
6 Communication settings and guide of HMI connecting with controller
2. Long distance communication with MPI adapter:
Extend the RS485 port:
The cable length must be 600m or less in the 187.5k ,the 7 pin and 2 pin must connect with 24v power
in the port of RS485, the 8 pin and 3 pin must connect with 120Ωterminal resistance.
3. MPI MT5-S7-300 Adapter by Eview Corporation direct connected with HMI is RS232 communication
Siemens S7-300/400 (via MPI port) RS485 communication
Ethernet communication protocol cable
Connecting PC and HMI use cross-ruling; use Cross-over cable or cross-ruling via hub or switch.
a. cross-ruling cable diagram:
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