Machinery pre starts


Machinery Pre Starts
Unlimited, ready-to-go digital pre starts
with our free pre start app
Risk management and corrective actions
Risk Management &
Corrective Actions

Know the hazards and how to control
them with our automated risk
management reports
Document management and audit trail
Document Management
& Audit Trail

Leave paper-based systems behind and
manage and store crucial compliance
information digitally
Dashboards and reporting
Dashboards & Reporting
Get information and insights on the
compliance status across your fleet
and sites



    Machinery Risk Assessments


    Machinery Risk Assessments
    Industry leading and specific to your
    machines. Powered by the Machinery Compliance Engine (MCE)
    Service and maintenance management
    Service & Maintenance

    Keep your machines in top condition
    with a preventative maintenance
    Safe Operating Procedures

    Access easy-to-read, comprehensive
    SOPs specific to your machines
    MySite subcontractor machinery management
    All the tools to manage machinery
    compliance obligations and uphold
    safety on-site
    View All Features
      See how Plant Assessor can transform your business
      See Plant Assessor in action

      GET A DEMO

            Case Studies
            Hear from our clients
            Find us at industry events
            Find industry-specific guides
            Educational content
            News & Articles
            Industry news and events
              Safety Legislation
              We keep up with safety legislation
              so you don't have to
              Find Demos, overviews and informative
              videos here
              View on-demand and upcoming webinars
              See our current promotions
                Is your machinery safety System up to spec?
                Complete our Machinery Safety System Health Check to receive a free personalised report on how to improve your compliance gaps.

                HEALTH CHECK


                  All of our frequently asked questions
                  Knowledge Base
                  How to use our software
                  View a Demo
                  Let us walk you through Plant Assessor features
                  Release Centre
                  Product updates and release information
                      We are here to help
                      Have a question about Plant Assessor platform? Speak to our friendly support team.

                      CONTACT US



                        Demystifying e-stops



                        Over the years I have written many technical articles and regularly they have included safety requirements for various types of machinery. Of the safety requirements in these articles perhaps the most common and often asked about is the emergency stop, which is also often referred to as an e-stop. The questions I get range from what is it through to the application of emergency stops on specific machines.


                        What is an emergency stop (e-stop)?

                        AS4024.1604:2014 Safety of Machinery – Design of controls, interlocks and guarding - Emergency stop - Principles for Design contains the definition and other information for emergency stop devices.

                        Definition: An emergency stop device is a manually actuated control device used to initiate an emergency stop function.

                        Type: The types of actuators that may be used include the following:

                        – mushroom-type pushbuttons;
                        – wires, ropes, bars;
                        – handles;
                        – in specific applications, foot-pedals without a protective cover.

                        Colour: The actuators of the emergency stop must be coloured red and where a background exists be yellow as far as is practical.

                        Location: An emergency stop device shall be located at each operator control station.

                        This seems quite straight forward, a red device with a yellow background located at the operator position. I think that most people involved with machinery already know this. The most common question I get is not what but how to apply an e-stop to a machine.

                        The definition of an emergency stop device above contains the words “initiate an emergency stop function”. An emergency stop function is defined as – a function that is intended to:

                        – avert arising, or reduce existing, hazards to persons, damage to machinery or to work in progress,

                        – be initiated by a single human action

                        It is this definition that allows us to determine how to apply an emergency stop to a machine or more simply to answer the question, which parts of a machine should be affected by the e-stop?

                        As an example, in AS 1418.8-2008 Cranes, hoists and winches – Special purpose appliances Section 4 mandates the inclusion of an emergency stop device on all tipping truck hoist systems. I am often asked how a truck could be driven once the e-stop is actuated. Knowing what we do now we can consider which parts of the machine the emergency stop will affect to meet the definition above. If the emergency stop was applied to the engine of the truck then additional hazards would be created and the definition “avert arising, or reduce existing, hazards to persons, damage to machinery…” would not be met due to the loss of steering and braking as additional hazards such as collision and crushing would be created. However, if the e-stop function was applied only to the tipping hoist power system then the definition would be met.

                        If you have a particular question regarding emergency stops please contact us.



                        Disclaimer: This information is intended to provide general information on the subject matter. This is not intended as legal or expert advice for your specific situation. You should seek professional advice before acting or relying on the content of this information. 

                        Ready to find out more?

                        See what Plant Assessor can do for your business with a demo.

                        Request a demo