Hitachi SV.LINK User Manual page 16

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(chapter 5, page 5-8)
Although the parameters are checked at startup, they are not checked for a
duplicate of areas 1 through 4 and transmission/reception areas. The user
should exercise area management so as to avoid area duplication. Also, note
that crossover use of registers is not checked for (the crossover use of
registers means that, if, for instance, a 16-word transmission beginning with
YFC0 is specified, the areas YFC0 through YFFF and Q000 through Q0BF
would be actually transmitted). To prevent unexpected operations, you
should perform setup so as to avoid the crossover use of registers.
I/O data transmission/reception cannot be invoked simply by setting the above
areas. For the transmission/reception of I/O data, it is necessary to complete
word count setup as indicated in item (5), "Transmission/reception word count
setup areas."
(chapter 5, page 5-9)
Although the parameters are checked at startup, they are not checked for a
duplicate of the areas 1 through 4 and write/read areas. The user should
exercise area management so as to avoid area duplication.
Local station and remote station (MELSEC) transmission/reception start
address setup areas must agree in bit/word register. If they do not agree, a
parameter setting error occurs and SV.LINK stops its communications.
(chapter 5, page 5-12)
After necessary communication parameters are set in the BD register, be sure to
start communication by writing a value other than 0 to the setting start flag. If
communication is started with undefined parameter values, a parameter error or
abnormal operation results.
NOTICE
NOTICE
NOTICE
S-13

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