Devicenet and M memory

I have a 1747-SDN scanner module and a 1746-HSCE high speed counter card in the same rack. If I want to map the Devicenet data to M file memory, would I have to put an offset in to allow for the counter card Mfile usage? The config on the counter card says that it uses 42 words in the M0 range, or am I mis-reading this?
Please see the attached files

The M file address that you will use has the slot in it. You will not be putting the cards in the same slot.