mitsi q series ethernet qj71e71-100

[johnm22 0]

hi all

regarding : mitsi q series ethernet qj71e71-100.

there's an old coax network at a client's chicken factory that's fallen over.

it used to play telephone operator sending and receiving data from the boss to the serfs, and this was done via 'mnet/h' as a control station in the boss plc, with associated user table of pigeon holes defined in 'network range assignment'.

poking around, I suspect that if we substitute the above ethernet module in the boss (and in each of the serfs) then we cannot do the telephone operator thing, and have to write a load of sread and swrite ladder logic...

please comment...

regards john, cheshire

 

[collinsd70 30]

Hi John.

You are referring to a Melsec NET/H Connection which is normally a fiber loop, the older Melsec Net/10 was a coaxial cable.

From memory- the MELSEC NET protocol is a little more robust and is easier to send large packets of data between various controllers.

HOWEVER- the QJ71E71-100 does have the capability to read and write to other controllers- but it does not work the same way. The amount of data will depend on the communication method used and whatever Words/ Bits you send; will need to be fed to the input parameters.

What hardware are you using (CPU)?, what software are you using? what is the data size you wish to send/ receive between controllers?, is it just 2 controllers that this communication needs to be established with?

I have the FB's you will need- but "which one" totally depends on the requirements of your application

Regards

Daniel

Edited 31 May 2019 by collinsd70