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455U-D_Radio-Modem_Proﬁ bus

0508

Application Note 455U-D Radio Modem with Profibus

Issue 1.0 – December/06

©ELPRO Technologies Pty Ltd

Page 6 of 6

app_455UD_PROFIBUS_1.0.doc

When testing ensure that the Signal levels are within an acceptable range so that the signals are not

too strong or too weak giving false indications.

Signal Strength levels can be checked whilst testing via the configuration port and using a terminal

package. Serial settings are 9600, 8, N, 1.

Enter in command at&t5 (RSSI Measurement) and monitor the rolling average Signal Detect

specifications for the 455U-D are -120 to -60dBm.

Amendment Register:

Issue No. Date Details of Amendment

1.0 30-11-06 Initial Issue

Adjust Parameters to

values as shown.

Download new

settings to PLC and

restart with modems

connected.

Ensure Cabling

between Profibus

Devices and 455U-D

modems is correct as

per above.

at&t5

Signal Strength Display

This Sample Rolling Average

Min Max Min Max

-109 dBm -099 dBm -113 dBm -075 dBm

RSSI Level

Noise Floor

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 64 65 66

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Elpro Technologies 105U-G Spécifications Page 58