Moxa IOLOGIK E4200 Bedienungsanleitung Seite 6

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ioLogik Active Ethernet I/O Family User’s Manual Introduction
1-2
ioLogik Active Ethernet Modular I/O System Overview
The ioLogik Active Ethernet modular I/O family of slice-type network I/O products can connect
sensors and on/off devices in any combination and can transfer the captured data or device status
to a host computer via an Ethernet or IP-based network.
ioLogik Active Ethernet modular I/O products consist of two main parts: the network adaptor and
I/O modules. The network adaptor provides system and field power to connected I/O modules. Up
to 16 I/O modules can be connected to one network adaptor.
Network I/O expansion modules up to 16 slots
Adaptor (Up to 256 DIOs or 64 AIOs)
Traditional Remote I/O
Remote Ethernet modular I/O solutions have been on the market for a long time. Traditional
solutions are “passive,” in the sense that I/O devices wait passively to be polled by a host computer.
The response time in this type of setup, however, tends to be on the order of seconds. The
“passive” remote modular I/O structure is inadequate for data acquisition and control systems that
require an efficient, real-time I/O solution with a response time on the order of hundredths of
seconds.
Active Ethernet Modular I/O
Moxa’s Active Ethernet modular I/O solutions were developed specifically to address the
limitations of the traditional passive approach. With the passive approach, the host computer polls
the I/O device over the network for the status of each I/O device. With the active approach, the
Active Ethernet modular I/O product intelligently sends the host computer status information only
when specified events occur. Using push technology, the ioLogik I/O device greatly reduces the
load on the CPU and network resources. Far fewer network packets are required and in general the
packets are smaller in size since I/O information is only sent when needed, and only information
from the specified I/O device is sent.
Moxa’s active I/O messaging system uses TCP or UDP for I/O messaging and supports sending
messages to up to ten host computers simultaneously. In addition to providing intelligent status
reporting, Active Ethernet I/O products are backwards compatible, with all of the functions and
capabilities of traditional passive remote I/O products.
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