schneider变频器及软启动3using ps.pptxVIP

Using PS1131IEC 1131-3 Standard (reminder)IEC 1131-3 StandardChronological events………….. 1979 : The International Electrotechnic comity (IEC) appoint the 65A working group to design a specific PLC standard Object : take charge the increasing complexity of PLC systems and PLC variety which are not always compatible togetherIEC 1131-3 StandardChronological events …………..continued His content :IEC 1131- 1 : General information ( 1992 )IEC 1131- 2 : Equipment specifications and tests ( 1992 )IEC 1131- 3 : Program languages ( 1993 )IEC 1131- 4 : Advices to user IEC 1131- 5 : Specifications for information delivery system (messaging)IEC 1131-3 StandardAdvantages Training cost reduction Program ??portability?? Homogeneous applications: Same program structure, predefined objects… Diversity of standard languages : Each specificity of an application can be programmed using the must adapted language with a good guaranty of final consistencyIEC 1131-3 Standard The different types of languages :IL: Instruction list :……………………………...LD: Ladder logic :…………….FBD: Function plan :………………….IEC 1131-3 Standard The different types of languages ( IEC 6131-3) :SFC: Sequential function chart :...…………………………………………..ST: Structured text :…………………………...CFC: Free graphic function plan :………………...IEC 1131-3 Standard Type of datas REMIND : All the datas must be declared and introduced before use The types of basic datas are : - Booléens : BOOL - Entiers 16 bits : INT - Word ( 16 b ), Double word ( 32 b ) WORD, DWORD - Real ( 32 bits ) REAL - Chain of character STRING - Duration, date TIME, DATE Introduction: - By default or by assignment (:= )IEC 1131-3 Standard Addressing of variables Direct representation from a variable to the physical or logical place of a data (inputs or outputs) First prefix: % I ( Inputs ) % Q ( Outputs ) Second prefix: X or none ( Bit ) B ( Octet ) W ( word 16 bits )