Q Series PLC Serial Communication

[stevencgj96]

Hi all,

Recently I am having a project using the QJ71C24N-R2 serial communication module to communicate with another machine using RS-232. In this project, I will need to send command to the machine and receive data from the machine.

I had come across the predefined protocol support function in GX-Works2. Just want to know if I had configure the protocol inside the predefined protocol support function, does this means that the module will keep send the command that I had configured without the need of writing ladder program?

 

 

[Gambit]

You still need a program but only a few lines for executing the protocol and opening a connection.
 

[stevencgj96]

Do you have any example or reference I can have a look?

[Gambit]

should be in the e-manual viewer or pdf. just serach for pre-defined protocol.
it should have an example. 
 

[stevencgj96]

Do you know what is the difference between non-procedural protocol and pre-defined protocol?

[Gambit]

non procedure is where you basically write the protocol handeling in your program
When you are using pre-defined protocol you use use the pre defined protocol support function in your software, where you can create sets of Requests and replies, 
In  your sequence program you will only need to activate them.