13.3 List of Unit Memories13-1513.3 List of Unit Memories13.3.1 Role of Unit MemoriesUnit memories are arithmetic memories to access the monitor area and configurationinformation area of the unit. Accessing unit memoriesThe marks described in the list of unit memories on the next page indicate the followingcontents.Unit It indicates the unit in the case of the access (read, write) using user programs.1": 1 word, 2W: 2 wordsR It indicates the area that can be read using user programs.W It indicates the area that can be written using user programs.Tool It indicates the area that can be set using the tool software. Reading from unit memories (UM)It is possible to read the areas which are shown with "Available" in the "R" column in thefollowing table using transfer instructions or arithmetic instructions with user programs. Theoperand of an instruction is specified by the combination of the slot number where the slot isinstalled and a unit memory number (UM).Example) Program to read the elapsed value area (UM00110) of the counter CH0 of the multiI/O unit installed in the slot number 1 (S1) to an arbitrary data register (DT100)R0MV.SL S1:UM00110 DT100 Writing to unit memories (UM)• When the mode changes from PROG. to RUN, the configuration information set by the toolsoftware will be stored.• It is possible to write to the areas which are shown with "Available" in the "W" column in thefollowing table using transfer instructions or arithmetic instructions with user programs. Theoperand of an instruction is specified by the combination of the slot number where the slot isinstalled and a unit memory number (UM).• Be sure not to execute writing in the reserved areas for the system.Example) Program to change the elapsed value area (UM00110) of the counter CH0 forexternal input to 100000R0MV.SL K100000 S1:UM00110( )DF