabinet fans to detect nominal speed values of the
fans.
In ACS880-07CLC single drive, control unit of the diode supply unit acts as an I/O bus
master. Cabinet fans in drive cubicles are controlled with separate PWM (pulse-width
modulation) outputs. When the control program detects a malfunctioning fan, DDCS
communication delivers the warning code from diode supply unit to inverter unit. You can
access distributed I/O bus settings of the diode supply unit via panel bus or Drive
composer PC tool.