老外写的ST语言教程_很详细

REAL
Short Integer
Unsigned Short Integer
Integer
Unsigned Integer
Double Integer
Unsigned Double Integer
Real Number
-128 0 -32768 0 -2^31 0
-10^38
Upper limit
Choosing : - FBD, the application will be 'mixed’, it will consist
of a main with Atoms, Macroblocks ... but you can use routines (functions and function blocks) written in the
2
Requirements
Hardware
The programming language ST is only available for following programmable controllers:
• pCO3 • Supernode • pCO5 • pCO compact
pCO3 Supernode
Note: we can define more functions and function blocks, but only one program main
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The basic types
The following table lists all the properties of basic types (IECType):
ST - ST, the application will be developed entirely using
‘ST language’
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Basic concepts
POU
When programming in ST, the application can be organised using three fundamental programming elements generically called ‘Program Organization Units’ (POU):
Description
Main program that includes: • read/write I/O • definition of local variables • calls to Functions or Function Blocks
ST statements block with input variables, local variables, and if specified a return value. This can be called at different points of the program. Recursion is not allowed.
TRUE (1) 255 65535 4.294.967.2 95 127 255
Memory Space
8 Bit 8 Bit 16 Bit 32 Bit
8 Bit 8 Bit
32767 65535
16 Bit 16 Bit
(2^31)-1
32 Bit
2^32 -1
32 Bit
10^38
32 Bit
Bitstring Integers
Keyword
Data type
Lower limit
BOOL BYTE WORD DWORD
Boolean Bit string Bit string Bit string
FALSE (0) 0 0 0
SINT USINT INT UINT DINT UDINT
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Declaration of Global variables
•There are two ways to declare Global variables:
– ‘Variable List’ – ‘Textual mode’ of ST language
Note: if you want to see the variable in the pGD, please declare the variable in the Variable List
ST statements block with input variables, local variables, and output variables. This can be called at different points of the program. Recursion is not allowed.
• PROGRAM • FUNCTION • FUNCTION BLOCK
POU type
Program
Keyword
PROGRAM main
Function
END_PROGRAM FUNCTION
Function block
END_FUNCTION FUNCTION_BLOCK
END_FUNCTION_BLOCK
pCO5
BIOS
To support ST language, bios version must greater than 5.0
Software
Use a version of 1tool > = 2.1.x
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Creation of a solution ST Language
ST Language
Basic Course
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1
ST Language
•Key word
Basic Course
•If there is any unclear or uncorrected, please feel free to speak out
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Global variables declaration
Variable List
Button ‘User’
n ‘Extend’
‘CarelType ’
‘IECType ’
• Boolean
• BOOL
• Integer/Analog