What Is A Wlan - Siemens SIMATIC 277 IWLAN Getting Started

The access points permit a
Mobile Panel to roam from
one access point's wireless
range to that of another
access point.

2.1 What is a WLAN?

Data is transmitted and received by radio waves in WLAN instead of via cables.
Mobile HMI devices such as the Mobile Panel 277 IWLAN conduct wireless
communication with the PLC via the access point, which makes them very fle-
xible to use, e.g. for maintenance and diagnostics.
Minimum configuration
A WLAN configuration comprises the following components, at least, in automa-
tion technology:
• Access point
The access point is the link which connects the wireless HMI device and the
wire-bound network, e.g. Ethernet.
• Configuring PC
Two tasks are performed with the configuring PC in the WLAN:
• You can use it to configure the access point's WLAN parameters.
• You can use WinCC flexible to configure the project for operating and
monitoring and transfer it via WLAN to the Mobile Panel.
• Mobile Panel 277 IWLAN
The Mobile Panel 277 IWLAN is a portable, wireless HMI device on which the
process is displayed and operated. The Mobile Panel 277 IWLAN can be
used to operate and monitor machines and plant control systems directly on-
site with visual contact.
HMI Device Mobile Panel 277 IWLAN
Getting Started, 04/2008, A5E01004533-01
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