In EcoStruxure Machine Expert - Safety, the following IEC 61131-3 defined elementary data types and special safety-related data types are available:
IEC 61131-3 data types
|
Data type |
Description |
Size/Bit |
Range |
Default initial value |
|
BOOL |
Boolean |
1 |
0...1 |
BOOL#0 |
|
INT |
Integer |
16 |
-32,768 up to 32,767 |
INT#0 |
|
DINT |
Double Integer |
32 |
-2,147,483,648 up to 2,147,483,647 |
DINT#0 |
|
TIME |
Duration |
32 |
0 up to 2,147,483,647ms |
TIME#0s |
|
BYTE |
Bit string of length 8 |
8 |
0...255 (16#00...16#FF) |
BYTE#0 |
|
WORD |
Bit string of length 16 |
16 |
0...65,535 (16#00...16#FFFF) |
WORD#0 |
|
DWORD |
Double Word Bit string of length 32 |
32 |
0...4,294,967,295 (16#00....16#FFFFFFFF) |
DWORD#0 |
Safety- related data types
|
Data type |
Description |
Size/Bit |
Range |
Default initial value |
|
SAFEBOOL |
Safety-related Boolean |
1 |
0...1 |
SAFEBOOL#0 |
|
SAFEINT |
Safety-related Integer |
16 |
-32,768 up to 32,767 |
SAFEINT#0 |
|
SAFEDINT |
Safety-related Double Integer |
32 |
-2,147,483,648 up to 2,147,483,647 |
SAFEDINT#0 |
|
SAFETIME |
Safety-related duration |
32 |
0 up to 2,147,483,647ms |
SAFETIME#0s |
|
SAFEBYTE |
Safety-related bit string of length 8 |
8 |
0...255 (16#00...16#FF) |
SAFEBYTE#0 |
|
SAFEWORD |
Safety-related bit string of length 16 |
16 |
0...65,535 (16#00...16#FFFF) |
SAFEWORD#0 |
|
SAFEDWORD |
Safety-related Double Word Bit string of length 32 |
32 |
0...4,294,967,295 (16#00....16#FFFFFFFF) |
SAFEDWORD#0 |
NOTE:
Term definition: Standard = non-safety-related
The term "standard" always refers to non-safety-related items. Examples: a standard process data item is only read/written by a non-safety-related I/O device (i.e., a standard device). Standard variables/functions/FBs are non-safety-related data. The term "standard controller" designates the non-safety-related controller.
Generic data types are used to group elementary data types by forming a hierarchical structure. The generic data type ANY_SAFEBIT, for example, includes the elementary data types SAFEDWORD, SAFEWORD, SAFEBYTE and SAFEBOOL. If a formal parameter can be connected to ANY_SAFEBIT, this means that variables of the data types SAFEDWORD, SAFEWORD, SAFEBYTE and SAFEBOOL can be applied to it.
In EcoStruxure Machine Expert - Safety, generic data types and safety-related generic data types are structured as follows:
ANY_(SAFE)ELEMENTARY
ANY_(SAFE)NUM
ANY_(SAFE)INT
(SAFE)INT, (SAFE)DINT
ANY_(SAFE)BIT
(SAFE)DWORD, (SAFE)WORD, (SAFE)BYTE, (SAFE)BOOL
(SAFE)TIME
NOTE:
Data types which cannot be used for safety reasons, such as REAL or LREAL, etc., are not considered in the listing above.
NOTE:
The use of data types depends on your hardware. Please refer to your hardware documentation for restrictions concerning generic data types.
