Download CJ-series PROFINET I/O Controller Unit Operation Manual for

5 Operation
 Example
The figure below shows the CJ1W-PNT1 IO Controller DTM’s IO Device Area sub item for an example network with 4 IO Devices.
5-3 Configuring the IO Controller
By default all Output data is mapped to Output Area 1 and all Input data is mapped to Input Area 1.
Each of these Areas can be mapped to CPU memory independently of each other.
Note 1 By default the Auto-Addressing option will be enabled (see the section IO Controller Setup). If
any I/O modules are moved from one area to another, the I/O modules in first Area are remapped to close all the gaps between mappings.
2 Prior to download, the CJ1W-PNT21 IO Controller DTM will check the mappings for possible
Area overlaps, CPU memory overlaps and non-existing EM banks. If an error is detected,
download will be aborted and the necessary correction must be made first.
Precautions for Correct Use
When mapping the I/O Areas, make sure that the I/O data will not overlap the Unit’s own internal
memory area or one or more of the I/O data areas of any other CPU or I/O Unit. The CJ1WPNT21 IO Controller DTM does not check this. Failure to avoid this will lead to unpredictable
behavior of the Unit, other units, or the CPU Unit.
5-3-5
Mapping I/O Data
 I/O Mapping Concept
The CJ1W-PNT21 IO Controller Unit provides an I/O mapping concept, based on the I/O module
selection for each slave device. Each selected I/O module can, depending on whether it defines
input and/or output data, be mapped to one of two input and/or output areas. Each of the two input
and output areas can be mapped to any CPU memory area location independent of each other. The
I/O mapping must be setup using the CJ1W-PNT21 IO Controller DTM, as provided with CX-ConfiguratorFDT.
Mapping the I/O modules involves two steps:
1
Allocate each I/O module to one or more of the Input/Output areas.
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
5-13
5-3-5 Mapping I/O Data
Changing the mapping can be achieved using drag & drop. The module which is mapped to Area 1 and
which must be mapped to Area 2 can be copied by dragging it from the overall module list on top to
Area 2.
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