Process Image; Local Process Image - WAGO 750-370 Manual

72 • PROFINET IO 750-370

Process Image

3.1.5 Process Image
3.1.5.1

Local Process Image

After being switched on, the coupler identifies all I/O modules connected that
supply or receive process data (data width or bit width > 0).
Note
For the number of input and output bits or bytes of the individual I/O
modules please refer to the corresponding description of the I/O modules.
The fieldbus coupler allocates the user data of the connected I/O modules
according to specified rules to the local input and output image. The allocation
is carried out according to the slots. Digital I/O modules with a data width less
than 8 bits are always opened with one bit in the respective process image
area.
After a successful configuration test while establishing the connection, if there
is any difference between the user configuration and the process image
generated during start up, a new process image is created according to the user
configuration. One of the reasons for this may be the packing of digital I/O
modules or the lack of configuration modules for the connected I/O modules
during configuration.
WAGO-I/O-SYSTEM 750
PROFINET IO