The process logical modelling fills the generally valid SELMO standard with the individual process. Digitally and so that all trades follow the same picture: step by step and bit by bit. The “digital first” principle makes project planning easier and ensures true digitisation.
Programs know no flexibility. At least not when non-digital modules are used as the basis for programming. For complete automation, it must be possible to consider processes independently of the technical solutions. To achieve this, SELMO looks directly at the bit in the sequential logical process and models machines instead of programming them. The result is a flexible and fully controllable system.
The SELMO method considers machine processes on four levels, all of which are interrelated. The standard functions, which are the same for all machines, are already in the open, digital SELMO standard. We record the individual process on four levels: 1. logical sequence of the machine process 2. system relevant signals and monitoring units in bit resolution 3. customizable parameters as blocks in the PLC HMI Code Generator 4. generated HMI from the sum of all data points
The mechanic’s gaze in the sequential engineering focuses on the mechanical assemblies. Some think in terms of inputs and outputs, others in terms of numbers and codes. SELMO puts the digital in front to enable EVERYBODY to work together on digital project planning and documentation. And to set every bit precisely. The effort of process modelling is not in vain. It is unusual at the beginning – but it pays off forever. The digital specification sheet is created automatically. All trades follow the same digital picture. Statements such as “We don’t have to define it exactly now, because it will be changed again anyway” are no longer justified. A modelled machine from a bit-perspective knows no blind spots and can be completely virtually mirrored, monitored, optimised and extended. With SequenceControl and BitControl, errors or malfunctions are displayed in real time for a precisely definable machine unit – and can be corrected directly. This turns the black box into a transparent and easy-to-operate machine that is seamlessly embedded in the automation process. In addition, all processes are always up to date – and infinitely open to innovation.
Buy once, stay flexible.
If machines are modelled from the process, it is completely irrelevant which technical means are used to implement a certain command or process state. The appropriate drivers for machines can be selected or developed and used as a template for any other functional application. SELMO’s declared goal: With an open, globally available driver library and logic, digital function blocks only have to be purchased once and can then be further developed individually within the company and used again and again for additional machines. At the same time, SELMO implements the need for universally applicable norms and standards, which form the foundation for uniform automation in Industry 4.0.