3BHS135824 ZAB E01Rev. D 43 (of 62)
7.2.2 Advant Bus Communication
If an ABB Advant controller (e.g. AC80, FCI, NPBA-02, NCSA-01) is
part of the converter parameter 75.1 Comm Module is set to 4 (DSET
10 R/W ) or 5 (ReadOnly mode for DS10). In this case, dataset
communication groups 92 – 95 will be opened in the signal and
parameter table.
7.2.3 AC 80 Communication
Th AC 80 controller connected to channel 4 is activated with parameter
75.2 AC80 Advant Controller. Parameter groups 60 – 63 define the
dataset communication. Refer also to the AC 80 documentation if this
option is used.
Check that parameter 16.7 Comm.module control place is set to
channel 4 if the AC 80 controls (on/off, start/stop, n ref) the converter.
Check that parameter 70.17 CH4 Baud Rate is set to 4 Mbit/s.
7.2.4 DDCS Communication
Settings regarding node address and link control of channel 4 are made
in parameter group 70.
Check that parameter 70.3 CH0 Baud Rate is set to 4 Mbit/s.
7.3 Limiting Parameters
7.3.1 Dynamic Torque Limiters and VLU/RBU Settings
There are three dynamic torque limiters. They are able to change (limit)
torque reference in order to prevent overvoltage, undervoltage or too
high angular frequency. The dynamic limiters are located after the
static limiters. In principle they are P-controllers with a threshold level
and gain as parameters.
See section 6 of the ACS 6000AD Torque Control SW (TC SW) TC SW
Commissioning manual
VLU/RBU (Voltage Limiter Unit / Resistor Braking Unit) thermal model
protects resistors of VLU/RBU against overheating. This task is carried
out by enabling and disabling VLU, which is based on either resistor
temperature model or pre-defined enabling / disabling pulse mode
(control scheme). A separate thermal model / control for both halves of
VLU/RBU (upper and lower) is implemented.
Same SW module also delivers discharging command to VLU/RBU
control logic and takes care of configuring VLU/RBU operation on EPLD
level.
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