A while ago, I created a Modbus simulator (Master/Client) and made it available for download.

If you'd like to try it out, feel free.

It's available for Windows and Linux.

Languages:
Portuguese
Spanish
English
Italian



scanbus.com.br

 

I'll give it a try and report back

 

I'll give it a try and report back

feedback is always good

 

A while ago, I created a Modbus simulator (Master/Client) and made it available for download.

If you'd like to try it out, feel free.

It's available for Windows and Linux.

Languages:
Portuguese
Spanish
English
Italian

View attachment 5028

scanbus.com.br

This looked interesting. But unfortunately the web page is not in English.
For wider reach could you please provide the link for the content in English language ?
Also provide:
1.) the direct links for downloads.
2.) Have portable version which can without Admin right needs. Since in most field HMIs the operators will not have elevated rights to run EXEs
3.) Have it digitally signed so that it can be white listed by the Cyber security systems.

 

This looked interesting. But unfortunately the web page is not in English.
For wider reach could you please provide the link for the content in English language ?
Also provide:
1.) the direct links for downloads.
2.) Have portable version which can without Admin right needs. Since in most field HMIs the operators will not have elevated rights to run EXEs
3.) Have it digitally signed so that it can be white listed by the Cyber security systems.

1. English content can be found here.

https://github.com/ortegahernandes/...file#scanbus-br-modbus-simulator-masterclient

Most browsers have automatic translation.

2. It's already portable.

3. This software doesn't generate any income for me; it's just a template (use it if you want).
If you find it useful, feel free to use it.

It probably won't have a digital signature.

 

A while ago, I created a Modbus simulator (Master/Client) and made it available for download.

If you'd like to try it out, feel free.

It's available for Windows and Linux.

Languages:
Portuguese
Spanish
English
Italian

View attachment 5028

scanbus.com.br

Hi, can this be used to connect with rex640 protection relay? Beginner here.

 

I don't know your equipment, but if it has a modbus output (TCP or RTU) I believe so.

 

I don't know your equipment, but if it has a modbus output (TCP or RTU) I believe so.

Thank you.

 

For Modbus testing and simulation, here are a few tools that work well:

- QModMaster (free, open-source) - good for basic master testing
- modpoll (free CLI) - great for scripting automated tests
- ModbusSimulator (modbussimulator.com) - combines master + slave with TCP/RTU/ASCII in one tool

The key advantage of having both master and slave in one application is being able to simulate the entire communication chain. During commissioning, I set up a slave simulator matching the device register map and test all polling groups before connecting to real hardware. Catches addressing and byte-order issues early.

For TCP debugging, Wireshark with the 'modbus' display filter is also invaluable.