Register Read And Write - ABB NMBP-01 Installation And Startup Manual

Chapter 6 – Communication

Register Read and Write

The ACS 600 has all the drive parameter and data set information 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 writ-
ing 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 control 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 writes (including actual values), some parameters
allow write only when the drive is stopped (including setup variables), and
some can be modified at any time (including actual reference values).
Register Mapping The drive parameters are mapped to the 4xxxx area so that:
• 40001 – 40099 are reserved for data sets
• 40101 – 40199 are reserved for the actual values
• 40201 – 40299 are reserved for group 2
• ...
• 49901 – 49999 are reserved for the start-up data.
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.
Installation and Start-up Guide for NMBP-01 6-3