How to clear a word\ output card in EchoStruxture\UnityPro

Hi,

I'm wanting to write a rung that clears a whole output card (64 bits 4 words).

I can do it in structured text for each individual bit but wanting to do it in ladder as it'll be a lot shorter.

I've used other Schneider programming software where this is possible (SoMachineBasic) but on these the addresses are predefined for the cards in slots. so to clear a word in this is - %Q0.0:16 := 0
However this isn't the case for EchoStruxture.
I can assign a symbol to each bit but there's no reference to an address.

The card I'm using is a BMXDDO6420K.

Any advice would be appreciated.

Thanks,

Tom