
2.CYCLIC TRANSMISSION SPECIFICATION B-64164EN/01
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(3) The CNC monitors the switch flag at all times. When FFh is
written, the node number 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 updates the specified node status information
according to the new settings before the switch flag is set to 00h.
So, the user program can read the status information 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 from the PMC
area.
(5) Until FFh is written to the switch flag, the CNC writes the node
information of a specified node number to the specified area in
the PMC area. The DI data can be read regardless of whether
the switch flag is set to 00h.
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 of
the local node
Transmit data
from other nodes
Pa43→
Pa44→
Pa42→
Note 3
Pa45→
Pa46
Pa40→
Pa41