Specifications

2 S7-1200/1500 Innovations

2.7 Block sizes

Programming Guideline for S7-1200/1500

V1.2, Entry ID: 81318674

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2.7 Block sizes

For S7-1200/1500 controllers the maximum size of blocks was significantly

increased in the main memory.

Table 2-7: Block sizes

Max. size and number

(regardless of the main memory

size)

S7 -300/400 S7-1200 S7-1500

Max. size 64 kB 64 kB 64 kB (non-optimized)

16 MB (optimized)

Max. number 16.000 59.999 59.999

FC/FB

Max. size 64 kB 64 kB 512 kB

Max. number 7.999 65.535 65.535

FC / FB / DB

Max. number 4.096 (CPU319)

6.000 (CPU412)

1.024 6.000 (CPU1516)

Recommendation

 Use the DBs for S7-1500 controllers as data container of very large data

volumes.

 Data volumes of > 64 kB can be stored in an optimized DB (max. size 16 MB)

with S7-1500 controllers.

2.8 New data types for S7-1200/1500

S7-1200/1500 controllers support new data types in order to make programming

more convenient. With the new 64 bit data types considerably larger and more

accurate values can be used.

Note

You will find further information in the following entry:

How is the conversion of data types performed in the TIA Portal for the

S7-1200/1500?

http://support.automation.siemens.com/WW/view/en/60546567

2.8.1 Elementary data types

Table 2-8: Integer data types

Type Size Value range

USint 8 bit 0 .. 255

SInt 8 bit -128 .. 127

UInt 16 bit 0 .. 65535

UDInt 32 bit 0 .. 4.3 million

ULInt* 64 bit 0 .. 18.4 billion

LInt* 64 bit -9.2 billion .. 9.2 billion

* only for S7-1500