6/12/2016 7:41 PM | |
Joined: 9/27/2006 Last visit: 9/20/2024 Posts: 12282 Rating: (2684) |
Hello Vicky; Providing a straightforward answer on this subject will require a few detours, since it involves PLCs by Siemens for the Asian markets that we have no access to directly, and information on networks related to the Profibus family. First: the integrated RS-485 interface of the S7-200 SMART CPUs does not support Profibus-DP; the programming protocol used is PPI: Serial port supports the following protocols: • Modbus RTU • PPI • USS • Free port communication (for interconnection with Bar code scanners, weighing scales, serial printers etc.) Second, OLMs cannot be used with MPI or PPI networks: - Setting up an MPI network with PROFIBUS OLMs https://support.industry.siemens.com/cs/ww/en/view/8574670 MPI is based on the physical configuration and message configuration of PROFIBUS. The network parameters however are assigned by STEP 7 for MPI. There is no way of adapting the MPI network parameters. Release of the PROFIBUS Optical Link Modules for MPI networks is therefore not possible. - OLM and PPI network https://support.industry.siemens.com/tf/ww/en/posts/2985/ Third, to use an OLM extension (over fiber-optic cable) you therefore need to use the S7-200 SMART CPU as a Profibus node. This can be done with a special communication module that allows the S7-200 SMART CPU access to a Profibus network as a Profibus slave: 8.5.1.2 Using the EM DP01 to connect an S7-200 SMART as a DP device The S7-200 SMART CPU can be connected to a PROFIBUS DP network through the EM DP01 PROFIBUS DP module. (6ES7 288-7DP01-0AA0). The EM DP01 is connected to the S7-200 SMART CPU as an expansion module. The PROFIBUS network is connected to the EM DP01 PROFIBUS DP module through its DP communications port. Conclusion: to use an OLM in your project you will need to add a EM DP01 comm module to the S7-200 SMART system. Hope this helps, Daniel Chartier
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6/24/2016 12:57 PM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by porfirio79 is split to a separate thread with the subject s7-300 2dp conected to s7-226, need a re-configuration. Best regards |
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