You seem to be asking several questions at once. The title of the question is "Word / Bit level addressing", but your question is a simple ladder diagram:
DI +---- MOV -+
---| |---| value |
| AO |
+----------+
The addresses of DI and AO will depend on how the I/O is being communicated. You can browse to find the address you are interested in, if your I/O tree is set up to communicate to the I/O modules where the points will be landed.
The "value" can be a fixed number (real or integer) or an internal register (N or F data type) as your programming needs require.