Product Characteristics
4.2 Installation
SIMATIC NET PROFIBUS, Optical Link Module
22 Operating Instructions, 07/2008, A2B00065774O, Edition V1.5
4.2.3 Setting compatibility, mode and transmit power
Please note the following:
The OLM must be switched off when changing the mode. You can achieve this for
example by disconnecting the 5-pin terminal block.
4.2.3.1 Setting the compatibility
With DIL switch S7, you can enable or disable functional compatibility with devices
of the previous generation SINEC L2FO OLM/P3, -P4, -S3, -S4, S3-1300 and S4-
1300. The default setting of S7 is position 0 (compatibility disabled).
DIL switch S7 (compatibility) in position 0:
Compatibility with SINEC L2FO OLM/P3, -P4, -S3, -S4, -S3-1300, -S4-1300
disabled
DIL switch S7 (compatibility) in position 1:
Compatibility with SINEC L2FO OLM/P3, -P4, -S3, -S4, -S3-1300, -S4-1300
enabled
By setting DIL switch S7 to 1, the functionality compatibility with optical link
modules SINEC L2FO OLM/P3, OLM/P4, OLM/S3, OLM/S4, OLM/S3-1300 and
OLM/S4-1300 is enabled. This mode is necessary for mixed operation of these
modules with the OLM V4.0. Only set the S7 switch to position 1, if the PROFIBUS
OLM is used as replacement or extension device in existing networks with SINEC
L2FO OLM and a direct optical connection is required. To interconnect OLM V3
and OLM V4.0, switch S7 must be set to position 0 because these devices are
directly compatible.
The effects of the DIL switches involving compatibility mode are described in Table
4-2.
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