effective PLC programming is essential for your business
Programmable logic controllers (PLCs) are key components in industrial automation and control systems. PLC programming is an essential task that skilled industrial electricians perform during the configuration of automated control systems for your business. If you are an Australian business looking to install new automation controls, robotic systems or upgrade your existing equipment, you need a skilled PLC programming specialist to help you.
What is a programmable logic controller?
A programmable logic controller (PLC) is a microprocessor-based computer without a keyboard, mouse, or monitor. In general, it is a basic combination computer developed for controlling and monitoring harsh industrial environments and operations. This “computer” has a strong and unique structure that can withstand harsh conditions, including extreme heat, cold, dust, and extreme humidity. At Robycs Technology, we are Siemens automation integrators and recommend Siemens to our customers due to its flexibility with other systems and robust nature.
How does PLC work?
A PLC receives information from input devices and connected sensors, processes the received data, and triggers the required outputs according to its pre-programmed parameters. Based on these inputs and outputs, a PLC can easily monitor and record runtime data such as temperature, machine productivity, generate alarms when the machine is down, auto start, stop processes, etc.
The PLC programming language is easy to understand and generally includes key functional features such as:
I/O: The CPU maintains and processes the data while the input and output modules connect the PLC to the machines.
Communications: PLCs are developed to interface with a variety of other systems. A PLC provides communication protocols and ports to facilitate communication between itself and other systems.
HMI: Users need a Human Machine Interface (HMI) to interact with the PLC. Operator interfaces can be large touch screen panels or simple displays that allow users to enter and review PLC information in real time.
PLCs have several other features depending on the size and type of industry and application. How each PLC works and interacts with other systems and processes depends on how the “computer” is programmed.
What is PLC programming?
PLC programming is the task of designing and implementing control programs depending on the customer’s needs. A PLC program consists of a set of instructions in textual or graphical form that represent the logic to be executed for specific industrial real-time projects and applications. A proprietary PLC programming software comes from a specific manufacturer’s PLC hardware that allows the entry and development of user application code, which can ultimately be downloaded into the PLC hardware.
A PLC usually runs two different programs: the operating system and the user program.
The operating system organizes all CPU functions, operations, and sequences that are not related to a controlling task. For example: managing a hot restart and a warm restart, updating and outputting the input and output process image tables, communicating with programmable devices, etc.
A user program is a combination of various functions that are required to process an automated task. It must be created by users and must be downloaded to the PLC CPU. Some of the tasks of the user program include: setting up all conditions to start the specified task, executing interrupts, and handling errors.
The PLC programming language varies depending on the manufacturer. Some manufacturers have common programming languages and others have common programming languages. Some of the standard PLC programming languages are basically of two types:
Text Language: List of Instructions and Structured Text (ST)
Graphical language: ladder diagrams (LD), functional block diagram (FBD) and sequential function diagram (SFC)
Compared to text-based languages, graphical languages are preferred by many users for PLC programming due to their simple and convenient programming features. All necessary functions and application blocks are available in the standard library of any PLC software. These function blocks include timers, counters, strings, comparators, numeric, arithmetic, bit shifters, calling functions, etc.
An industrial automation specialist can help explain the different types and features of PLCs to help you achieve the best possible results for your business.
When do businesses need PLC programming?
As we mentioned earlier, programmable logic controllers (PLCs) are used to control machines and are components that make decisions based on a custom program. Most machines in the world have a PLC unit, from assembly lines to amusement parks.
Most new factories are fully automated and all machines are controlled using a PLC, meaning that basic PLC knowledge and skills are not only relevant but required to operate, maintain and program these machines.
What happens if a system does not have proper PLC programming?
Can your business handle machinery breakdowns? If the PLC breaks down, the machine will not work and this will cause a number of problems for a business:
Production stops
Time is wasted for a PLC specialist to come and repair the machine
Customer needs are not met
Loss of company income
Programming PLCs is important for improving their processes: making them faster, more efficient and cost-effective, and can also add an element of future-proofing to the organization.
Why effective PLC programming is essential for your business
There are many compelling reasons to consult a specialist industrial electrician for PLC programming in Sydney:
Peace of mind: Having properly programmed PLCs can prevent any inconsistencies in the process of controlling and monitoring industrial operations.
