
2.CYCLIC TRANSMISSION SPECIFICATION B-64164EN/01
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2.1 COMMON MEMORY AREA 1 CYCLIC TRANSMISSION
Those areas of common memory area 1 that are to be used for data
exchange can be allocated in the PMC E area or R are in direct image.
Related parameters
(1) Pa11: Area 1 address
(2) Pa12: Area 1 size (in words)
(3) Pa30: PMC start address
(4) Pa31: Area 1 start address
(5) Pa32: Allocation size (in words)
PMC area and common memory area 1
If an allocated area includes a mixture of DI and DO areas as shown
below, data exchange is performed by making a distinction between a
DI area and a DO area.
PMC area
Common memory area 1
7 0 15 0
Transmit data from
other nodes
DI Transmit data from
other nodes
DO
Transmit data of the
local node
Transmit data from
other nodes
DI
Transmit data from
other nodes
Transmit data from
other nodes
NOTE
When 0 is set in Pa32 (allocation size ), the data of
common memory area 1 is not exchanged.
Pa30→
Pa32Pa12
Pa31→
Pa11→