Design nvSRAM into PLC applications
Karthikeyan Mahalingam, Cypress Semiconductor and Immanuel Rathinam, iWave Systems
EETimes 11/17/2010 5:04 PM EST
A Programmable Logic Controller (PLC) is a specialized computing system widely used to control real-time industrial processes and assemblies. The block diagram of a generic PLC is shown in Figure 1.
The PLC scans the states of inputs and controls the states of outputs through a CPU. The user program that has the control logic for CPU is stored in program memory. Examples of inputs are switches, push buttons, and sensors like those used to sense proximity, temperature, pressure, etc. Examples of outputs are relays, valves, solenoid, actuator, motor, fans, alarm, etc. There may also be a communication interface to other terminals in the system.
E-mail This Article | Printer-Friendly Page |
|
iWave Systems Hot IP
Related Articles
New Articles
Most Popular
- System Verilog Assertions Simplified
- System Verilog Macro: A Powerful Feature for Design Verification Projects
- Enhancing VLSI Design Efficiency: Tackling Congestion and Shorts with Practical Approaches and PnR Tool (ICC2)
- Design Rule Checks (DRC) - A Practical View for 28nm Technology
- Dynamic Memory Allocation and Fragmentation in C and C++