Beckhoff EP3356-0022 Documentation page 97

Variable: Value (Real)
Meaning: Calculated 32-bit fixed point REAL load value with mantissa and exponent in unit [1]
The format matches the REAL format of IEC 61131-3, which in turn is based on the REAL format of IEC 559.
A REAL number (single precision) is defined as follows (See also Beckhoff InfoSys: TwinCAT PLC Control:
standard data types). This 32-bit variable can be linked directly with a FLOAT variable of the PLC according
to IEC61131.
Bit position (from left)
Function
Voltage measurement
The EL/EP3356 can also be used as a 2-channel analog input terminal/box for voltage measurement, see
Notes [} 89].
Fig. 84: Voltage measurement
EP3356-0022
1 8
Sign Exponent
Version: 1.1.0
Commissioning/Configuration
23 (+1 „hidden bit", see
IEC 559)
Mantissa
97