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3/11/2008 1:05 PM | |
Joined: 9/29/2005 Last visit: 4/26/2022 Posts: 313 Rating: (24)
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Hi! for the S7-200 there are libraries with MODBUS DP but not MODBUS TCP. This means as you already explained, that its up to you to rebuild - AT communication between serial interface and GPRS modem - MODBUS TCP protocol and place it into TCP/IP protocoll of your GPRS communication and of corse you have to do this on the remote station too. Before thinking about that more detailed what about that: http://www.industry.siemens.com/IT4Industry/EN/solution_services/simatic_addons/proto_mod.htm and http://support.automation.siemens.com/WW/view/en/24960449 Means --> S7-300+CP IE+MD740-1 <<<<<GPRSNetwork>>>>>> Router IE bye Lif |