Existing a PLC and a 4 g DTU, as from the stand of HMI, communication between the two of them?

CodePudding user response:

Can't be communication between from the station

CodePudding user response:

Although is physically connected, but from the station is not visible to each other,

CodePudding user response:

But the main can be forwarded,

CodePudding user response:

Through the main relay transmission

CodePudding user response:

Modbus is a master-slave protocol, forever only on the host requests from the machine, to have a response!