BECKHOFF DK9222-1109-0015 - Manual

I/O
Wireless Automation
Application Note DK9222-1109-0015
Keywords
Wireless
Radio
WLAN
Coexistence
Antenna
KM6551
CU8890
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Industrial wireless at the field level
Tips for the commissioning of industrial wireless networks are described in this application example.
Through the use of radio technology in automation technology, the installation effort and the costs can
be minimised in accordance with the plant performance. The first part describes all of the necessities for
an error-free radio link, while typical installation errors and their rectification are described in the second
part.
1. Wireless I/O-integrated: KM6551 data exchange terminal and CU8890 WLAN controller
Wireless​solutions​are​the​first​choice​in​rough​terrain​and​also​in​the​case​of​moving​components,​in​order​to​avoid​expensive​
installations​and​intensive​maintenance​costs​and​at​the​same​time​to​achieve​ideal​plant​performance.​Beckhoff​offers​I/
O‑integrated​products​here​on​the​basis​of​standardised​basic​technology:​
The​KM6551​data​exchange​terminal​for​the​Beckhoff​Bus​Terminal​system​uses​the​IEEE​802.15.4​with​16​independent​
channels​in​combination​with​the​robust​DSSS​method.​DSSS​stands​for​Direct​Sequence​Spread​Spectrum​and,​as​a​frequency​
spreading​method,​offers​good​physical​conditions​for​wireless​data​transmission.​A​proprietary,​fast​protocol​based​on​
IEEE​802.15.4​(2.4​GHz​band)​and​DSSS​and​adapted​for​automation​technology​was​developed​for​the​KM6551,​so​that​
communication​is​only​possible​between​KM6551​terminals,​but​the​worldwide​use​of​this​technology​is​assured.​Status​and​
data​exchange​are​displayed​directly​by​LEDs​and​offer​fast​and​simple​diagnostics.​A​library​is​available​for​the​use​of​the​
KM6551​module​with​TwinCAT.​The​industrial​CU8890​WLAN​controller​supports​WLAN​based​on​the​IEEE​802.11​b/g​standard​
and​is​designed​for​control​cabinet​installation.​When​connected​to​a​Beckhoff​Industrial​PC,​the​module​can​be​used​both​as​
an​access​point​and​as​a​client​and​thus​enables​access​to​available​infrastructures.​A​USB​port​is​required​on​the​Industrial​PC​
for​connection.​Eleven​channels​in​the​2.4 GHz band​are​available​for​selection.​Status​and​data​transmission​are​displayed​by​
LEDs​and​offer​fast​and​simple​diagnostics.​A​comprehensive​range​of​cable​and​antenna​accessories​is​available​for​both​the​
KM6551​and​the​CU8890.
New Automation Technology Beckhoff 1
For​application​notes​see​disclaimer​on​the​last​page