Introduction of milling/lathe controller with PLC
Programmable controller referred to PC, it goes through a history from programmable matrix controller(PMC), programmable sequence controller (PSC), programmable logic controller (PLC) to programmable logic controller (PC).To distinguish the personal computer (PC), so it still follow the old name:programmable logic controller(PLC).
PLC is electronic system that base on digital computing, designed for applications under industrial environment. It uses programmable memory for internal storage to execute the commands of logic computing, sequential control, timing, counting and arithmetic operations and so on.And through digital, analog input and output to control all types of machinery or production processes. PLC and related equipment, are designed with two principles:easy to connect with the industrial controller systems, easy to expand the function.
PLC is a kind of micro-processing technology, memory stores process control rules, mainly applied to control switch or including to control logic control with parameter, electromechanical motion control, or process control and new industrial control devices of industrial control field.
1. High reliability, strong anti-interference ability
To limit the occurrence of failure or in case of failure,can quickly find the point of failure and limit faults to expand, PLC manufacturers take various measures from hardware and software to make PC except has strong self-diagnostic capabilities, give error message in time, stop and wait for repair, but also make the PC has strong anti-jamming capability.
2. Versatility, variable control program, simple operation
PLC has full range of a variety of hardware devices that can be composed to meet the various requirements of the control system, users do not have to re-design and manufacture hardware devices. After hardware is determined, in the case of changing the production process or production equipment renewal, without changing the PLC hardware device, simply adapt the program to meet the requirements. Therefore, PLC is applied to not only stand-alone control, also factory automation.
3. Strong function, wide application
Modern PLC not only has logical computing, timing, counting, sequence control and other functions, also has digital and analog input and output, power-driven, communications, interactive, self-checking, record, and other functions. It can control a production machine, a production line, but also the control of a production process.
4. Simple Programming, Easy to acquire
Currently, most PLC use relay control in the form of "ladder programming mode." Not only inherited traditional clear and intuitive control circuit, also take the draw reading habit and programming level into consideration of enterprise's electrical technicians,so it is very easy to accept and master. When PLC execute ladder program,it will translate into assembly language by interpreter to execute (internal PLC add the interpreter). Compared with the direct execution of programs written in assembly language, ladder program execution time is longer, but for most of the mechanical and electrical control equipment, is negligible, fully meet the control requirements.
5.Reducing the workload of the design and construction of the control system
Since PLC uses software to replace a large number of components like intermediate relays, time relays, counters and other devices in relay control system, so the workload of control cabinet design,installation and wiring greatly reduced . Meanwhile, PLC program can be simulated debugged in the laboratory,then reduce the workload of site commissioning. Further, due to the low failure rate and strong monitoring, modular, etc., so maintenance is very convenient.
6.Maintenance workload is small, easy to maintain
PLC failure rate is very low, and there is complete self-diagnostics and display functions. PLC or external input devices and actuators occur fault,can quickly get the cause by light emitting diode on PLC or information provided by programmer,can quickly troubleshoot by module replacement.
ECON lathe/milling controller with PLC apply the 32bit CPU,and use the massive programmable parts FPGA,greatly improve the performance of the controller.And ECON PLC has below features:
●Two levels PLC programming, processing speed is 1.5μs/ step under basic instruction; 4700 steps is the MAX step, the cycle of the first level program is 8ms.
● Support PLC warning and PLC alarm.
● Support multiply PLC programming (Max 20), the current working PLC programming can be chosen too
● Quantity of commands:45 (10 is basic commands, 35 is function commands)
● I/O unit input/output: 36/36
Application and functions of PLC
PLC are widely used in steel, petrochemical, machinery manufacturing, automobile assembly, power, textile, electronic information industry and other industries in the world.Currently typical functions as following:
Sequence control:This is the most widely used field, replacing the traditional relay sequence control, such as injection molding machines, printing machinery, mechanical stapler, paper cutter, the combination of machine tools, grinding machines, assembly lines, packaging production line, plating line and elevator control.
Programmable:During industrial production process, there are many of the continuous changes, such as temperature, pressure, flow, liquid, speed, current and voltage, known as analog. Programmable controller has A / D and D / A converter module, so that the programmable controller can be used as programmed for analog control.
Data processing:General PLC has four instruction,can easily process production data. If use PLC,it can be configured with a monitoring system, to collect data and process、control production process.High level programmable controller has position control module for controlling stepper motors to achieve to control the position of various machinery.
Communication and Networking:Some control systems require more than one PLC connected or a computer with multiple PLC consists of distributed control system. Communication module of PLC meet the demand of communication and networking
Printing:Programmable controller can connect a display terminal and printing peripherals, to achieve display and printing.
Now in CNC machines,electronics industry,ECON lathe/milling controller with PLC is already widely used.For further information,please review our website:www.hybridservo.com or contact our technical engineer.