
USER MANUAL – Z-KEY
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12.
Gateway Modbus TCP-IP / Modbus RTU (2 port Slaves)
In this scenario a Modbus TCP-IP master is connected with ethernet to Z-KEY, Two PLCs with only the
Modbus Master protocol are connected to the Z-KEY Modbus slave ports. By this ports the PLC can
communicate with each other.
A typical LAN connection is represented into this figure:
12.1.
How it works
A lot of PLCs have the limitation that only the Modbus Master protocol is implemented. When values from the
Modbus Slaves must be shared with another PLC/SCADA/DATALOGGER etc.. the Z-KEY can be configured in Gateway
mode with the 2 ports in Modbus Slave.
In this way the two PLCs and the Ethernet Clients can freely write/read the Z-KEY Shadow memory for data sharing:
Summary of Contents for Z-KEY
Page 19: ...USER MANUAL Z KEY 19 Then click on send configuration to Z KEY button ...
Page 78: ...USER MANUAL Z KEY 78 Now Click on Launch Setup Press Finish the com0com setup will open ...
Page 87: ...USER MANUAL Z KEY 87 ...
Page 99: ...USER MANUAL Z KEY 99 UINT16 0 OK 40057 FP LSW 0 000000 FAIL ...