Do you know the difference between PLC and IPC?
Dec 11, 2023
PLC
Programmable controller belongs to the computer family, which is specially designed and manufactured for industrial control applications. The early programmable controller is called programmable logic controller, which is used to replace relays to realize logic control. With the progress of technology, the function of this device has gone far beyond the scope of logic control, so it is now commonly called programmable controller, referred to as PC, but to avoid confusion with the abbreviation of personal computer, we still call it PLC.
IPC
IPC, or industrial personal computer, is an enhanced personal computer that can operate reliably in an industrial environment.
There are some differences between industrial computers and PLC
Operation mode:
PLC has a real-time operating system that can continuously monitor input from connected devices and execute decision commands according to the program. PLC's operating system is designed to control tasks, so there is usually no need for antivirus programs or registry cleaners, increasing processing throughput during operations.
Industrial PC can perform the same tasks as PLC, but its operating system enables it to run a variety of applications. Although vulnerable to network attacks, modern antivirus software and firewalls can effectively reduce risk.
Program development and execution methods:
PLC typically uses scan-based program execution, using trapezoidal logic or other proprietary vendor languages.
Industrial PC usually uses event-driven software, uses a general programming language such as C/C++/.NET, runs on Windows or Linux operating systems, and is more popular among developers.
scope of application:
Both the PLC and industrial PC are designed to operate in extreme environments, but the industrial PC is more flexible in installation options because of its compact size. PLC is usually bulky and has limited installation options. Some PLC will also overheat during installation because their heat dissipation is blocked. By contrast,IPC is relatively small and has a variety of installation options, including VESA installation, rack mount, and din rail options. In addition, some industrial PC are equipped with power ignition management, which can be deployed for on-board applications.
Scalability:
Both PLC and industrial PC are equipped with multiple COM ports and other Imax O functions to support communication protocols such as CANbus, Modbus, Profibus, etc. The industrial PC has higher scalability, with built-in expansion slots to support more Icano numbers, and has a variety of interfaces such as COM ports, LAN, USB and HDMI ports.
processing power and storage:
PLC is designed for dedicated functions and is suitable for smaller automation applications. Industrial PC, on the other hand, uses more storage space and complete processors, giving it an advantage when dealing with large automation projects and running compute-intensive applications.
Cost:
The initial cost of PLC is low, so it is suitable for smaller applications, but with the increase of complexity and computation, the cumulative cost may exceed that of IPC.
The initial cost of an IPC is higher, but it is lower when the computing power and scalability need to be upgraded.
How to choose PLC or IPC?
When choosing a programmable controller, PLC is suitable for small automation systems, has strict functional requirements, and performs well in an industrial environment. For complex tasks with high computing and storage requirements, industrial PC has a lower total cost of ownership. Some applications may use both PLC and IPC to balance costs and benefits, depending on what functions need to be implemented during the manufacturing process.
