Product Overview

The UCU-22, UCU-23, and UCU-24 control units launched by ABB Industrial Drives are the core components in the field of industrial transmission control. These control units are mainly used to precisely regulate the operating status of various motors. On industrial automation production lines, they can accurately control the speed, direction, and torque output of motors based on preset programs and real-time feedback signals, thereby ensuring the stable and efficient operation of production equipment. From the perspective of appearance design, they adopt a compact structure. 

Precautions

Installation environment requirements: It should be installed in a dry, well ventilated environment without severe vibration and electromagnetic interference. High temperature environment (over 50 ° C) may cause overheating of electronic components inside the control unit, affecting its performance and service life; High humidity environment (humidity greater than 85%) may cause electrical short circuit faults; Severe vibrations may cause internal components to loosen, resulting in poor contact and other issues; Strong electromagnetic interference may interfere with the transmission of control signals, leading to abnormal control. Therefore, it is necessary to choose a suitable installation location during installation, such as being away from strong electromagnetic interference sources such as large motors and transformers. If necessary, shielding measures can be taken.

Electrical connection specifications: When making electrical connections, it is necessary to strictly follow the product manual to ensure that the wiring is firm and correct. Incorrect wiring can lead to serious electrical faults such as short circuits and open circuits, damaging control units and motor equipment. At the same time, attention should be paid to the input and output voltage and current parameters of the control unit, and appropriate power sources and loads should be connected. It is strictly prohibited to operate beyond its rated parameters to prevent equipment damage from overvoltage and overcurrent.

Communication parameter settings: When communicating with other devices, it is necessary to correctly set communication protocol, baud rate, data bits, parity bits, and other parameters. The communication parameters between different devices should be matched with each other, otherwise it may cause communication failures and prevent data exchange and collaborative control. During the system debugging phase, it is necessary to carefully check the communication parameter settings to ensure stable and smooth communication.

Maintenance points: Regularly inspect and maintain the control unit, including checking whether the wiring is loose, whether there is dust accumulation on the module surface, and whether the cooling fan is running normally. Loose wiring may lead to increased contact resistance, affecting the stability of equipment operation; Excessive accumulation of dust may affect heat dissipation and cause equipment overheating; A faulty cooling fan may cause the control unit to overheat and damage internal components. If any abnormal situation is found, it should be dealt with in a timely manner, such as tightening the wiring, cleaning dust, replacing faulty fans, etc., to ensure the continuous and stable operation of the control unit.

Similar model supplement

ABB UCU-30 series: Compared with UCU-22, UCU-23, and UCU-24, the UCU-30 series has further expanded its functionality. It has added more communication interface options, in addition to the common RS-485 and Ethernet interfaces, it also supports CANopen protocol interfaces, which can meet some industrial application scenarios with special requirements for communication protocols. In terms of motor control performance, the UCU-30 series has higher control accuracy, with speed control accuracy up to ± 0.05% and torque control accuracy up to ± 0.5%. It is suitable for high-end manufacturing industries that have extremely strict requirements for motor control accuracy, such as semiconductor manufacturing equipment, precision medical equipment production equipment, etc.

ABB UCU-15 series: This series is positioned as an entry-level product and is relatively simplified in terms of functionality and performance compared to UCU-22 and others. It is mainly suitable for small industrial enterprises or simple automation equipment with low control function requirements and limited budget. The UCU-15 series only supports Modbus RTU communication protocol. In terms of motor control, the speed adjustment range is relatively narrow, from 0-2000 revolutions per minute, and the control accuracy is slightly lower, with a speed control accuracy of ± 0.5% and a torque control accuracy of ± 3%. But it has cost advantages, relatively low prices, and can meet the basic automation control needs of small businesses.

Operation principle and hardware

Hardware description

The control unit is an interface for external converter control signals, and it controls converter modules via fiber optic links. The control unit contains a control board and connector boards. The control unit contains integrated branching unit functionality for collecting and storing real-time data from the converter modules to help fault tracing and analysis. The data is stored on a memory card which can be analyzed by

ABBservice personnel.

The control unit requires an external 24 V DC power source. It has three option slots for I/O extensions, encoders and fieldbus adapters and functional safety modules,and aremovable memoryunit. If it is necessary to replace the control unit, you can keep the parameter settings by moving the memory unit from the defective control unit tothenewone.ThecontrolunithasoneoptionslotforconnectingaRDCODDCS communication option module. The control unit also has a connection for a control panel.

Thedrive-to-drive link (XD2D) is a daisy-chained RS-485 transmission line that allows basic master/follower communication with one master and multiple followers. The X485 connection provides a connection for the optional CIO-01 I/O module.

The control unit has two Ethernet ports for control network and two Ethernet ports fortool/gatewaynetwork.Environmentalsensorsonthecontrolunitmeasurehumidity and temperature

Mechanical installation

Examining the delivery

Makesurethat these items are included:

• controlunitwiththeI/Oconnector plugs

• memoryunit(UMU-01)

• microSDHCflashmemorycard(insertedinitsslot inside the memory unit)

• optionslotadapters(USCA-02)

• real-timeclock battery (BR2032).

Makesurethat there are no signs of damagetotheitems.

￭ Identifying different control unit types

Before you install the control unit, make sure that it has the correct control program.

The control program is shown on the label attached to the memory unit.

Makesurethat the control unit is correct for your equipment configuration.

Additional information on the connections

￭ Powersupplyforthecontrol unit (XPOW)

Refer to the control unit connector data for the current and voltage ratings of the power supply.

Connect an additional external power supply to the free +24 V and GND terminals of the XPOWterminal block if:

• thecontrolunitmustbekeptoperationalduringinputpowerbreaks,forexample,because of continuous fieldbus communication

• immediaterestartisnecessary after a power break (that is, no control unit power-up delay is permitted).

￭ Digital interlock (DIIL)

Digital interlock input (DIIL) terminal is originally intended for interlock signals that stop the drive/unit when necessary. In the ACS880 primary control program, DIIL terminal is the source for the run enable signal by default. The inverter unit or drive cannot start, or it stops when there is no DIIL signal. In other control programs (and units), the default use of the DIIL terminal varies. Refer to firmware manual for more information.

Note: This input is not SIL or PL classified.

￭ Control panel connection (XPAN)

The XPANconnectorcanbeusedtoconnectanassistant control panel or FDPI-02 diagnostics andpanelinterfaceunittothecontrolunit.WithFDPI-02,itispossibleto connectonecontrolpaneltotwoormorecontrolunitsinachaintopology,alsoknown asapanelbus.Formoreinformation,refertoFDPI-02diagnosticsandpanelinterface user’s manual (3AUA0000113618 [English]).

The XPANTERMswitchsetsthetermination for the panel bus. Must be set to ONif thereisnopanelbus,orifthecontrolunitisthelastoneinapanelbus.Onintermediate units in a panel bus, set termination to OFF (1).

￭ TheXD2Dconnector

The XD2DconnectorhasanRS-485connection that can be usedfor

• basicmaster/follower communication with one master drive/unit and multiple followers

• fieldbuscontrol through the embeddedfieldbus interface (EFB)

• drive-to-drive (D2D) communication implemented by application programming.

Refer to the firmware manual for the availability of these features and related parameter settings.

Terminate the bus on the units at the ends of the drive-to-drive link. Disable bus termination on the intermediate units.

Useashieldedtwisted-paircablefordata,andanotherpairorawireforsignalground(nominalimpedance100 165ohm,forexampleBelden9842).Forthebestimmunity use high quality cable. Keep the cable as short as possible. Avoid unnecessary loops and parallel runs near power cables such as motor cables.