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3.Remote communication between two PCS S7-200PLCs
Two pcs S7-200PLC can achieve remote communication on the Internet via the ES-ETH-PPI, you
need a router which supports dynamic domain name (DNS),in order to avoid the high cost of
fixed IP address from the local telecom, and this router is very common now, please notice the
instructions on the package when you purchase it.
Please notice that when the two PLCs are communicated via ES-ETH-PPI, you only can use the
RS485 free port communication protocol,not support PPI, advanced PPI, multi-master PPI protocol,
MPI and PROFIBUS protocol.
Use two pcs ES-ETH-PPI to connect with two pcs S7-200PLC,the switch of communication
mode select 11 or 10 bit, it depends on the free port RS485 protocol communication parameters
which are setted in your PLC.
11-bit mode: 8 data bits, even parity, 1 stop bit (8E1)
10-bit mode: 8 data bits, no parity, 1 stop bit (8N1)
set one of ES-ETH-PPI as client,set the other ES-ETH-PPI as server,the router of server side
needs to have the DNS function,and can normally run the domain name on this router,as shown
below.
