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Advanced Energy
MODBUS OVERVIEW
The AE
75TX and
AE lOOTX inve1ter
can communicate via
Modbus/TCP
or
Modbus/RTU.This chapter
is
written
for PV
installers, electricians,
controls
contractors,
and
Modbus
network programmers.
Modbus Communication Protocol
Modbus is
a serial
communications
protocol
and is the most
commonly used
means
of
monitoring and communicating between devices in the PV industry. The
Modbus
protocol
allows for
communication between
a Modbus
master
device
and multiple
Modbus
slave devices
connected to the
same
network. The physical layer
for
Modbus/TCP is
a CATS
Ethernet
network. Modbus/RTU
uses a
twisted
pair
shielded
conductor
RS-485 network.
NETWORKING USING THE MODBUS OPTION
The
following steps are
required to
set
up
a
Modbus TCP network for
your
AE
inve1ter:
•
Field
installation:
This
step can
be
completed onsite by a
PV installer
or
an
electrician that
does
not have working knowledge
of a Modbus
network
°
Consult the
facility
IT
adtninistrator for network
device
installation
suppo1t
and coordination
0
Install
the
Modbus
network communications
cabling
•
Modbus network
configuration:
This
step can
be
done onsite or
remotely and
should
be completed by the
Modbus
network
programmer
0
Set
the IP
addt·ess assigned
to the inve1ter
and
po1t
502 for Modbus
TCP
°
Configure
the point maps
for
the
slave devices
Modbus TCP Installation
6-6
TO INSTALL THE MODBUS TCP CABLE
ih
DANGER:
Risk of electrical
shock.
High
voltages are
present in
the
inverter cabinet.
Both
AC
and DC disconnects must
be
in
the
OFF position when working on
the
unit.
W
ait
five minutes to discharge
high
voltage before
opening
the
front
panels
of
the
inverter.
Data Monitoring and
Controls
570-1001793-0SB
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