Beckhoff EL6692 Documentation page 119

Commissioning
Fig. 152: Offset specification
Extent of process data
The EL6692 can transport a maximum of 480 bytes in each direction. In each transport direction the data
may consist of a single large process data such as a structure or an array.
Declaration of bit process data
In the IEC61131-PLC a bit process data is only created on a bit address if it was defined "alone".
Fig. 153: Bit value declaration
In Fig. Bit values declaration "bBit 1" and "bBit2" are created as individual bit process data and interpreted as
such in the link dialog of the System Manager. The abBitArray array consisting of 10 bits is created as 10
bytes, since the IEC61131-PLC is unable to handle an array consisting of individual bits.
The same applies to bit variables in structures (in IEC61131-PLC).
EL6692 Version: 3.2 119