BECKHOFF BC3150 - Manual (Page 55)

Safety Instructions
Fieldbus Components 53
TwinCAT PLC error codes
Error type Description
PLC compiler error Maximum number of POUs (...) exceeded
PLC compiler error Out of global data memory ...
Error POUs
For each block one POU (process object unit) is created. 256 blocks are available by default.
If libraries are integrated this value may be insufficient. In this case, the number of POUs should be increased.
To this end, open
the controller settings in the PLC Control under Projects/Options.
Changing these settings will deactivate online changes.