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Function (continued)

Industrial Wireless Communication

IWLAN – Access Points IEEE 802.11n

Overview

iFeatures (only in conjunction with KEY-PLUG)

iPCF (industrial Point Coordination Function):

The iPCF mode is a good choice for applications with require-

ments for real-time and predictable response times (determinis-

tic response), even when mobile nodes are roaming from one

access point to the next. This ensures that wireless PROFINET

IO is supported and that safety-related signals, e.g. emergency

stop, can be linked into the RF field. This means that even video

signals from mobile nodes can be transmitted with a high level

of quality. The iPCF mechanism expands the IEEE 802.11

standard and must be available on both the client module

and the access point. In an RF field in which iPCF is used, no

IEEE 802.11-compliant nodes can be operated.

iPCF is recommended for applications where wireless network

nodes move along predefined paths (e.g. suspended monorail).

RCoax radiating cables or directional antennas must be used for

this purpose.

iPCF-MC (iPCF Management Channel)

iPCF-MC is available as a further development of iPCF.

This mode should be used if IWLAN stations that also support

iPCF-MC move freely about in the coverage area (especially

when using omni-directional antennas) and are to exchange

data deterministically. This functionality can only be achieved in

connection with access points with two wireless interfaces and

the KEY PLUG.

iREF (industrial Range Extension Function):

The range of an individual access point is very important, e.g. for

path-based applications. Using iREF, it is now possible to align

the various antennas of a wireless interface in different direc-

tions. This allows a longer path or a greater area to be covered

using a single access point, which reduces the number of

channels used and the number of access points.

Note:

These iFeatures cannot be used in parallel.

Diagnostics and management

• Web-based (HTTP/HTTPS) management tool for configuration

and diagnostics using a standard browser

• LEDs for signaling operating status and fault/error states

• Signaling of faults by means of SNMP trap or e-mail to a

network management tool

• Configuration and diagnostics using Web based

Management, Command Line Interface, and SNMP. Devices

and networks can be configured using STEP 7 (TIA Portal). For

cyclic monitoring, diagnostics and documentation (reporting)

in network mode, the SINEMA Server software is recom-

mended.

Available soon

Linking in an automated guided vehicle system using iPCF with the SCALANCE W774-1 RJ45 and KEY-PLUG

RCoax Cable Segment 1 RCoax Cable Segment 2

Access Point

SCALANCE

W784-1RR in

the cabinet

Access Point

SCALANCE

W784-1RR in

the cabinet

G_IK10_XX_30172

IWLAN RCoax Cable IWLAN RCoax Cable

Client Module

SCALANCE

W722-1 RJ45

Panel PC

Client Module

SCALANCE

W722-1 RJ45

Panel PC

Client Module

SCALANCE

W722-1 RJ45

Panel PC

WinAC WinACWinAC

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