Siemens OLM settings User Guide. This device can convert cables to optical fibers for communication. This document introduces the function settings of the device, including 485 segment monitoring, optical path monitoring, topology structure, and optical fiber receive port signal detection.
The Siemens OLM (Optical Link Module) is a PROFIBUS network device that converts RS‑485 to optical fiber and provides segment monitoring and fault detection. This manual describes how to configure the device using DIP switches and outlines its basic operation.
Key sections cover function introduction, supported topologies (linear, star, redundant ring), echo monitoring modes, segmentation handling, slot‑time calculations, and optical‑port signal detection. Practical notes on installation, fault indicators and recommended configuration parameters are also included.
| Send echo support | yes |
|---|---|
| Monitor echo support | yes |
| Suppress echo support | yes |
| Segmentation support | yes |
If no signal is received on the RS‑485 segment, the OLM blocks the signal and stops forwarding it until a new valid message is detected.