2.CYCLIC TRANSMISSION DESCRIPTION B-63434EN/02
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2.5 Data Concurrency
With the FANUC FL-net function, when a ladder program handles
input/output signals, the data concurrency is guaranteed in long-data
(4-byte-data) units and in word-data (2-byte-data) units under the
following constraints.
Data concurrency in long-data (4-byte-data) units
① The allocation start addresses in common memory and in the PMC
area are on 4-byte boundaries.
② The PMC ladder program uses the following instructions in 4-byte
units:
DECB, CODEB, DCNVB, COMPB, DSCHB, XMOVB, ADDB,
SUBB, MULB, DIVB, NUMEB, MOVN, EOR, AND, OR, and
NOT instructions
Data concurrency in word-data (2-byte-data) units
① The allocation start addresses in common memory and in the PMC
area are on 2-byte boundaries.
② The PMC ladder program uses the following instructions in 2-byte
units:
DECB, CODEB, DCNVB, COMPB, DSCHB, XMOVB, ADDB,
SUBB, MULB, DIVB, NUMEB, MOVW, MOVN, EOR, AND,
OR, and NOT instructions
Data concurrency in byte-data (1-byte-data) units
There is no constraint.
The data concurrency is always guaranteed in 1-byte-data units.
NOTE
If the above constraints are not satisfied, the
concurrency of word data cannot be guaranteed.
NOTE
If the above constraints are not satisfied, the
concurrency of long data cannot be guaranteed.