UNIT CODE

DITPLC611

UNIT TITLE

Create PLC programs using IEC 61131-3

APPLICATION

This unit describes the performance outcomes, skills and knowledge required to develop PLC programs as per IEC 61131-3.

The unit of competency is applied by technicians who develop software programs for programmable logic controllers.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.

ELEMENT

Elements describe the outcome of a unit of competency.

PERFORMANCE CRITERIA

Performance criteria describe the performance needed to demonstrate achievement of the element.

1.    Establish architecture of a Programmable Logic Controller (PLC)

1.1.      Identify the main features and functions of PLC system and components

1.2.      Determine the use of PLCs in safety programmable systems

1.3.      Establish the procedures for system checkout and testing

2.    Determine IEC 61131-3 concepts and common elements

2.1.      Determine the interfaces and software model of IEC 61131-3

2.2.      Apply IEC 61131-3 common elements such as character sets, identifiers, data types, variables and functions

3.    Use fundamental concepts in algebra

3.1.      Develop PLC programs adhering to programming rules

3.2.      Verify programs with a supervisor

3.3.      Make minor program changes

FOUNDATION SKILLS

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

UNIT MAPPING INFORMATION

No equivalent unit.

TITLE

Assessment requirements for DITPLC611 – Create PLC programs using IEC 61131-3

PERFORMANCE EVIDENCE

To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria included in the unit. The person must also:

• Develop a PLC program adhering to programming rules by using
  • a sequential function chart (SFC)
  • a ladder diagram (LD)
  • a function block diagram (FB)
  • structured text (ST)

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once.

KNOWLEDGE EVIDENCE

To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria included in the unit. This includes knowledge of:

• PLC components such as processors, power supplies, memory systems, input/output, and communications
• The use of ladder logic for simple digital functions
• The use of registers (words)
• The use of PLCs in safety programmable systems
• Procedures for system checkout and testing
• IEC 61131 parts
• IEC61131-3 concepts
• IEC 61131-3 common elements
• IEC 61131-3 programming languages: sequential function chart (SFC), ladder diagram (LD), function block diagram (FBD), structured text (ST)

ASSESSMENT CONDITIONS

There are no specific industry mandated conditions for this assessment.

All assessment must be completed in accordance with work health and safety standards.

Simulators may be used for the assessment.

Assessor Requirements:

   Assessors must:

•  hold the appropriate assessor competency standards as outlined in regulations; and
•  be able to demonstrate vocational competencies at least to the level being assessed; and
•  be able demonstrate how they are continuing to develop their VET knowledge and skills as well as maintaining their industry currency and assessor competence