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Industrial Ethernet Wireless LAN RLM Manager, CP 1515 Manager
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The Test Results tab is your primary screen to analyze link test results using
the following indicators:
• Signal to noise radio (SNR)
• Received messages

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The signal to noise ratio (SNR) identifies the communications quality of radio
path between your station and the link test partner. This indicator is updated
dynamically according to the actual status of the radio link.
The color of SNR indicator relates to the following levels of communications
quality.
If the level of SNR is lower than expected the signal level and noise level
indicators may help you investigate the cause:
• A low signal level indicates that the “strength” of the radio signal is fairly
low: i.e. your SIMATIC NET IWL CP1515 Manager station is almost ‘out-
of-range’ of its link test partner.

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• Green Communication quality is “Excellent” or “Good”, no
intervention is required.
• Yellow Communication quality is “Marginal”, no intervention is
required.
• Red Communication quality is “Poor”, intervention required.
(see chapter B Troubleshooting).