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Hi, i have a question about choosing a good network for my project..which is reading PLC data from Siemens S7-400 PLC's.
The PLC structure which our company uses is the following:..
there are several machines which are controlled by a master PLC (S7-400) each machine has 3 units which are controlled by a S7-300 PLC and are connected to the master PLC by a MPI network.
The S7-400 master PLC has also 11 components connected by profibus and each unit(S7-300) has +/- 5 profibus components attached.
the problem is as following: I have to choose a network type where i can collect data from the several master S7-400 PLC's by a OPC server.
my question to u is, do i have to buy CP443-1 ethernet modules and connect the masters by ethernet or is there any kind of switch which is capable of connecting several MPI networks or Profibus networks? and what is the best sollution.
i hope that u can help me.
thanks in advance
The PLC structure which our company uses is the following:..
there are several machines which are controlled by a master PLC (S7-400) each machine has 3 units which are controlled by a S7-300 PLC and are connected to the master PLC by a MPI network.
The S7-400 master PLC has also 11 components connected by profibus and each unit(S7-300) has +/- 5 profibus components attached.
the problem is as following: I have to choose a network type where i can collect data from the several master S7-400 PLC's by a OPC server.
my question to u is, do i have to buy CP443-1 ethernet modules and connect the masters by ethernet or is there any kind of switch which is capable of connecting several MPI networks or Profibus networks? and what is the best sollution.
i hope that u can help me.
thanks in advance