This describes the required skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of safe working practices and diagnosing and rectifying faults in digital control systems

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEIA Digital electronic control systems

Evidence shall show an understanding of digital electronic control systems to an extent indicated by the following aspects

T Digital control systems

Comparison between analogue and digital signals

Advantages of digital control systems

Digitalanalog control system

Logic gates

Truth tables

Digital testing devices

T Numbering systems

The binary number system

The Octal number system

The hexadecimal number system

Binary addition and subtraction

Conversion between numbering systems

Binary Coded Decimal BCD

Gray code

The American Standard Code for Information Interchange ASCII

T Combinational Logic Networks

Precautions when handling electronic devices due to electrostatic discharge ESD

Truth tables

Basic operation and characteristics of logic devices

Logic probes

Verification of operation of logic circuits

T Logic families and specifications

TransistorTransistor Logic TTL

Complementary Metal Oxide Silicone CMOS logic families

the unit load concept

specifications and features of TTL TTL low power Schottky LS and CMOS logic families

three state and open collector logic

input and output voltage characteristics for CMOS and TTL

comparison of TTL with CMOS logic families

Unit load

noise margin

interfacing different logic families

Tristate logic devices

T Encoders and Decoders

weighted and unweighted codes

Gray

BCD

ASCII

Half and full adder

Encoders decoders

error detection

decoder and encoder ICs

multiplexer and demultiplexer ICs

T Flipflops

RS flipflops

D flipflops

JK flipflops

truth tables and operation

debouncing a switch

timing diagrams

Sequential logic

State tables and timing diagrams

T Registers

shift registers

data latches

T Counters

ripple counters using JK flipflops

typical IC types

characteristics and operation

Ripple counters

Use of feedback to modify count

Circuit verification of a ripple counter

Synchronous counters

Series and parallel data transfer

Multivibrators

Interconnecting digital circuits to perform an application

T Digital to analog conversion

Industrial applications of DA converters

Summing DA converters

RR DA converters

Verification of circuit operation of an IC DA converter

T Analog to digital conversion

Industrial applications of AD converters

Digital ramp dual slope successive approximation and simultaneous flash AD converters

Verification of circuit operation of an IC AD converters

T Display devices

Liquid Crystal Display LCD devices

Light Emitting Diode LED devices

Operation and Characteristics

Seven segment LED displays

Drive requirements

Current limiting

Multiplexed displays

Seven segment encoding chips

Emerging display technologies

T Digital fault finding

General fault finding principles

Common digital faults

Digital test equipment

Locating a fault

T Interfacing logic devices to external loads

Interfacing with a transistor

Interfacing with a relay

Solid state switches

Optoisolator

Verification of circuit operation of an optocoupler

T Programmable logic devices

Applications of programmable logic devices

Types of programmable logic devices

Comparison between different programmable logic devices

Programmable Array Logic PAL

Programmable Logic Devices PLD

Field Programmable Gate Arrays FPGA

Programming and verifying correct operation of a programmable array logic device

This provides essential advice for assessment of the unit and must be read in conjunction with the performance criteria and the range statement of the unit and the Training Package Assessment Guidelines

The Evidence Guide forms an integral part of this unit It must be used in conjunction with all parts of the unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the Industrypreferred model for apprenticeships However where summative or final assessment is used it must include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment It is recognised that in some circumstances assessment in part or full can occur outside the workplace However it must be in accord with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work influence decisions about howhow much the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites shall be met

Evidence for competence in this unit shall be considered holistically Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the required skills and knowledge as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Diagnose and rectify faults in digital subsystems of electronic controls as described in and including

A

Applying logical diagnostic methods

B

Using fault scenarios to test the causes of system faults

C

Identifying faults and their cause and competency needed to rectify them

D

Rectifying faults in system digital subsystems

E

Verifying that the system operates correctly

F

Documenting fault rectification

G

Dealing with unplanned events by drawing on required skills and knowledge to provide appropriate solutions incorporated in a holistic assessment with the above listed items

Note

Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

The resources used for assessment should reflect current industry practices in relation to diagnosing and rectifying faults in digital systems of electronic controls

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note

Competent performance with inherent safe working practices is expected in the industry to which this unit applies This requires that the specified required skills and knowledge are assessed in a structured environment which is primarily intended for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the required skills and knowledge described in this unit

Concurrent assessment and relationship with other units

For optimisation of training and assessment effort competency development in this unit may be arranged concurrently with unit

The critical aspects of occupational health and safety covered in unit UEENEEEA and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE101A and other discipline specific occupational health and safety units shall be incorporated in relation to this unit.