PLC18 Sep 2009 05:19 am
Programmable Logic controller Open standard structure & Data Correction for SCADA
PLCopen standard structure & Data Correction to SCADA system
This is the first in a series of articles focusing on writing code using IEC 61131-3 programming. The first series of articles will focus on information architecture for the standard conventions and data types. Following coverage of these, this series will explore the code written for a scope of different situations.
THE IEC 61131-3 software model
Figure 1
Standard IEC 61131-3 has a hierarchical approach to the programming structure. The software model in Figure 1 shows the schematic of this structure. Analyze this structure from top to bottom. (more…)
Tags: Data Correction, Open standard, PC based, plc, PLC programming, PLCopen, Programmable Logic controller, programming structure, SCADA, structure
