Moxa IOLOGIK W5340-T Bedienungsanleitung Seite 8

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ioLogik Cellular Micro RTU Controller Introduction
1-3
Unlike the static IP requirements of remote devices for Ethernet I/O with a traditional OPC server, Active OPC
Server and ioLogik products deliver the flexibility of using dynamic IP addresses. The ioLogik can connect
directly to the Active OPC Server instead of being polled, which makes dynamic IP configuration and WAN
Access of the cellular I/O possible. As far as traditional data acquisition applications are concerned, I/O devices
are not capable of using this approach. In addition, the flexibility of being able to connect through a firewall is
a useful feature.
Resolving the Dynamic and Private IP Issue with Active OPC
Server
Since Moxa’s Active OPC Server supports push technology, the Active Cellular Micro Controller family of
products creates a software-based gateway that makes communications easier. By using a static IP address
with the Active OPC Server, the Cellular I/O device can connect to the Cellular network and Active OPC Server
without needing to worry about the IP address issue. The topology is illustrated below:
The ioLogik W5300 is likely to get a different IP address from the carrier each time it is connected to a cellular
network. Active OPC Server plays the role of a cellular gateway by managing the ioLogik W5300’s IP. All remote
ioLogik W5300 devices automatically initiate communication with Active OPC Server regardless of whether
they use a public IP or private IP, and can be managed by one centralized Active OPC Server, which itself has
a static IP address. Therefore, all I/O data can be read or written through one, powerful cellular device gateway
for IP address management.
The ioLogik W5300 allows you to use a variety of methods to connect with your application software, including
Modbus protocol, OPC Client/Server protocol, and SNMP protocol, and you can send alarms by TCP/UDP, SMS,
and email. For example, if you are using a SCADA application to monitor your system, you can use OPC
Client/Server protocol.
Internet
GPRS/EDGE/3G/
HSDPA
Network
Active OPC Server
with Fixed IP
Host
Actively Registering with an Active OPC Server
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