Siemens SIMATIC ET 200SP Manual page 84

Measured variables
Format
Table B- 2 Format and its length in bytes
Format in STEP 7 (TIA Portal) Format to IEEE
BYTE
WORD
USINT
INT
UINT
UDINT
DINT
REAL
LREAL
84
Length in bytes
BYTE 1 byte
WORD 2 bytes
INT8 (unsigned) 1 byte
INT16 (signed) 2 bytes
INT16 (unsigned) 2 bytes
INT32 (unsigned) 4 bytes
INT32 (signed) 4 bytes
Float32 4 bytes
Float64 8 bytes
Analog input module AI Energy Meter 400VAC ST (6ES7134-6PA01-0BD0)
Comment
Bit field with 8 bit
Bit field with 16 bit
Fixed-point number 8 bits without sign
Fixed-point number 16 bits with sign
Fixed-point number 16 bits without sign
Fixed-point number 32 bits without sign
Fixed-point number, 32 bits with sign
Floating-point number 32 bits with sign
Floating-point number 64 bits with sign
Manual, 10/2017, A5E36061895-AB