Module numbering: start from module 0 (non-existing), 1 (half-module), 2 (bottom),... 4(highest)

All channels have unique absId: start from 1 till 46456. Numbering in each module starts at bottom left and first go in z direction: 56 112 3584 ... ... ... 1 57 ...3529

One can use also relative numbering relid[3]: (module number[0...3], iphi[1...64], iz[1...56])

Then TRU channels go 112 per branch, 2 branches per ddl tru channels have absId after readout channels: absId = getTotalNCells() + TRUabsId ; relId for TRU relid: [DDL id=0..13] [x in 2x2 system: 0..7] [z in 2x2 system 0..27]

Mapping is realized with class Mapping and mapping files are stored as MODxRCUy.data