MODULE DETAILS

Module 8: MODBUS

NOMINAL DURATION IN HOURS

2 weeks (24 hours total time commitment)

This time commitment includes the structured activities, preparation reading, and attendance at each webinar, completing exercises, practical assessments and proctored assessments.

It is also expected that students spend additional time on readings, personal study, independent research and learning, practicing on remote labs and required software and working on any projects and assignments.

This module covers the basics of MODBUS Serial and MODBUS TCP as well as MODBUS RTU over TCP.

MODULE PURPOSE 

The purpose of this module is for the participants to understand the basics of MODBUS, one of the few industrial messaging protocols recognized by the Internet world..

PREREQUISITE AND/OR CO‑REQUISITE MODULES

Module 5: TCP/IP and VoIP (DITTCP605)

ASSESSMENT STRATEGY

METHODS OF ASSESSMENT

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, structured assessments, samples and questioning. This will include short answer questions on the knowledge content, the use of remote and virtual labs, and writing tasks to apply the learning to academic tasks.

CONDITIONS OF ASSESSMENT

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 to demonstrate how they are continuing to develop their VET knowledge and skills as well as maintaining their industry currency and assessor competence.

Questioning techniques should not require language, literacy and numeracy skills beyond those required in this module. The candidate must have access to all tools, equipment, materials and documentation required.

The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Assessments will be open book assessment and may be completed off campus. Invigilation software will be used for some assessments to ensure authenticity of work completed.

Model answers must be provided for all knowledge-based assessments to ensure reliability of assessment judgements when marking is undertaken by different assessors.

SUMMARY OF LEARNING OUTCOMES

1. Describe the operation of MODBUS Serial

2. Describe the operation of MODBUS TCP/IP

Learning Outcome 1

Describe the operation of MODBUS Serial

Assessment Criteria

1.1   Describe MODBUS RTU in terms of:

(a) Protocol stack

(b) Function Codes

(c) Absolute and relative addressing

(d) Master-slave (client-server) interaction

(e) Message structure (PDU and ADU)

(f) Error messages

1.2 Compare MODBUS RTU and MODBUS ASCII

Learning Outcome 2

Describe the operation of MODBUS TCP/IP

Assessment Criteria

2.1   Explain how MODBUS handles 32-bit and 64-bit numbers

(a) Modified ADU

(b) Port numbers

Delivery mode

Online and/or face-to-face