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4-3 Section Words Allocated in DM Area
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4-3 Words Allocated in DM Area
4-3-1 Allocated Words
A total of 100 words are allocated from words in the CPU Unit’s DM Area for Spe-
cial I/O Units (D20000 to D29599) according to the unit number (0 to 95) set for
the Customizable Counter Unit using the rotary switches on the front of the Unit.
•
The following table shows the relationship between the unit number setting
and the CPU Unit’s allocations.
Unit number Allocated words
0 D20000 to D20099
1 D20100 to D20199
2 D20200 to D20299
3 D20300 to D20399
4 D20400 to D20499
5 D20500 to D20599
6 D20600 to D20699
7 D20700 to D20799
8 D20800 to D20899
9 D20900 to D20999
10 D21000 to D21099
... ...
n (n
×
100) to (n
×
100) + 99
... ...
95 D29500 to D29599
The allocated words are divided into two areas: The Initial Setting Area (m to
m+9), to which specific functions have been allocated, and general-purpose
words (m+10 to m+99), to which functions have not been allocated.
1, 2, 3... 1. The contents of the Initial Setting Area (m to m+9) are transferred from the
CPU Unit to the Customizable Counter Unit at startup or when the Custo-
mizable Counter Unit is restarted.
2. General-purpose words (m+10 to m+99) can be allocated to user-set words
in the DM, EM, IR, LR, or AR Area in the Customizable Counter Unit. The
contents of general-purpose words are exchanged with the CPU Unit at the
CPU Unit’s I/O refresh (i.e., on the CPU Unit’s timing).