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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
8.8.3
Precautions during extension file register readlwrite
( 1 )
The extension file register is not used by A1 and A1 NCPU.
This function is not available during communications between A1 or
A1 NCPU and the PC CPU.
(2)
Some types of memory cassette loaded to the PC CPU are unable to
detect an error (character area error 06H) if an attempt is made to read
or write after specifying a block number which does not exist. In this
case, data which is read may not be correct and writing such incorrect
data may destroy the PC CPU user memory.
Always check the type of memory cassette and the parameter settings
before using this function
\
I
Block Numbers Which do not Cause a Character Area Error (06H)
A3NMCA-12
I
No. l o , No. I I
of Memory
AOJ2H, A2, A3CPU
A3NMCA-18
I
-
I
No. 10 lo No.
28
Caaaenc
\ 1
A3ACPU
AZNCPU,
A3NCPU
The UTLP-FN1 Operating Manual or the A2A(Sl)/A3ACPU User's Manual
give details.
A3H, A2A
(SI)
A3NMCA-24
A3NMCA-40
-
No. 13 to No. 20
NO. 13 to No. 28
-
No. 21 to No. 28
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