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Programming Examples for FPWIN Pro
5.6 Programming Example, FP-FNS Block DeviceNet
After you install the FNS Library, you can start programming.
1. Create the Data Unit Types (DUTs) for inputs and outputs.
2. Create input and output variables of the type of DUT generated in the previous
step in the global variable list.
3. Generate the configuration data table for inputs and outputs by using the function
FNS_InitConfigDataTable (see page 49). Make sure that the size of the
FNS_InitConfigDataTable output variable corresponds to the DUT.
4. Create pointers of the input, output and ConfigDataTable variables and provide
them to the FNS_DeviceNet function block together with the corresponding
variables.
Data Unit Types (DUTs)
In the following picture you can see all possible data types and how the different variables
(16-bit, 32-bit and 64-bit) can be defined.
64-bit variables are declared by creating a two-dimensional array, whereas the second
dimension must have a size of four. The first dimension specifies the number of elements of
this type.
In this programming example both variables, the input and output process data, consist of
three elements: a 16-bit, a 32-bit and a 64-bit variable:
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