Omron CJ Series Operation Manual page 185

 Compressing the I/O Mapping
Compressing re-allocates all I/O modules in an area as close to the start of the area as possible.
Compressing an area does not change the sequence of the slave devices and/or the I/O modules. It
only removes the unused memory gaps. Compressing can be initiated for each area individually.
In order to compress an area, perform the following sequence.
1
Open the CJ1W-PRM21 Master DTM - Configuration User Interface, and select the Slave Area
tab.
2
Select the Output Allocation tab or the Input Allocation tab, to display the areas to compress.
3
To compress the area, press the Compress button at the bottom.
4
After finalizing the compress action, select the Save button at the lower right corner, to save the
changes made.
Note Compressing an Input/Output area has no effect on the start address of the area.
The figure below, shows the effects on the previous example, after pressing the Compress button in
both Output areas.
 Selecting the I/O Area Start Address
After finalizing the mapping of the I/O modules on to the various I/O areas, the addresses to which
the areas will be mapped in the CPU memory need to be defined. To define the area mapping, per-
form the following settings.
1
For each area, which contains I/O modules, select the CPU memory area.
2
For that area, set the address to which the first location of the Input/Output area will be mapped.
The Input/Output area will occupy the CPU memory area from this start address to ascending
memory locations.
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
5 Operation
5
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