Siemens Programming Addressing concept

Siemens Addressing Concept

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Addressing concept of siemens PLC : Byte .Bit addressing

Hardware Bit Addressing:

Input Address:

% I: 0.0 -------% PREFIX : BYTE.BIT

Output Address:

% O: 0.0 -------% PREFIX : BYTE.BIT

Memory Addressing:

Bit Memory Address:

% M 0.0 -------% PREFIX : BYTE.BIT

Byte Memory Address:

% MB0 -------% PREFIX : BYTE 

Word Memory Address:

% MW0 -------% PREFIX : WORD

Doubleword Memory Address:

% MD0 -------% PREFIX : DWORD

ADDRESSING:

1BIT=4NIBBLE

8BIT=2NIBBLE=1BYTE

16BIT=4NIBBLE=2BYTE=1WORD

32BIT=8NIBBLE=4BYTE=2WORD=1DOUBLEWORD

Timer Addressing:

Define Address:

% T:0 -------% PREFIX : NUMBER

Counter Addressing:

Define Address:

% C:0 -------% PREFIX : NUMBER