1. Programming softwareSiemens SIMATIC PLC series offers a variety of programming software, mainly STEP MICRO/DOS and STEP MICRO/WIN;STEP mini standard package STEP7S7 PLC programming language is very rich, includes LAD, and STL, SCL, GRAPH, HIGRAPH, CFC etc. Users can select a language, if required, can also be mixed using several programming languages.2. Program structureProgram structure … Continue reading Siemens programmed software and program structure
Category: plc program
PLC: which hardware and software components
Programmable logic controller consists of CPU, memory, I/O interface circuits, peripheral interface, programming devices, power supplies and other components.
What needs attention in PLC application
1. Work environment(1) temperaturePLC required ambient temperature 0~55oC, installation cannot be placed in the heat element below, should be big enough ventilation space around.(2) climateIn order to ensure the insulation performance of PLC, the relative humidity of air should be less than 85% (no condensation).(3) motionPLC should be away from strong vibration source to prevent … Continue reading What needs attention in PLC application
How to learn PLC ladder diagram programming
Beginners PLC ladder diagram programming, should follow certain rules, and to develop good habits. Following is a brief overview of PLC ladder diagram programming you need to follow the rules.Trapezoidal steps are started in the bus left and finally the right bus (usually saves not painting, painted bus left only). Is a combination of contacts … Continue reading How to learn PLC ladder diagram programming
PLC programming language types
According to programmable applications, programming languages can be used in combination, commonly used programming languages:Ladder diagram programming languageBoolean mnemonic programming language (STL)Function diagram of programming languagesFunction block diagram programming languageStructure statement describes the programming languageLadder diagram and structure statement describes the programming languageFunction diagram and Boolean mnemonic programming languageBoolean mnemonics and structured statement describing programming … Continue reading PLC programming language types
What is a PLC automatic control system
In the 1960 of the 20th century United States introduction of programmable logic controllers (Programmable Logic Controller,PLC) instead of the traditional relay control device since the PLC have been developing rapidly, has been widely used all over the world. Meanwhile, PLC functionality has been improved. With computer technology, signal processing, control network technology and user … Continue reading What is a PLC automatic control system
What sources of electromagnetic interference in PLC control system
One, from space radiation interferenceSpace radiation electromagnetic (EMI) consists mainly of electrical equipment for power network, transients, lightning, radio, television, radar, high-frequency induction heating equipment, often referred to as radiation interference, its distribution is extremely complex. PLC systems in the RF field, it ***** to radiation interference, its influence through two paths; one is directly … Continue reading What sources of electromagnetic interference in PLC control system
Composition of the PLC configuration, CPU, I/O modules, power modules
Composition of the PLCIn terms of structure, PLC is divided into fixed and modular (modular) two. Fixed type PLC including the CPU board, I/O Board, display panel, a block of memory, power supply, these elements combine into a whole that is not removable. Modular PLC including CPU module, I/O modules, memory, power supply module, backplane, … Continue reading Composition of the PLC configuration, CPU, I/O modules, power modules
PLC program debugging
After the PLC program debugging through can only to users, or try to run. Field debugging to debug outline prepared in advance. According to the outline, step by step in an orderly manner.When you start debugging, the device may not work, not even charged. Progress step by step power available with debug, boot, loading, running … Continue reading PLC program debugging
Detailed steps for PLC system design and commissioning
(A) analysis of controlled objects control requirements andDetailed analysis of control processes and characteristics about control of interaction between mechanical, electrical, fluid, made the control requires control of PLC control system, identification of programmes, development proposal.(B) determine the input/output devicesAccording to the system requirements, and determine all of the required input devices (such as push … Continue reading Detailed steps for PLC system design and commissioning
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