6. Function blocks
6.3 UF - User function block
Menu option Program/ Configure user function block
Fig. 272: Configure user function block
Firmware version or higher
You can use this drop-down menu to specify the minimum firmware version for using
the user function block. The function blocks and language elements available for the
selected firmware version will be available.
Please note that, after selecting a firmware version, you will not be able
to change it back to the older version.
Interface section
You can use the options in this dialog box to define the number of digital and analog
inputs and outputs for your user function block. These inputs and outputs will then
form the interface between the user function block and the main program. You can
configure a maximum of 12 digital bit inputs/outputs and a maximum of 8 analog input-
s/outputs. Please note, however, that the total number of all inputs and outputs can-
not exceed 12.
When the user function block is called in the main program, the inputs and outputs
defined in the Interface section will be shown and you will be able to configure them.
Read from program
If the program for the user function block has already been written and it uses inputs
and outputs, you can click on the Read from program button to have the system auto-
matically determine the interface parameters. The highest input/output index used
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