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Router mode for BCU control unit
The BCU control unit of an inverter unit can be set to a “router mode” to allow the
control of locally-connected power units (for example, inverter modules) by another
BCU. Using the router mode and some hardware switching, it is possible to have
the same modules alternate between inverter and, for example, IGBT supply use.
The router mode involves connecting the two BCUs together by their PSL2 channels.
When router mode is active, the channels coming from the other BCU are forwarded
to the local modules.
The diagrams below show how the control of four converter modules can be
switched between two BCUs.
Note: For an example of how to switch converter modules between inverter and
IGBT supply use, see the
ACS880 IGBT supply control program firmware manual
(3AUA0000131562 [English]).
BCU 1 controlling all modules, BCU 2 in router mode
BCU 1
95.14
= 000Fh (1111b)
95.16
=
Off
BCU 2
95.16
=
On
95.17
= 1100b
CH1 CH2 CH3 CH4 CH1 CH2 CH3 CH4
Module 1
Module 2
Module 3 Module 4
BCU 2 controlling all modules, BCU 1 in router mode
Program features 127
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