Guys, I need help connecting RS485 - Modbuss to a clp
I am a machine manufacturer and I use HMIs from other brands.
I have never connected a UART HMI, always conventional ones.
The ESTONE product is excellent, but communicating with them is extremely difficult.
How is Modbuss addressing in the HMI? How do I address the entire system?
Thanks

 

Welcome to the Control.com forums!

In order to better assist you with your issue, please provide more specific details of what it is you're trying to accomplish.

I need help connecting RS485 - Modbuss to a clp

Can you elaborate on what "clp" is?

How do I address the entire system?

What system? What equipment is involved besides the HMI?

What is the exact model number of your HMI? This seems to determine what communication options are available.


From what I can tell from the documents you provided, the HMI does not support the Modbus protocol. Instead, it supports a proprietary, JSON-based command set. However, this command set seems to be more focused on what is being displayed on the HMI, and how (for example, setting the state or value of specific widgets), instead of focusing on process values. How, exactly, are you trying to use this HMI?

As a general note, it seems this STONE display device is not actually a full-fledged HMI. It is a TFT LCD Module Display. It seems the purpose of this device may be to simply be used as a screen if you were building your own HMI that also includes a microcontroller (MCU) that controls what, and how, things are displayed on the STONE display. It doesn't seem to be intended to work as a stand-alone HMI that would connect to a PLC or similar equipment via a standardized protocol such as Modbus.

 

Hi Sutto,

I believe you meant "plc" instead of "clp" ? if so, what is PLC brand/model that yiu are going to connect to this ESTONE HMI ?

From manual that you shared, ESTONE HMI is supported two communication methods :
- JSON through serial port
- customized HEX through serial port

so your PLC should be supporting communication through : either JSON or customized HEX

sample of PLC that support JSON communication is Siemens S7-1500
Sample of PLC that support customizable HEX is AB Controllogix through BASIC module
so we need to know what PLC you are going to use ?

I check and found, ESTONE TFT display is designed for use mainly with ARDUINO and RASPBERRY PI through UART, although on their website I saw the new STW series is supporting Modbus but no detailed explanation on this.

For Modbus Application, I believe you have to create your own Modbus RTU / ASCII program using STONE Toolbox customized command set