ABB PVI-3.0-TL-OUTD-S-US, Product Manual

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3007CC3
3 - Mounting and wiring
The recommended length of total communication cable line for all inverters in the system is
1,000 meters [1094 yards] or less, and this distance capability depends strongly on the cable
type used and installation workmanship.
Depending on the type of computer used, the cable line adaptor can be RS-485 to RS232
or RS-485 to USB. In order to ensure optimum communication on the RS-485 line, it is
recommended to connect the RS-485 converter to a location between the first unit in the
daisy chain or multi-unit system configuration and the computer; not in between two inverters
in the series.
Using the appropriate cable, daisy chain the inverter units RS-485 lines in a series. On the
last inverter in a daisy chain, or on a single inverter, activate the termination resistance for the
communication line by moving the S2 switch (item T i n table 3-3) down into the ON position.
All other inverters in the daisy chain will have the S2 switch placed up in the OFF position.
A
ddressing each inverter
When multiple inverters are connected on a single RS-485 bus, it is necessary to assign a
different RS-485 address to each unit. The address on the inverter is set through the user
interface on the display panel. Refer to the Settings menu in section 4.
Address values are assigned manually using any value in the range 2 to 63. Set a different
RS-485 address for each inverter of the chain. The default setting for the RS-485 address is
2, and termination switch S2 in the OFF position.
NOTE: No more than 63 inverters can be connected on a single RS-485 link. The
number may be less depending on the data logger used. Do NOT to exceed a
length of 3,300 ft/1000m for the RS-485 communication line.
S2=OFF S2=OFF S2=ON
DAISY CHAIN CONNECTION