1/5/2020 11:39 AM | |
Posts: 1 Rating: (0) |
Sir, This relates to the EM6400 Modbus RTU which specific Cp341 type supports modbus RTU ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 01/07/2020 09:48:22New subject after splitting |
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1/5/2020 8:16 PM | |
Joined: 9/27/2006 Last visit: 9/21/2024 Posts: 12282 Rating: (2684) |
Hello student; The attachment below shows you all 3 models of CP 341; they are different only in the type of interface they support, which is dictated by the interface type of the slave(s) you want to control. All CP 341 can be Modbus RTU masters. Siemens' solution for Modbus RTU master on a CP 341 involves the purchase of a loadble driver for the CP 341/ CP 441-2, along with a dongle that must be inserted in the back of the CP 341 to enable the use of the driver on that CP. The part number of the software/dongle is in the attachment, here is a link to the manual: SIMATIC S7-300/S7-400 Loadable Driver for Point-to-Point CPs: MODBUS protocol, RTU format, S7 is master https://support.industry.siemens.com/cs/us/en/view/1220184 A interesting alternative has been developed by our friend TIBI68, and is available here: MODBUS RTU MASTER FOR CP340/341/441-X (NO DONGLE REQUIRED) Both solutions work well, but TIBI68's code is only supported by himself, as an ongoing discussion on the forum. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 01/06/2020 12:26:49 |
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