Communication
40
Communication Profiles
Modbus is an application layer messaging protocol. It describes
how data is transferred between client and server, but not the
meaning of that data. Communication profiles are used to define
the meaning of the data.
ABB Drives Profile - Classic
The ABB Drives Profile - Classic communication profile provides
register mapped access to the control, status, reference and
actual values of the ABB Drives Profile in the classic format for
backward compatibility.
* 6-digit register addressing (400001) is used instead of 5-digit
register addressing (40001) to describe register map. See section
Register Addressing on page 37 for additional information.
ABB Drives Profile - Enhanced
The ABB Drives Profile - Enhanced communication profile
provides register mapped access to the control, status, reference
and actual values of the ABB Drives Profile. The mapping of the
registers has been enhanced to allow writing of control and
reading of status in a single Read/Write Multiple Register request.
Register Address* Register Data (16-bit)
400001 ABB Drives Profile Control
400002 ABB Drives Profile Reference 1
400003 ABB Drives Profile Reference 2
400004 ABB Drives Profile Status
400005 ABB Drive Profile Actual 1
400006 ABB Drive Profile Actual 2
400101-409999 Drive Parameter Access (16-bit)
Register Address = 400000 + 100 x Group + Index
Example for Drive Parameter 3.18
400000 + 100 x 3 + 18 = 400318
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