SPS is intended to replace the relay in a sequential control group. In addition to programs, this tool can also be controlled and managed by people who have no knowledge of information technology activities in particular.
PLC stands for programmable logic controller, what does the following:
PLC
1.Programmable
demonstrate their capability in terms of memory for programs that have been made to save the slightly different function or benefit.
2.Logic
demonstrate the ability to input in the process of arithmetic and logic (ALU), compares the operation, add, multiply, divide, subtract, denial, AND, OR, and so on.
3.Controller
to produce the ability to control and manage the process for the desired output.
The basic elements of a PLC consists of a power supply, Digital, memory, CPU, input modules, output modules. The following describes each of these elements.
The power supply is usedTo supply all parts of the PLC (CPU, memory, etc.). Most of the work on power 24 VDC or 220 VAC PLC.
Console programming is a programming panel as it RAM (Random Access Memory) used as a semi-permanent memory in a program that was created or modified. programs on the console must be in the form of mnemonics. This unit can be connected directly to the CPU via a cable that can be installed and ekstentionremoved at any time.
The memory is a component for storing the program for the PLC is then expected to function as needed to run a program. The program should be safely stored in such a way that the PLC can access instructions for the commands. They also had to temporarily store data during program implementation.
CPU (Central Processing Unit) is the central processor of data and control for the entire work of the PLC system.'s ProceduralCPU and other international control of all operations, maintain current programs in memory and the management of communication between memory, input-output and CPU through the system bus. CPU is also used for the implementation and transformation of the functions of the program has been determined that you want.
module provides functions for receiving input signals from sensors, devices and signal settings, termination, isolation, and indicator of the input signal status. The signals fromDevices are scanned and sent to the PLC via the interface module in
The output module activates a variety of devices such as hydraulic actuators, pneumatic valves, starters, and show the status of peripheral points of the system are connected. Other features include air conditioning module output signals, termination and also exist in isolation. Activation occurs in nature by sending discrete and analog signals relevantBased on his character, the PLC digital device.
Example of process automation with PLC PLC
Programmable Logic Controller or PLCplc-xu4000