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5/2/2010 7:22 PM | |
Joined: 1/7/2006 Last visit: 12/23/2024 Posts: 2705 Rating: (320)
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A1. See the link: Which hardware components / interfaces can you use to connect the PtP CPs CP340, CP341 and the ET 200S 1SI module in a PROFIBUS DP master system, PROFINET IO system or to an IE/PB link?for further information. If you have more then 32 byte modbus communcation, then it will cost more cycle to transfer the data to the Modbus Slave. Depending on how fast you need this communication it will be ok or not. The 32 byte is the I/O that the module is using for the communication. A2. Pleas use PROFIBUS DP !! Why not using a SIMATIC HMI Panel, then you don't need to type over the symbolic ? A3. When you need trouble with the operators of the plant then you could use Modbus..... A4. All most all the SIMATIC HMI panels are direct capable to communicate with PROFIBUS. Depending on which CPU you are using, it is possible to directly have a DP-port onboard... |
I hope that the answer will help, if you have still questions, don't hesitate to ask me. |
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