Toshiba BMS-IFMB1280U-E, Installation Manual

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Modbus interface Installation Manual
LINK(Uh)
U2 U1
U4 U3
U2 U1
U4 U3 U4 U3
4
A
B
SG
U4
U3
FG
RS-485
SW6 SW5
SW1
U2 U1 U2 U1
U2 U1
U2 U1
U4 U3
U2 U1
U4 U3 U4 U3
U2 U1
U2 U1 U2 U1
L
N
LINK(Uh)
1
A
B
SG
U4
U3
FG
RS-485
SW6 SW5
SW1
L
N
A
(+) (-)
B
Indoor
unit
Do not connect the shielded wire of
Uh Line communication cable to the
earth.
Pow
er supply
Indoor
unit
Indoor
unit
Indoor
unit
Ind
oor unit
Indoor un
it
Outdoor unit Outdoor unit
Outdoor un
it
Outd
oor
unit
Remote con
trol
ler
Remote co
ntroller
Re
m
ot
e
contr
oller
Remot
e
controller
Power supply
C
entral
remo
te
con
trol
ler
Centra
l r
emote
controlle
r
LINK(Uh) U3 and
U4 have no polarity.
Set the RS-485 termination resistance on
the address1 unit (Modbus interface
address SW1=1) and host system. Do not
set it here.
Uh Line termination resistance
Refer to "Termination resistance
setting"(P.6)
The shielded wire of the RS-485
communication cable must be earthed
on address 1
CAUTION: RS-485 communication
cables A(+) and B(-) have polarity.
Be careful when connecting the RS-
485 wires.
RS-485 termination resistance is set
by Modbus interface of address
setting switch SW1=1 only.
Set the Modbus interface address with SW1. Assign 1 to
F(15) to each address to avoid duplication.
CAUTION: The SW1 setting is read when the power is
turned on. Push the reset switch SW7 after changing the
address.
Modbus-Master
(Locally procured)
12-EN