Via "Client" -> "Administration" -> "System settings" -> "Process values" -> "Module settings" you can reach the form seen below. The idea behind this form is that it will determine when/where process values are written when special functions from the tab "Miscellaneous" are used. Each special funtion has separate documentation.
In this form select the machine the process value should be activated on. Then select the special function. Finally, it is the fields for "Parameter Name", and "Parameter Value" that determine when/where the actual transfer happens.