Setting The Mode Of The Optical Channels (Ch2/Ch3) - Siemens SIMATIC NET Operating Instructions Manual

4.2.3

Setting the mode of the optical channels (CH2/CH3)

Note
The following information applies only to the default setting of S7 (S7 = 0); in other words,
compatibility turned off.
With the DIL switches S1 and S2, you set the mode of the optical channel CH2.
With the DIL switches S3 and S4, you set the mode of the optical channel CH3.
For an OLM with only one optical interface, S3 and S4 have no function.
The mode can be set separately for each optical channel. Combinations of the modes "bus
with fiber-optic link monitoring and segmentation" and "bus without fiber-optic link
monitoring" are possible.
Always set the same mode for the two optical channels connected together via the fiber-optic
cable. When operating with devices that do not provide fiber-optic link monitoring, this mode
cannot be used and must be disabled on the OLM.
Mode "bus with fiber-optic link monitoring and segmentation"
Mode "bus without fiber-optic link monitoring"
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06
CH2 is set to this mode when S1 and S2 are in position 0.
CH3 is set to this mode when S3 and S4 are in position 0.
CH2 is set to this mode when S1 is in position 1 and S2 is in position 0.
CH3 is set to this mode when S3 is in position 1 and S4 is in position 0.
Operator control (hardware)
4.2 Setting the operating mode
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