Bus expansion

Hello,

how do I extend buses in Quartus Schematic Editor? Say, for instance, there is an input "phase_offset[23..0]" and a component which expects a 32-bit wide vector. I would like to map phase_offset to the upper 24 bits of the vector and hardwire the remaining bits to 0. In VHDL it would be:

For non-constant data I have already figured it out:

1. Create a bus using the Orthogonal Bus Tool;
2. Select the bus and then in its properties fill the "name" field with e.g. shifter_out[29..14], phase_out[15..3].

However, it does not work with constants.

My attempt: phase_offset[23..0],0,0,0,0,0,0,0,0 Quartus: Error: Node "0" is missing source

My attempt: phase_offset[23..0],"00000000" Quartus: Error: Illegal wire or bus name phase_offset[23..0],"0000000" of type signal

My attempt: use the megafunction wizard to insert a constant by the name of "Z" and value 0, then write phase_offset[23..0],Z,Z,Z,Z,Z,Z,Z,Z Quartus: Error: Node "Z" is missing source.

So then, how should I express my intentions? :-)

Best regards Piotr Wyderski