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Installation instructions Powador 3200 / 4400 / 5300 / 5500 / 6600_EN
For correct signal transmission, terminating switch “Term
RS485” on the fi rst unit in the chain must be set to
ON
. On the
other inverters in the chain, terminating switch “Term RS485”
must be set to
OFF
(see fi gure 5.10).
This termination does not depend on the manner of cabling that
is used. The switch is found on the board next to the terminal
block (fi gure 5.9).
With a bus system such as RS485, each unit sharing this bus
must possess a unique address, regardless of whether it is an
inverter or a current sensing unit. For inverters, the address
range can be selected between 1 and 32. You can defi ne the
address for each inverter using the confi guration menu (see
Operating Instructions).
IMPORTANT
Ensure that the A and B wires are properly connected.
Communication is not possible if the wires are reversed.
5.5 Limiting during asymmetric feed-in
In order to limit the asymmetry between the phases during
feed-in to the maximum permissible value, the units are
equipped with an additional communication interface. The
feed-in powers of all inverters connected to the grid are
recorded using this interface. From this, the inverters calculate
their maximum permitted feed-in power (taking the maximum
asymmetry into account).
The inverters must be connected to each other via the CAN bus
interface so that they can communicate with one another. You
can use either a patch cable with an RJ45 plug or a two-core
cable that is suited for a fi eld bus to do this. When the two-core
cable is used, terminals CAN H and CAN L are connected to
one another. The inverters are cascaded. On the fi rst and last
inverters (each of which has only one cable attached), terminat-
ing switch “Term CAN” must be set to
ON
.
Terminating switch “Term CAN” must be set to
OFF
on the other
inverters. This termination does not depend on the manner of
cabling that is used. When a patch cable with an RJ45 plug is
used, an RS485 connection, which is required for a proLOG con-
nection, is established at the same time. (Figure 5.10 und 5.11)
Recommendations for the cables used in the CAN bus
connection:
We recommend a standard commercial patch cable (CAT5) for
cable lengths up to 120m. A two-core, twisted, shielded data
cable, which is suited for a fi eld bus, can also be used. Up to
500 m: 0.75 mm
2
cross-section minimum. Correspondingly
larger cross-sections should be used for longer distances.
Figure 5.11:
SYM bus connection diagram
A group of up to a total of 32 inverters can be symmetrised in
this way. All inverters of a group must be assigned a unique
SYM bus address within the range of 1 to 32. In addition, the
feed-in phase into which the inverter feeds must still be entered
into every inverter. The red LED fl ashes until a feed-in phase
has been entered.
The maximum permitted asymmetry must still be entered so
that symmetrisation can take place properly. The value for the
maximum asymmetry is usually the same for all inverters in a
group. Thus, if the maximum permitted asymmetry in the grid
is 4,600 W, that same value (4,600 W) must be entered into
all inverters.
5.6 SYM bus test
The inverters have an integrated SYM bus test to test the wiring
and the software settings of the inverters that are connected
together. This can only be activated if the SYM bus is activated.
In order to begin the SYM bus test, use key “2” to select “
yes
” in
the “SYM bus test active” menu on one inverter. After this, the
displays on all of the inverters in the group show the following:
the feed-in phase that has been set, the number of inverters on
this feed-in phase and the sum of all rated powers of inverters
connected to this feed-in phase. These values make it easy to
check the confi guration.
S e c t i o n 5 ·
I n s t a l l a t i o n a n d S t a r t - U p
