
2.CYCLIC TRANSMISSION SPECIFICATION B-64164EN/01
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2.2.1 Simultaneous DI and DO Area Allocation
Areas of common memory area 2 that are to be used for data exchange
can be allocated to the E, R, or D area of the PMC just as they are
allocated in common memory.
Related parameters
(1) Pa13: Area 2 address
(2) Pa14: Area 2 size (in words)
(3) Pa47: PMC start address
(4) Pa48: Area 2 start address
(5) Pa49: Allocation size (in words)
(6) Pa61: Bit 2 (DTL) of parameter 2 = 0
PMC area and common memory area 2
Even when an allocated area contains both DI and DO areas as
follows, data exchange is performed with the DI and DO areas
distinguished from each other.
PMC area
Common memory
area 2
7 0 15 0
Transmit data
from other nodes
DI Transmit data
from other nodes
Transmit data of
DO 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 Pa49 (allocation size), data
exchange with common memory area 2 is not
performed.
Pa47→
Pa49Pa14
Pa48→
Pa13→