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Industrial Automation
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Industrial Automation
Forum E14 Community recommendation for ModBus TCP client
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Forum Thread Details
  • Replies 29 replies
  • Subscribers 288 subscribers
  • Views 829 views
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  • modbus testing
  • modbus
  • client application
Related

E14 Community recommendation for ModBus TCP client

colporteur
colporteur 2 months ago

I am looking for an application to query a ModBus TCP interface on a scale head?

image

The company I am working for has recently installed a RiceLake 1280 scale indicator with a Modbus TCP interface. The scale indicator is IP capable and resides in a network DMZ. The goal is to have a cloud vendor pull scale data over the network from the Modbus interface. I'm looking for an application that can query the Modbus interface to confirm communication with the interface. 

The scale vendor recommended an application in order to set the Modbus TCP interface IP address. I managed to get that working, proving the interface IP answers an IP ping. DMZ rules have been set in place to isolate the indicator. I want to test that the cloud vendor can get to the Modbus interface and pull the data. I'm thinking maybe there is a software tool like minicom is for serial communication, except the tool is for Modbus.

E14 has some great Modbus resources but nothing to match my search. A Modbus client query tool. I'm hoping there is a community member that has experience with Modbus TCP and that they could recommend application software to perform the task.

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  • BigG
    BigG 2 months ago

    Having never done this, I was curious. So, decided to ask my AI assistant as this is how I am now learning these days. You learn by doing. The benefit with this method is that it pays to be wrong and AI is great at doing that. It simply sets a direction and off you go. Maybe this is helpful...

    gemini.google.com/.../9aba1ba75b87

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  • colporteur
    colporteur 2 months ago in reply to BigG

    I completely forgot about CLI netcat! I recall you can setup a transmit and receiving end on ports you are examining.

    Man I miss tech coffee breaks. All those minds in one place was a great technical pool of knowledge.

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  • colporteur
    colporteur 2 months ago in reply to BigG

    I completely forgot about CLI netcat! I recall you can setup a transmit and receiving end on ports you are examining.

    Man I miss tech coffee breaks. All those minds in one place was a great technical pool of knowledge.

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  • BigG
    BigG 2 months ago in reply to colporteur

    Ah fantastic. Not that I would know (noob here). Apparently with netcat, you can transmit the structured Modbus application bytes and see if the hardware replies. This completely validates both the firewall rules and the device's availability in one go.

    Searching online brought up this page: stackoverflow.com/.../send-modbus-rtu-request-via-tcp-with-netcat-and-catch-the-response

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