Omron CJ1W-PNT21, Инструкции по эксплуатации

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5 Operation
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
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
Auto Addressing
The default allocation of I/O modules, (i.e. I/O modules are mapped in ascending order of IO Device
No. and module selection) uses the concept of Auto Addressing of the CJ1W-PNT21 IO Controller
DTM. Auto Addressing will (re)allocate I/O modules according to the algorithm explained above in
each area.
If a configuration has been selected which is changed later, for example, by adding an I/O module to
one of the IO Devices, the Auto Addressing feature will add that module to the default area between
the already selected modules of that particular slave device.
Precautions for Correct Use Precautions for Correct Use
When an I/O module is added to or deleted from a configuration at a later point in time, Auto
Addressing will cause a change in the addresses of subsequent I/O modules in an Input/Output
area. This will cause I/O data of (a part of the) IO Devices to be re-mapped to different locations
in the CPU memory. In order to avoid unexpected results, the CPU user program may have to be
adapted as well.
Additional Information
• Auto Addressing will not change the allocation of I/O modules to a certain area, i.e. a module
allocated to Input/Output area 2, will not be re-allocated to area 1, if Auto Addressing is
enabled
• Auto Addressing will not change the start address of the areas.
• Auto Addressing is by default enabled, when starting a new project. It is however, disabled for
existing projects to avoid unwanted re-mapping.
 Example
The figure below shows an example of the effects of Auto Addressing on (re)allocation of I/O mod-
ules. In the original I/O configuration on the left, the first slave (OMRON GRT1-PNT) consisted of
one Output modules. In new configuration one I/O module was inserted and subsequent modules
were reallocated in the process.