Echelon Neuron - Manual (Page 158)

150 Neuron Linker (NLD) and Neuron Librarian (NLIB) Errors
NLD# Description
516 Statement expansion is not required for this target [NLD#516]
For Series 5000 Chips, you can reduce the size of your code by clearing the
Expand Statements option in the Compiler tab of the NodeBuilder Device
Template Target Properties dialog. To open this dialog, right click the
target device, click Settings on the shortcut menu, then select the Compiler
tab.
When the Expansion Statements option is enabled, all Neuron C
statements in your code are expanded to at least 2 bytes of machine code.