
B-63434EN/02 DESCRIPTION 2.CYCLIC TRANSMISSION
- 31 -
When handling data input from the FL-net, note the following points:
NOTE
1 When the PMC R area or D area is used as the input
data area, the synchronous buffer in the PMC is not
used. For this reason, input data may change during
ladder 1 scan.
In other words, the value updated via the FL-net may
be read, depending on the read timing, even when the
ladder program handles data in the same area.
2 The concurrency of data longer than long data (4-byte
data) is not guaranteed. To establish the
concurrency of such data, see "Measures to guarantee
the concurrency of multiple-byte data" following.