3/18/2009 3:33 PM | |
Posts: 5822 Rating:
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Hello, as you want to use 74 Modbus Slaves you need, 3 CP 341 with RS 485 interfaces. If you refer to the manual: Loadable Driver for Point-to-Point CPs MODBUS Protocol RTU-Format S7 is Master you will find the max number of Slaves for each Master. Sadly you did not mention how you plan to interconnect to the 3rd party devices... if you want to use Modbus too or if you use any other System. Therefore I am not able to tell you if you may use SIEMENS components to do so. Best regards J_Bell |
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