RMBA-01 User
’
s manual
5-1
Chapter 5
–
Communication
Register read and
write
The drive parameter and data set information is
mapped into a 4xxxx register area. This holding register
area can be read from an external device, and an
external device can modify the register values by writing
to them.
There are no setup parameters for mapping the data to
the 4xxxx register. The mapping is pre-defined and
corresponds directly to the drive parameter grouping
which is being used by the local drive panel.
All parameters are available for both reading and
writing. The parameter writes are verified for correct
value, and for valid register addresses. Some
parameters never allow writing (e.g. actual values),
some parameters allow writing only when the drive is
stopped (e.g. setup variables), and some can be
modified at any time (e.g. actual reference values).
Register mapping
The drive parameters are mapped to the 4xxxx area
such that:
•
40001
–
40096 are reserved for data sets.
•
40101
–
49999 are reserved for parameters.
In this mapping, the thousands and hundreds
correspond to the group number, while the tens and
ones correspond to the parameter number within a
group. Register addresses 4GGPP are shown in
Table
5-1
Parameter mapping
. In this table GG is the group
number, and PP is the parameter number within the
group.
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