Specifications

4 Hardware-Independent Programming
4.1 Data types of S7-300/400 and S7-1200/1500
Programming Guideline for S7-1200/1500
V1.2, Entry ID: 81318674
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4 Hardware-Independent Programming
To make sure that a block can be used on all controllers without any further
adjustments, it is important not use hardware-dependent functions and properties.
4.1 Data types of S7-300/400 and S7-1200/1500
Below is a list of all elementary data types and data groups.
Recommendation
 Only use the data types that are supported by the controllers on which the
program is to run.
Table 4-1: Elementary data types correspond to standard EN 61131-3
Description S7 -
300/400
S7-1200 S7-1500
Bit data types
 BOOL
 BYTE
 WORD
 DWORD
  
 LWORD
  
Character type
 CHAR (8 bit)
  
Numerical data
types
 INT (16 bit)
 DINT (32 bit)
 REAL (32 bit)
  
 SINT (8 bit)
 USINT (8 bit)
 UINT (16 bit)
 UDINT (32 bit)
 LREAL (64 bit)
  
 LINT (64 bit)
 ULINT (64 bit)
  
Time types
 TIME
 DATE
 TIME_OF_DAY
  
 S5TIME
  
 LTIME
 L_TIME_OF_DAY
  
Table 4-2: Data groups that are made up of other data types
Description S7 -
300/400
S7-1200 S7-1500
Time types
 DT
(DATE_AND_TIME)
  
 DTL
  