ModBus comunication

[Sujaira]

Hello, I'm new in the HMI programs but I'm working whit this Sortware and I was wondering how is the comunication between the computer and the PLC?? I'm ussing a serial port and then also I need to know how is the comunication ussing an IP adress ?? Can I use modbus to do this ??
please I really need help in this area.
Thanks

[qwideman]

Hi Sujaira,

There are two types of Modbus that I am familiar with. You are referring to modbus RTU, which is modbus over a RS232 interface using a serial port. There is no driver for that yet. Archie suggested I look for that feature around December-January (see http://advancedhmi.com/forum/index.php?topic=180.0)


The other type of Modbus is Modbus TCP/IP, which is modbus over ethernet. I am using this right now, and it is working great.


Quinton Wideman
Rolan Inc.

[Sujaira]

Thanks Wideman, I need both actually I have 5 PC whit a SCADa application that is going to be coneccted to PLC ussing the protocol Modbus RTU and sends this data to the control center by a modbus TCP/IP but the current sotfware is obsolet so I need to program a new one.

Is the advance HMI good for this cain of proyect ??

[qwideman]

Hi Sujaira,

AdvancedHMI works well as a SCADA in my opinion, without requiring any programming.
What you are doing may, or may not, require some programming - but that is fun too.

I recommend using AdvancedHMI, which is what I'm doing.
Yes its good.

Quinton Wideman
Rolan Inc.