Common PLC and touch screen wiring method - Database & Sql Blog Articles
Siemens TP27-6 touch screen and computer connection 
0 port address 2 port 1 address 3 on plc, 1 port is connected to TP27, and the touch screen remote address is set to 3. The baud rate corresponds.
Siemens TP270-6 touch screen connection
1. Program download (232 and microcomputer communication)2, 3; 4, 6; 7, 8 pairs, 5 direct, 1, 9 floating.
2. Connection to the S7-200
One uses an MPI cable. It adopts 6 connectors of 6ES7922-OBA12-DXA0, and is connected by PROFIBUS cable in the middle. It has strong anti-interference ability and is recommended.
The other is a contingency plan, with 2, 3, 5, and 8 direct connections.
At the same time, the corresponding communication method, address and baud rate are unified by the corresponding software.
PC (9D mother) PLC (9D public)
2, 3 direct connection, 5 to 9; PC terminal 4, 6 short circuit, 7, 8 short circuit; PLC terminal 4, 5 short circuit
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