Advantech APAX-5070, Руководство пользователя

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APAX-5070 User Manual 2
1.1 Introduction
APAX-5070 module is a compact Modbus/TCP coupler. Modbus/TCP protocol is very
popular in industrial automation applications. APAX-5070 can recognize connected
APAX-5000 I/O modules, and perform as a communication interface between those I/
O modules and remote devices by Modbus/TCP protocol.
In other words, APAX-5070 is Modbus/TCP server, offering APAX-5000 I/O modules'
data to remote Modbus/TCP client device like PC, PLC or controllers.
There are maximum 32 APAX-5000 I/O modules which can be recognized by one
APAX-5070 coupler module. All APAX-5000 I/O modules' input and output data will
be allocated to the Modbus address, and user can choose default assignment or
manually assigned through Advantech APAX utility or user's programs. Then user's
application programs or HMI software, which supports Modbus/TCP protocol, can
monitor and control these APAX-5000 I/O modules remotely. Refer to APAX-5070
Software Manual for how to assign I/O data to Modbus address in APAX utility.
1.2 System Architecture
APAX-5070 needs to be inserted on APAX-5002 backplane to get power. By assem-
bling with other APAX-5000 I/O modules on APAX-5002 backplanes, APAX-5070 can
communicate with other APAX-5000 I/O modules through the backplanes. Refer to
Section 3.1 for the assembly operation.
APAX-5070 is equipped with 2 RJ-45 LAN ports, sharing the same IP address with a
built-in Ethernet switch. This makes APAX-5070 able to build a line or star topology.
Using line topology, It can significantly save system wiring and cabling cost in many
industrial automation applications. Refer to figure below.
Figure 1.1 Line Topology for APAX-5070
Note! When you use line topology, if one APAX-5070 loses power, the con-
nection to the following APAX-5070 will be disconnected. If you want to
prevent from it, you can choose star topology.