I have a modbus tcp connection between two unit..
Lets say that
PLC_A (Master ) <-> PLC_B (Slave)
Since they are using a modbus tcp connection one can write to a certain coil address and the other one can read that data..
Like A can write on address 0 and B can read from this address..
My question is now where is the complete data table stored, is it stored in the slave or the master?.. More specifically who is the bottleneck in this connection, and limits the size of the memory map of the data table ?