PVI 23TL, 28TL Installation and Operation Manual (Rev J)
DOCR-070365-J
Page
36
of
66
4.
If the inverter is the
last
Modbus device in the daisy chain, make sure the Modbus termination
switch S402 is in the ON position (Up towards the LCD) enabling Modbus termination. Do
not
turn
the switch to the ON position in any other inverters in the daisy chain.
S402 - Selector
switch for the 120Ω
RS-485 termination
resistor
1 - Disable the
Modbus (RS-485) bus
termination. (Factory
default)
2 - Enable the Modbus
(RS-485) bus
termination (Applies
only for the last
inverter in the daisy
chain)
Note that switch
S403 to the left of
S402 not used and
stays in the OFF
position.
Figure 7.4 - The Modbus (RS485) Termination Switch (S402) Location and Settings on the
LCD/Communication Board.
