Siemens SIMATIC NET PROFIBUS Owner's Manual page 346

Infrared Link Modul (ILM)
10 Help With Problems During Operation
10.1 Status Displays for Incorrect Operation
10.2 Errors Due to Incorrect Network Configuration
10.2.1 Calculating the Propagation Time on Electric Cables and Fiber-Optic Cables
10.2.2 Delay Time of the PROFIBUS ILM
10.2.3 Delay Time of Further Active PROFIBUS Network Components
10.2.4 Transmission Delay Time TTD
11 Technical Specifications
11.1 Illumination Range
12 Appendix
13 References
Copyright by Siemens
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