IEC 61131-3

The standard IEC 61131-3 is an international standard for programming languages of Programmable Logic Controllers. The programming languages offered in TwinCAT PLC Control conform to the requirements of the standard. According to this standard, a program consists of the following elements:

• Structures
• POUs
• Global Variables

Literature related to IEC 61131-3:

• Flavio Bonifatti et al.: IEC 1131-3 Programming Methology, Seyssins: CJ International, 1997. ISBN 2-9511585-0-5
• Karl-Heinz John, Michael Tiegelkamp: Iec 61131-3 Programming Industrial Automation Systems, Berlin: Springer-Verlag, 2001. ISBN 3-540677526
• R. W. Lewis: Programming industrial control systems using IEC 1131-3, London: IEC Publishing, 1998. ISBN 0 85296 950 3