7/26/2019 3:13 PM | |
Joined: 9/27/2006 Last visit: 4/23/2024 Posts: 12257 Rating: (2665)
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Hello Kartik; The SM 336 F_analog input module you are using in your project is a Failsafe module, recognised by Siemens Distributed Safety and F-Systems configurators. But it is also (at the same time) a HART module, which is why it is limited to current signals (0-20/4-20 mA). HART communications provide extensive instrument diagnostics through Simatic PDM, allowing the controller to monitor and calibrate the connected instruments. https://en.wikipedia.org/wiki/Highway_Addressable_Remote_Transducer_Protocol The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems. See this Product Information page from the Siemens Industry Mall: https://mall.industry.siemens.com/mall/en/ru/Catalog/Products/10121872?tree=CatalogTree Since the SM 336 is the only available F-AI module in the ET 200M family,working with Siemens F-Systems will therefore not allow you to work with voltage signals. Note however that this is not universal, many other manufacturers work with voltage signals on their Failsafe systems. For example, Rockwell's Point Guard I/O system: https://literature.rockwellautomation.com/idc/groups/literature/documents/um/1734-um013_-en-p.pdf Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 07/27/2019 15:42:26 |
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