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To avoid confusion, when this user’s manual uses the term “parameter”, it will be
referring to the ASD’s hexadecimal number as documented in the ASD user’s
manual. Similarly, when this user’s manual uses the term “register”, it will be
referring to the decimal number as it is exposed to the network interface.
Note that although 1500 total registers are available in the register space, not all of
those registers have corresponding parameters that exist in the drive. In other
words, if a read from or write to a register that does not correspond to an existing
drive parameter takes place, the read/write will be successful, but the data will have
no meaning. This feature is beneficial in situations where the accessing of non-
contiguous registers can be made more efficient by accessing an all-inclusive block
of registers (some of which correspond to drive parameters and some of which do
not), while only manipulating those in your local programming that are known to exist.
For a complete listing of all available drive parameters, their bit mappings, scaling
values etc., please refer to the Toshiba “TOSVERT VF-AS1 Series RS485
Communication Function Instruction Manual” (Toshiba document #E6581315). As a
user convenience, the structure of the commonly-used “option board command 1”
word (drive parameter FA06 / register 1007) is replicated here (refer to Table 2).
Table 2: Structure of "Command 1" Word (Drive Parameter FA06)