Siemens SIMATIC NET PROFIBUS Owner's Manual page 371

6ZB5530–3AC30–0BA1
transmission errors.
The red "LOW" LED should only be lit when the level on the infrared link is close to the minimum receive
level (operation at the edge of the illumination cone).
3
Check the data exchange for incorrect data using SCOPE for PROFIBUS (TMG i-tec), a tool for
diagnostics on PROFIBUS networks.
29
Infrared Link Modul (ILM)
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