WAGO-I/O-System 750
Function Description
81
750-370 PROFINET IO Fieldbus Coupler
Manual
Version 2.0.0
7.6
Flexible Configuration of Digital I/O Modules
7.6.1
Packaging Information from Digital Input and Output
Modules
Digital input modules and/or digital output modules occupy a data volume of 1 or
2 bits per channel in the process image. Depending on the number of channels, the
scope of the process data of the respective I/O modules ranges from 2 bits to 2
bytes.
Data management of processing systems such as PCs or controllers is normally
byte-, word- or double word-oriented.
To ensure processing on these systems is as efficient as possible, you can flexibly
arrange process data from digital input modules and digital output modules in
byte, word or double word data structures. This can be accomplished by using
corresponding submodule types in the configuration:
•
Submodule types that allocate data
(in byte, word or double word sizes)
•
Submodule types that do not allocate any data
(whose information is classified in previously allocated data ranges)
Submodule types that allocate data
To map process data from digital input and output modules to larger data
structures, you can select submodule types that allocate a corresponding number
of additional bits for each digital I/O module in addition to the data volume of the
physical channels, so that you achieve the required data structure size.
Submodule types for allocation of 8, 16 or 32 bits are available to you.
The name of the allocating submodule types contains the “+” character plus the
remaining available number of bits of the process input and/or output data.
Example:
The “2DE, 2DIA (+14 BIT I/O)” submodule type is suitable for a module
with 2 digital inputs with diagnostics capability and each one bit diagnostic
acknowledgement per channel in the output image, whose data should be
processed with the data of subsequent digital input and/or output modules in
a 16-bit structure in the input and output data area. Up to 14 bits of input
and output information can be allocated with the processed data of the
submodule types described below.
