
B-64164EN/01 SPECIFICATION 2.CYCLIC TRANSMISSION
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(3) The CNC monitors the switch flag at all times. When FFh is
written, the node number, DI offset, and data size set in the PMC
D area are taken in as internal information, and the switch flag is
set to 00h. At this time, the CNC once reads DI data according
to the new settings before the switch flag is set to 00h. So, the
user program can read DI data immediately after checking that
the switch flag is set to 00h.
(4) Until FFh is written to the switch flag, the user program can read
the node information of a specified node number and area 2 DI
data from the PMC area.
(5) Until FFh is written to the switch flag, the CNC writes the node
information of a specified node number and area 2 DI data to the
specified area in the PMC area.
PMC D area
7 0
Dxxxx+0 Node number
Dxxxx+2 DI offset
Dxxxx+4 Data size
Dxxxx+6 DO offset
PMC E/R area
Switch flag
Common memory
area 2
15 0
PMC area Transmit data
from other nodes
Transmit data
Information on other
nodes
from other nodes
DI data Transmit data
from other nodes
Transmit data
from other nodes
NOTE
1 When node information or DI data is dynamically
changed for dynamic DI data allocation of common
memory area 2, the DO offset is also changed. To
change only the DI data, carefully change the
setting not to change another value.
Pa43→
Pa44→
Pa42→
Note 2