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4.1 Configuration of the DN211 Communication Memory
Indicated below is the configuration of the DN211 communication memory seeing from the
T2/T2E /T2N.(Word address)
Semaphore area
305 words
02CEH
02CFH
03FFH
0106H
0107H
0000H
Input/output data area
263 words
RAS information area
456 words
Figure 4.1 DN211 Communication Memory Map
(1) The Semaphore Area
This area is used for issuing requests from the T2/T2E/T2N to operate the DN211 and for reading
the DN211 responses.
(2) The RAS information Area
This area of the DN211 displays the DN211's module status, communication status with network
and slave devices.
(3) The Input/Output Data Area
This area stores data to be exchanged between the DN211 and slave devices.
Output data from the T2/T2E/T2N is written in this area, while input data is read from this area.
This area also have the output and input semaphore registers used for synchronous
communications between the DN211 and slave devices.