First, let's talk about PLC first
About PLC, don't just see the PLC module, but a variety of PLC modules + host computer channel software to form a well-structured control systemPLC module is composed of microprocessor + memory + firmware + programming to complete the modular function.
The PLC control system solves the following problems:
1. Abundant I/O modules and actuators
Digital inputs, digital outputs, support for wet/dry nodes
Analog inputs, analog outputs, and other types of input and output modules that follow common current and voltage transmission standards
Abundant actuators: not limited to inverters, valves, actuators of various specifications, etc
2. Compatible with various industrial control bus standards
RS232/422/485、Modbus、 Canbus、 Lonworks、Profibus......
3. Support Ethernet
It can form a control system with different topologies through Ethernet as needed.
4. Standardized PLC programming
Ladder diagrams, host computers and other completion methods, standardized programming things, out of the cluttered programming language 5, strong protocol transformation ability
Standard and non-standard protocols are supported through protocol converters or host computer channels
6. Abundant and perfect upper computer control and management channels
The real-time operation system is selected to support real-time databases and multiple hosts, which can further improve stability, security, and reliability through cloudification
Through the configuration mode, all the inputs and control modules of PLC (bus controller, protocol converter) and control modules connected to the system are integrated to form a control system, which can complete messy industrial process control, data analysis, alarm processing, and emergency plan. Through the standard protocol interface, or perhaps the OPC standard interface, the channel can be easily interconnected with the third-party control system, so that the implementation of the project is minimized.
7. System reliability, stability and safety
The hardware and firmware that make up all levels of the PLC are completed in accordance with the requirements of industrial automation standards, which can ensure that the system can be used in high-risk operations such as petrochemicals
Let's talk about microcontrollers
Any function must be completed by assembly language or C language programming, and the appropriate special system for local control involves messy interface types, protocol conversion, messy process control, and multi-system interconnection, and the single-chip microcomputer is powerless. It is not impossible to complete the large-scale industrial automation control system with a single-chip microcomputer, but the input-output ratio is too low, the time is too long, the system is too messy, and the stability, safety and reliability are difficult to ensure, and the system maintainability is poor.
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Xinjie plc programming software XCPPro
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How to adjust the parameters of the inverter starting overload-Xinjie
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The inverter generally acquiesces to the motor overload maintenance based on the motor power. Generally, it is 1.2 times 60 seconds to report the overload problem. The overload factor is not the same for different frequency converters.
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PLC installation precautions - Xinjie
Of course, PLC control is much more reliable than relay control, but if the device does not meet the requirements, it will not work. Therefore, the PLC machine should be installed correctly outside.
(1) Pay attention to the environment of the installation
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Superheat treatment method of Xinjie inverter drive motor
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This MS6 series B3 motor released will ...
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Xinjie launched a new product - I2C intelligent industrial controller
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The operation and use of the physical environment of the inverter - Xinjie
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Normal selection and matching of inverter - Xinjie
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Xinjie inverter control mode
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Introduction to PLC debugging steps - Xinjie
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