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Elements and Performance Criteria

1. Prepare to design computer applications
   • Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified, obtained and applied
2. Hazards are identified, WHS/OHS risks assessed, and control measures and workplace procedures are implemented in preparation for work
3. Scope of proposed control system is determined from the design brief and in consultation with relevant person/s
4. Design development work is planned to meet scheduled design brief timelines in consultation with person/s involved on the worksite
5. Develop computer applications designfor control process
   • Control devices, control systems and control programming methods are applied to the computer applications design
6. Alternative concepts for the design are tested in accordance with the requirements outlined in the design brief
7. Safety specifications and budget constraints are considered in the design process
8. System design draft is checked for compliance with the design brief, relevant industry standards and regulatory requirements
9. System design is documented for submission to relevant person/s for approval
10. Solutions to unplanned situation are dealt with in a manner that minimises risk to personnel and equipment in accordance with workplace policies and procedures
11. Obtain designapproval for computer applications
    • System design is presented and explained to client representative and/or relevant person/s
12. Requests for alterations to design are negotiated with relevant person/s in accordance with workplace policy
13. Final design is documented and approval obtained from relevant person/s
14. Quality of work is monitored in accordance with performance agreement/specifications and/or workplace procedures or industry standards

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the Companion Volume Implementation Guide.

Designing a computer-based control system must include at least two of the following:

configure and test a PLC peer to peer network configure and test a PLC hierarchical network configure and test a PLC field bus style network develop PLC code using a structured text programming tool develop PLC code using a sequential function chart programming tool design a simple HMI interface using a typical touch screen device use system diagnostics to fault find hardware/software issues program and test a proportional integral derivative (PID) functional control/program block

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements designing a programmable logic controller (PLC) computer-based control system dealing with unplanned situations in accordance with workplace procedures in a manner that minimises risk to personnel and equipment developing computer applications design obtaining design approval for computer applications planning and preparing to design of computer application for control processes testing design concepts by real or virtual prototyping, where it cannot be shown easily by other means, and confirming that particular aspects of the design meet specified requirements.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

alternative/enhancing programming methods bus monitor, including capturing and filtering communications methods and requirements, including: common protocols and interface standards communication mediums network types and topologies peer to peer networks remote input/output (I/O) requirements when networking/interfacing PLCs high-speed ethernet specification/requirements intelligent terminals/graphic interfaces installation and communication requirements proportional integral derivative (PID) computer-based control system and system applications relevant manufacturer specifications relevant job safety assessments or risk mitigation processes relevant specialist instructions, including interrupt driven applications, high-speed counters and positional encoders relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures system diagnostics techniques.

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