By parameter
, data sets 24 and 25 can be selected instead of data sets 32
and 33.
The update intervals of the data sets are as follows:
•
Data sets 10…11: 2 ms
•
Data sets 12…13: 4 ms
•
Data sets 14…17: 10 ms
•
Data sets 18…25, 32, 33: 100 ms.
Settings and diagnostics
Parameter groups:
60 DDCS communication (page 405)
and
62 D2D and DDCS receive data (page 430)
.
Events:
7581 DDCS controller comm loss (page 568)
and
.
■
Control of a supply unit (LSU)
General
If the drive has separately-controlled supply and inverter units (also known as
lineside and motor-side converters), the supply unit can be controlled through the
inverter unit. For example, the inverter unit can send a control word and references
to the supply unit, enabling the control of both units from the interfaces of one
control program.
With ACS880 single drives, the two control units are connected at the factory. In
ACS880 multidrives (drive systems with one supply unit and multiple inverter
units), the feature is not typically used.
Communication
The communication between the converters and the drive consists of data sets
of three 16-bit words each. The inverter unit sends a data set to the supply unit,
which returns the next data set to the inverter unit.
The communication uses data sets 10 and 11, updated at 2 ms intervals. Data sets
10 is sent by the inverter unit to the supply unit, while data set 11 is sent by the
supply unit to the inverter unit. The contents of the data sets are freely configurable,
but data set 10 typically contains the control word, while data set 11 returns the
status word.
The basic communication is initialized by parameter
. This will make several
parameters visible (see below).
If the supply unit is regenerative (such as an IGBT supply unit), it is possible to
send a DC voltage and/or reactive power reference to it from inverter parameter
76 Program features
Содержание ACS880 N5700 Series
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