10�- COMMUNICATIONS
10.1.- RS-485 COMMUNICATION
The unit can communicate via Modbus (RS-485), as the master, with:
An external meter,
to read the active power of the installation.
The external meter is used in energy management strategies
Automatic
and
Self-consump-
tion
. (See
“7.2.1.- ENERGY MANAGEMENT STRATEGIES”
.)
B(-)
A(+)
GND
RS-485
POWER SUPPLY
INPUTS
A
(+)
B
(-)
GND
RS485
S1
S2
S1
S2 S1
S2
L1
P1
P2
L2
L3
300V ~
Ph-N
Ph-Ph
520V ~
N
V
L3
L2
V
L1
V
P1
P2 P1
P2
I1 I2
OUTPUTS
Rc R2 R1
Tc T2 T1
S0- S0+ S0+
CVM C10
Figure 93: RS-485 connection with an external analyzer�
The
User
tab on the
Display values
screen (
“8.3.3.- USER”
), shows the value read from the
external analyzer.
A Battery Management System (BMS),
built in the battery. (See
“7.1.7.4.- Battery man-
agement with an external BMS”
)
10�1�1�- MODBUS PROTOCOL
The
MODBUS
protocol is an industry communication standard that enables the network
connection of multiple units, where there is a master and multiple slaves. It allows an individual
master-slave dialogue and also enables commands in broadcast format.
Within the
MODBUS
protocol, CirPower Hyb uses the RTU mode (Remote Terminal Unit).
92
CirPower Hyb 4k-48
Instruction Manual
